PATCHY FREEZING DRIZZLE IS POSSIBLE ACROSS PORTIONS OF NORTHERN
ILLINOIS AND NORTHWEST INDIANA EARLY THIS EVENING...ALONG WITH
AREAS OF FOG.
MOIST LOW LEVELS...COMBINED WITH A WEAK UPPER LEVEL DISTURBANCE
PASSING OVER THE AREA THIS EVENING...WAS RESULTING IN AREAS OF
FOG AND PATCHY FREEZING DRIZZLE...OCCASIONALLY ALTERNATING WITH A
FEW LIGHT SNOW FLURRIES WHERE SLIGHTLY DEEPER CLOUD LAYERS
DEVELOP. SURFACE TEMPERATURES GENERALLY AT OR JUST BELOW FREEZING
MAY RESULT IN SOME MINOR ICE ACCUMULATION WHERE FREEZING DRIZZLE
OCCURS...PARTICULARLY ON UNTREATED SURFACES SUCH AS SIDEWALKS...
PARKING LOTS AND LIGHTLY TRAVELED ROADS...ESPECIALLY OUTSIDE OF
THE SLIGHTLY WARMER MORE URBANIZED AREAS OF CHICAGOLAND. LIGHT
WINDS WERE ALSO COMBINING WITH THE MOIST LOW LEVEL AIR TO PRODUCE
AREAS OF FOG...REDUCING VISIBILITY TO 1 TO 3 MILES OVER PORTIONS
OF NORTH CENTRAL ILLINOIS AND WITH A FEW AREAS EXPERIENCING
VISIBILITY REDUCED LOCALLY TO LESS THAN A MILE.
ANOTHER UPPER DISTURBANCE APPROACHING LATER THIS EVENING SHOULD
PRODUCE DEEPER...COLDER CLOUDS WHICH SHOULD FAVOR LIGHT SNOW OR
FLURRIES RATHER THAN FREEZING DRIZZLE.
IF DRIVING...OR WALKING ACROSS NORTHERN ILLINOIS OR NORTHWEST
INDIANA THIS EVENING...BE ALERT FOR THE POTENTIAL FOR SOME LIGHT
ICE ACCUMULATION FROM FREEZING DRIZZLE AND USE APPROPRIATE
CAUTION.
Friday, December 28, 2012
Wednesday, December 26, 2012
Test Message 11:00:16.3921984
THIS IS THE WEEKLY TEST OF THE WXWARN1 ALERT SYSTEM THIS IS ONLY A TEST
Monday, December 24, 2012
Flood Potential Outlook 13:54:29.4956830
IN TABLE 1 BELOW...THE CURRENT (CS) AND HISTORICAL (HS) OR NORMAL
PROBABILITIES OF EXCEEDING MINOR...MODERATE...AND MAJOR FLOOD STAGES
ARE LISTED FOR THE VALID TIME PERIOD.
CS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY
BASED ON CURRENT CONDITIONS.
HS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY
BASED ON HISTORICAL OR NORMAL CONDITIONS.
WHEN THE VALUE OF CS IS MORE THAN HS...THE PROBABILITY OF
EXCEEDING THAT LEVEL IS HIGHER THAN NORMAL. WHEN THE VALUE OF CS IS
LESS THAN HS...THE PROBABILITY OF EXCEEDING THAT LEVEL IS LOWER
THAN NORMAL.
...TABLE 1--PROBABILITIES FOR MINOR...MODERATE AND MAJOR FLOODING...
VALID PERIOD: 12/31/2012 - 3/31/2013
: CURRENT AND HISTORICAL
: CHANCES OF EXCEEDING
: FLOOD CATEGORIES
: AS A PERCENTAGE (%)
CATEGORICAL :
FLOOD STAGES (FT) : MINOR MODERATE MAJOR
LOCATION MINOR MOD MAJOR : CS HS CS HS CS HS
-------- ----- ----- ----- : --- --- --- --- --- ---
:HART DITCH
DYER 12.0 13.0 14.0 : <5 <5 <5 <5 <5 <5
:THORN CREEK
THORNTON 10.0 15.0 16.0 : 5 16 <5 <5 <5 <5
:LITTLE CALUMET RIVER
MUNSTER 12.0 14.0 17.0 : 25 35 6 11 <5 5
SOUTH HOLLAND 16.5 18.0 20.0 : <5 <5 <5 <5 <5 <5
:KANKAKEE RIVER
DUNNS BRIDGE 10.0 12.0 13.0 : 6 35 <5 10 <5 6
KOUTS 11.0 13.0 14.0 : 6 36 <5 11 <5 6
SHELBY 9.0 11.0 12.5 : 40 76 13 36 <5 18
MOMENCE 5.0 6.5 9.0 : 11 25 <5 10 <5 <5
:IROQUOIS RIVER
RENSSELAER 12.0 14.0 15.0 : 21 33 6 10 5 6
FORESMAN 18.0 22.0 24.0 : 15 20 <5 5 <5 <5
IROQUOIS 18.0 24.0 25.0 : 35 46 <5 8 <5 <5
:SUGAR CREEK
MILFORD 18.0 22.0 26.0 : 36 55 6 13 <5 5
:IROQUOIS RIVER
CHEBANSE 16.0 18.0 20.0 : 5 15 <5 11 <5 <5
:KANKAKEE RIVER
WILMINGTON 6.5 8.0 10.0 : 6 16 <5 5 <5 <5
:DES PLAINES RIVER
RUSSELL 7.0 9.0 10.0 : 26 43 <5 <5 <5 <5
GURNEE 7.0 9.0 11.0 : 11 23 <5 <5 <5 <5
LINCOLNSHIRE 12.5 14.0 15.5 : <5 8 <5 <5 <5 <5
DES PLAINES 5.0 8.0 9.0 : <5 6 <5 <5 <5 <5
RIVERSIDE 7.0 8.0 9.0 : 13 15 5 5 <5 <5
LEMONT 10.0 11.0 12.0 : 23 28 10 11 <5 <5
:W BR DU PAGE RIVER
WARRENVILLE 11.5 14.5 17.5 : 5 11 <5 <5 <5 <5
:EAST BRANCH DU PAGE RIVER
BOLINGBROOK 19.5 21.0 23.0 : 23 31 5 6 <5 <5
:DU PAGE RIVER
SHOREWOOD 6.5 8.0 10.0 : 8 8 <5 <5 <5 <5
:MAZON RIVER
COAL CITY 12.0 14.0 17.0 : 5 11 <5 <5 <5 <5
:FOX RIVER
ALGONQUIN TAILWAT 9.5 10.5 12.0 : 13 36 5 11 <5 5
MONTGOMERY 13.0 14.0 15.0 : 15 31 <5 <5 <5 <5
DAYTON 12.0 14.0 24.0 : 10 26 <5 6 <5 <5
:VERMILION RIVER
PONTIAC 14.0 15.0 18.0 : 5 13 <5 10 <5 5
LEONORE 16.0 21.0 26.0 : 6 33 <5 8 <5 <5
:PECATONICA RIVER
SHIRLAND 12.0 14.0 15.5 : <5 35 <5 11 <5 5
:ROCK RIVER
ROCKTON 10.0 11.0 14.0 : 8 20 <5 11 <5 <5
LATHAM PARK 10.0 11.0 14.0 : <5 13 <5 6 <5 <5
ROCKFORD 9.0 10.0 11.0 : <5 <5 <5 <5 <5 <5
:KISHWAUKEE RIVER
BELVIDERE 9.0 10.0 12.0 : <5 8 <5 8 <5 <5
:SOUTH BRANCH KISHWAUKEE RIVER
DE KALB 10.0 11.0 12.5 : <5 <5 <5 <5 <5 <5
:KISHWAUKEE RIVER
PERRYVILLE 12.0 18.0 22.0 : 6 30 <5 <5 <5 <5
:ROCK RIVER
BYRON 13.0 14.0 16.0 : <5 8 <5 <5 <5 <5
DIXON 16.0 18.0 20.0 : <5 6 <5 <5 <5 <5
:NORTH BRANCH CHICAGO RIVER
CHICAGO ALBANY AV 7.0 7.5 8.0 : <5 <5 <5 <5 <5 <5
:ILLINOIS RIVER
MORRIS 16.0 18.0 22.0 : 16 30 10 18 <5 <5
OTTAWA 463.0 466.0 469.0 : 13 25 5 11 <5 5
LA SALLE 20.0 27.0 31.0 : 38 60 6 13 <5 <5
LEGEND
CS = CONDITIONAL SIMULATION (CURRENT OUTLOOK)
HS = HISTORICAL SIMULATION
FT = FEET
IN TABLE 2 BELOW...THE 95 THROUGH 5 PERCENT COLUMNS INDICATE THE
PROBABILITY OF EXCEEDING THE LISTED STAGE LEVELS (FT) FOR THE VALID
TIME PERIOD.
...TABLE 2--EXCEEDANCE PROBABILITIES...
CHANCE OF EXCEEDING STAGES
AT SPECIFIC LOCATIONS
VALID PERIOD: 12/31/2012 - 3/31/2013
LOCATION 95% 90% 75% 50% 25% 10% 5%
-------- ------ ------ ------ ------ ------ ------ ------
:HART DITCH
DYER 3.5 3.6 3.9 4.9 5.8 7.0 7.4
:THORN CREEK
THORNTON 4.2 4.5 5.3 6.0 7.9 9.0 10.0
:LITTLE CALUMET RIVER
MUNSTER 8.5 8.9 9.8 10.7 12.0 13.0 14.7
SOUTH HOLLAND 8.8 9.0 9.8 10.7 12.3 13.5 13.7
:KANKAKEE RIVER
DUNNS BRIDGE 5.0 5.3 5.9 7.0 8.5 9.8 10.7
KOUTS 6.2 6.5 7.1 8.2 9.7 10.9 11.9
SHELBY 6.2 6.4 7.2 8.7 10.2 11.8 12.1
MOMENCE 2.2 2.3 2.8 3.5 4.4 5.4 5.6
:IROQUOIS RIVER
RENSSELAER 6.1 6.4 8.0 10.1 11.9 13.2 15.2
FORESMAN 9.1 9.5 11.9 14.8 16.7 18.8 20.4
IROQUOIS 8.1 8.6 12.3 15.7 20.6 22.4 23.8
:SUGAR CREEK
MILFORD 7.4 7.7 12.0 17.4 18.8 21.2 22.5
:IROQUOIS RIVER
CHEBANSE 4.6 5.2 7.0 9.6 12.6 15.1 16.7
:KANKAKEE RIVER
WILMINGTON 2.0 2.3 3.0 4.1 5.3 6.3 6.7
:DES PLAINES RIVER
RUSSELL 3.9 4.0 5.1 6.0 7.1 7.7 8.4
GURNEE 2.9 3.0 3.6 5.1 5.8 7.6 8.3
LINCOLNSHIRE 7.3 7.5 8.2 9.6 10.4 11.9 12.4
DES PLAINES 1.3 1.4 1.6 2.2 2.7 3.9 4.3
RIVERSIDE 3.6 3.8 4.4 5.6 6.2 7.5 8.1
LEMONT 7.3 7.5 8.1 9.4 10.0 11.3 11.7
:W BR DU PAGE RIVER
WARRENVILLE 8.9 9.2 9.7 10.1 10.6 11.0 12.2
:EAST BRANCH DU PAGE RIVER
BOLINGBROOK 17.0 17.2 18.0 18.8 19.4 20.6 21.4
:DU PAGE RIVER
SHOREWOOD 3.4 3.5 3.9 4.6 5.1 6.2 7.0
:MAZON RIVER
COAL CITY 3.3 3.8 4.7 6.5 8.7 10.8 12.3
:FOX RIVER
ALGONQUIN TAILWAT 5.5 6.2 6.8 8.1 9.2 9.9 10.6
MONTGOMERY 11.4 11.6 11.9 12.4 12.8 13.2 13.5
DAYTON 6.6 6.7 7.6 9.3 10.6 12.1 13.3
:VERMILION RIVER
PONTIAC 3.8 3.9 4.4 6.0 8.0 11.6 14.2
LEONORE 4.9 5.1 5.8 9.0 12.8 15.8 19.8
:PECATONICA RIVER
SHIRLAND 5.9 6.4 7.2 9.2 10.3 11.3 11.6
:ROCK RIVER
ROCKTON 4.7 4.8 5.9 7.3 8.4 10.0 10.5
LATHAM PARK 5.2 5.2 6.1 7.2 8.2 9.6 10.0
ROCKFORD 3.0 3.0 3.2 3.4 3.7 4.1 4.4
:KISHWAUKEE RIVER
BELVIDERE 1.9 2.3 3.3 4.3 5.5 7.0 7.5
:SOUTH BRANCH KISHWAUKEE RIVER
DE KALB 3.1 3.3 3.8 5.1 6.1 6.8 7.1
:KISHWAUKEE RIVER
PERRYVILLE 6.0 6.3 7.5 8.8 10.4 11.4 12.5
:ROCK RIVER
BYRON 6.6 6.9 7.7 9.1 10.2 11.2 12.6
DIXON 8.9 9.1 9.8 10.9 12.0 13.7 14.2
:NORTH BRANCH CHICAGO RIVER
CHICAGO ALBANY AV 2.3 2.5 2.8 3.5 3.9 4.3 4.5
:ILLINOIS RIVER
MORRIS 5.8 6.5 7.3 10.1 15.2 18.0 20.0
OTTAWA 458.8 458.9 459.1 459.4 461.8 464.2 466.8
LA SALLE 12.3 12.8 13.7 16.7 22.9 25.4 27.6
IN TABLE 3 BELOW...THE 95 THROUGH 5 PERCENT COLUMNS INDICATE THE
PROBABILITY OF FALLING BELOW THE LISTED STAGE LEVELS (FT) FOR THE
VALID TIME PERIOD.
...TABLE 3--NONEXCEEDANCE PROBABILITIES...
CHANCE OF FALLING BELOW STAGES
AT SPECIFIC LOCATIONS
VALID PERIOD: 12/31/2012 - 3/31/2013
LOCATION 95% 90% 75% 50% 25% 10% 5%
-------- ------ ------ ------ ------ ------ ------ ------
:HART DITCH
DYER 2.0 2.0 2.0 2.0 2.0 1.9 1.9
:THORN CREEK
THORNTON 2.7 2.7 2.7 2.7 2.7 2.7 2.7
:LITTLE CALUMET RIVER
MUNSTER 5.2 5.2 5.1 5.1 5.0 5.0 5.0
SOUTH HOLLAND 5.0 5.0 5.0 4.9 4.9 4.9 4.8
:KANKAKEE RIVER
DUNNS BRIDGE 2.1 2.1 2.1 2.0 1.9 1.8 1.8
KOUTS 3.2 3.2 3.2 3.1 3.0 3.0 2.9
SHELBY 3.6 3.6 3.5 3.5 3.4 3.2 3.2
MOMENCE 1.2 1.2 1.2 1.1 1.1 1.0 1.0
:IROQUOIS RIVER
RENSSELAER 3.3 3.3 3.3 3.2 3.2 3.1 3.1
FORESMAN 4.5 4.5 4.5 4.4 4.3 4.2 4.2
IROQUOIS 3.8 3.8 3.8 3.7 3.6 3.5 3.5
:SUGAR CREEK
MILFORD 2.8 2.8 2.8 2.7 2.7 2.6 2.6
:IROQUOIS RIVER
CHEBANSE 2.5 2.5 2.5 2.5 2.4 2.3 2.3
:KANKAKEE RIVER
WILMINGTON 0.8 0.8 0.8 0.8 0.8 0.7 0.7
:DES PLAINES RIVER
RUSSELL 2.4 2.4 2.4 2.3 2.3 2.3 2.3
GURNEE 1.4 1.4 1.3 1.3 1.2 1.2 1.1
LINCOLNSHIRE 5.8 5.8 5.8 5.7 5.6 5.6 5.6
DES PLAINES 0.8 0.8 0.8 0.8 0.7 0.7 0.7
RIVERSIDE 1.9 1.9 1.9 1.9 1.8 1.8 1.7
LEMONT 5.1 5.1 5.0 4.8 4.6 4.4 4.3
:W BR DU PAGE RIVER
WARRENVILLE 7.3 7.3 7.3 7.3 7.2 7.2 7.2
:EAST BRANCH DU PAGE RIVER
BOLINGBROOK 14.7 14.7 14.7 14.7 14.7 14.6 14.6
:DU PAGE RIVER
SHOREWOOD 2.0 2.0 2.0 2.0 2.0 2.0 2.0
:MAZON RIVER
COAL CITY 1.1 1.1 0.9 0.6 0.5 0.5 0.5
:FOX RIVER
ALGONQUIN TAILWAT 4.4 4.3 4.2 4.0 3.4 3.3 3.3
MONTGOMERY 11.0 11.0 10.9 10.8 10.8 10.7 10.6
DAYTON 5.0 5.0 5.0 4.8 4.8 4.6 4.5
:VERMILION RIVER
PONTIAC 2.6 2.6 2.6 2.6 2.6 2.5 2.5
LEONORE 3.1 3.0 3.0 3.0 3.0 2.9 2.9
:PECATONICA RIVER
SHIRLAND 2.5 2.5 2.5 2.3 2.1 2.0 1.9
:ROCK RIVER
ROCKTON 2.2 2.1 2.1 2.1 2.0 1.9 1.9
LATHAM PARK 3.2 3.2 3.1 3.1 3.0 3.0 2.9
ROCKFORD 1.9 1.9 1.9 1.9 1.8 1.7 1.7
:KISHWAUKEE RIVER
BELVIDERE 0.9 0.9 0.9 0.9 0.8 0.8 0.8
:SOUTH BRANCH KISHWAUKEE RIVER
DE KALB 2.7 2.7 2.7 2.7 2.7 2.6 2.6
:KISHWAUKEE RIVER
PERRYVILLE 5.1 5.1 5.1 5.0 5.0 5.0 5.0
:ROCK RIVER
BYRON 4.5 4.5 4.5 4.4 4.4 4.3 4.3
DIXON 7.0 7.0 6.9 6.9 6.8 6.7 6.7
:NORTH BRANCH CHICAGO RIVER
CHICAGO ALBANY AV 0.9 0.9 0.9 0.9 0.9 0.9 0.9
:ILLINOIS RIVER
MORRIS 4.6 4.6 4.6 4.6 4.6 4.6 4.6
OTTAWA 458.5 458.5 458.5 458.5 458.5 458.5 458.5
LA SALLE 10.6 10.6 10.6 10.6 10.6 10.6 10.6
THESE LONG-RANGE PROBABILISTIC OUTLOOKS CONTAIN FORECAST VALUES THAT
ARE CALCULATED USING MULTIPLE SEASON SCENARIOS FROM 30 OR MORE YEARS
OF CLIMATOLOGICAL DATA...INCLUDING CURRENT CONDITIONS OF THE
RIVER...SOIL MOISTURE...SNOW COVER...AND 30 TO 90 DAY LONG-RANGE
OUTLOOKS OF TEMPERATURE AND PRECIPITATION. BY PROVIDING A RANGE OF
PROBABILITIES...THE LEVEL OF RISK ASSOCIATED WITH LONG-RANGE PLANNING
DECISIONS CAN BE DETERMINED. THESE PROBABILISTIC FORECASTS ARE PART
OF THE NATIONAL WEATHER SERVICE'S ADVANCED HYDROLOGIC PREDICTION
SERVICE.
VISIT OUR WEB SITE WEATHER.GOV/LOT FOR MORE WEATHER AND WATER
INFORMATION.
THESE MONTHLY OUTLOOKS ARE TYPICALLY ISSUED DURING THE THIRD OR
FOURTH WEEK OF THE MONTH.
PROBABILITIES OF EXCEEDING MINOR...MODERATE...AND MAJOR FLOOD STAGES
ARE LISTED FOR THE VALID TIME PERIOD.
CS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY
BASED ON CURRENT CONDITIONS.
HS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY
BASED ON HISTORICAL OR NORMAL CONDITIONS.
WHEN THE VALUE OF CS IS MORE THAN HS...THE PROBABILITY OF
EXCEEDING THAT LEVEL IS HIGHER THAN NORMAL. WHEN THE VALUE OF CS IS
LESS THAN HS...THE PROBABILITY OF EXCEEDING THAT LEVEL IS LOWER
THAN NORMAL.
...TABLE 1--PROBABILITIES FOR MINOR...MODERATE AND MAJOR FLOODING...
VALID PERIOD: 12/31/2012 - 3/31/2013
: CURRENT AND HISTORICAL
: CHANCES OF EXCEEDING
: FLOOD CATEGORIES
: AS A PERCENTAGE (%)
CATEGORICAL :
FLOOD STAGES (FT) : MINOR MODERATE MAJOR
LOCATION MINOR MOD MAJOR : CS HS CS HS CS HS
-------- ----- ----- ----- : --- --- --- --- --- ---
:HART DITCH
DYER 12.0 13.0 14.0 : <5 <5 <5 <5 <5 <5
:THORN CREEK
THORNTON 10.0 15.0 16.0 : 5 16 <5 <5 <5 <5
:LITTLE CALUMET RIVER
MUNSTER 12.0 14.0 17.0 : 25 35 6 11 <5 5
SOUTH HOLLAND 16.5 18.0 20.0 : <5 <5 <5 <5 <5 <5
:KANKAKEE RIVER
DUNNS BRIDGE 10.0 12.0 13.0 : 6 35 <5 10 <5 6
KOUTS 11.0 13.0 14.0 : 6 36 <5 11 <5 6
SHELBY 9.0 11.0 12.5 : 40 76 13 36 <5 18
MOMENCE 5.0 6.5 9.0 : 11 25 <5 10 <5 <5
:IROQUOIS RIVER
RENSSELAER 12.0 14.0 15.0 : 21 33 6 10 5 6
FORESMAN 18.0 22.0 24.0 : 15 20 <5 5 <5 <5
IROQUOIS 18.0 24.0 25.0 : 35 46 <5 8 <5 <5
:SUGAR CREEK
MILFORD 18.0 22.0 26.0 : 36 55 6 13 <5 5
:IROQUOIS RIVER
CHEBANSE 16.0 18.0 20.0 : 5 15 <5 11 <5 <5
:KANKAKEE RIVER
WILMINGTON 6.5 8.0 10.0 : 6 16 <5 5 <5 <5
:DES PLAINES RIVER
RUSSELL 7.0 9.0 10.0 : 26 43 <5 <5 <5 <5
GURNEE 7.0 9.0 11.0 : 11 23 <5 <5 <5 <5
LINCOLNSHIRE 12.5 14.0 15.5 : <5 8 <5 <5 <5 <5
DES PLAINES 5.0 8.0 9.0 : <5 6 <5 <5 <5 <5
RIVERSIDE 7.0 8.0 9.0 : 13 15 5 5 <5 <5
LEMONT 10.0 11.0 12.0 : 23 28 10 11 <5 <5
:W BR DU PAGE RIVER
WARRENVILLE 11.5 14.5 17.5 : 5 11 <5 <5 <5 <5
:EAST BRANCH DU PAGE RIVER
BOLINGBROOK 19.5 21.0 23.0 : 23 31 5 6 <5 <5
:DU PAGE RIVER
SHOREWOOD 6.5 8.0 10.0 : 8 8 <5 <5 <5 <5
:MAZON RIVER
COAL CITY 12.0 14.0 17.0 : 5 11 <5 <5 <5 <5
:FOX RIVER
ALGONQUIN TAILWAT 9.5 10.5 12.0 : 13 36 5 11 <5 5
MONTGOMERY 13.0 14.0 15.0 : 15 31 <5 <5 <5 <5
DAYTON 12.0 14.0 24.0 : 10 26 <5 6 <5 <5
:VERMILION RIVER
PONTIAC 14.0 15.0 18.0 : 5 13 <5 10 <5 5
LEONORE 16.0 21.0 26.0 : 6 33 <5 8 <5 <5
:PECATONICA RIVER
SHIRLAND 12.0 14.0 15.5 : <5 35 <5 11 <5 5
:ROCK RIVER
ROCKTON 10.0 11.0 14.0 : 8 20 <5 11 <5 <5
LATHAM PARK 10.0 11.0 14.0 : <5 13 <5 6 <5 <5
ROCKFORD 9.0 10.0 11.0 : <5 <5 <5 <5 <5 <5
:KISHWAUKEE RIVER
BELVIDERE 9.0 10.0 12.0 : <5 8 <5 8 <5 <5
:SOUTH BRANCH KISHWAUKEE RIVER
DE KALB 10.0 11.0 12.5 : <5 <5 <5 <5 <5 <5
:KISHWAUKEE RIVER
PERRYVILLE 12.0 18.0 22.0 : 6 30 <5 <5 <5 <5
:ROCK RIVER
BYRON 13.0 14.0 16.0 : <5 8 <5 <5 <5 <5
DIXON 16.0 18.0 20.0 : <5 6 <5 <5 <5 <5
:NORTH BRANCH CHICAGO RIVER
CHICAGO ALBANY AV 7.0 7.5 8.0 : <5 <5 <5 <5 <5 <5
:ILLINOIS RIVER
MORRIS 16.0 18.0 22.0 : 16 30 10 18 <5 <5
OTTAWA 463.0 466.0 469.0 : 13 25 5 11 <5 5
LA SALLE 20.0 27.0 31.0 : 38 60 6 13 <5 <5
LEGEND
CS = CONDITIONAL SIMULATION (CURRENT OUTLOOK)
HS = HISTORICAL SIMULATION
FT = FEET
IN TABLE 2 BELOW...THE 95 THROUGH 5 PERCENT COLUMNS INDICATE THE
PROBABILITY OF EXCEEDING THE LISTED STAGE LEVELS (FT) FOR THE VALID
TIME PERIOD.
...TABLE 2--EXCEEDANCE PROBABILITIES...
CHANCE OF EXCEEDING STAGES
AT SPECIFIC LOCATIONS
VALID PERIOD: 12/31/2012 - 3/31/2013
LOCATION 95% 90% 75% 50% 25% 10% 5%
-------- ------ ------ ------ ------ ------ ------ ------
:HART DITCH
DYER 3.5 3.6 3.9 4.9 5.8 7.0 7.4
:THORN CREEK
THORNTON 4.2 4.5 5.3 6.0 7.9 9.0 10.0
:LITTLE CALUMET RIVER
MUNSTER 8.5 8.9 9.8 10.7 12.0 13.0 14.7
SOUTH HOLLAND 8.8 9.0 9.8 10.7 12.3 13.5 13.7
:KANKAKEE RIVER
DUNNS BRIDGE 5.0 5.3 5.9 7.0 8.5 9.8 10.7
KOUTS 6.2 6.5 7.1 8.2 9.7 10.9 11.9
SHELBY 6.2 6.4 7.2 8.7 10.2 11.8 12.1
MOMENCE 2.2 2.3 2.8 3.5 4.4 5.4 5.6
:IROQUOIS RIVER
RENSSELAER 6.1 6.4 8.0 10.1 11.9 13.2 15.2
FORESMAN 9.1 9.5 11.9 14.8 16.7 18.8 20.4
IROQUOIS 8.1 8.6 12.3 15.7 20.6 22.4 23.8
:SUGAR CREEK
MILFORD 7.4 7.7 12.0 17.4 18.8 21.2 22.5
:IROQUOIS RIVER
CHEBANSE 4.6 5.2 7.0 9.6 12.6 15.1 16.7
:KANKAKEE RIVER
WILMINGTON 2.0 2.3 3.0 4.1 5.3 6.3 6.7
:DES PLAINES RIVER
RUSSELL 3.9 4.0 5.1 6.0 7.1 7.7 8.4
GURNEE 2.9 3.0 3.6 5.1 5.8 7.6 8.3
LINCOLNSHIRE 7.3 7.5 8.2 9.6 10.4 11.9 12.4
DES PLAINES 1.3 1.4 1.6 2.2 2.7 3.9 4.3
RIVERSIDE 3.6 3.8 4.4 5.6 6.2 7.5 8.1
LEMONT 7.3 7.5 8.1 9.4 10.0 11.3 11.7
:W BR DU PAGE RIVER
WARRENVILLE 8.9 9.2 9.7 10.1 10.6 11.0 12.2
:EAST BRANCH DU PAGE RIVER
BOLINGBROOK 17.0 17.2 18.0 18.8 19.4 20.6 21.4
:DU PAGE RIVER
SHOREWOOD 3.4 3.5 3.9 4.6 5.1 6.2 7.0
:MAZON RIVER
COAL CITY 3.3 3.8 4.7 6.5 8.7 10.8 12.3
:FOX RIVER
ALGONQUIN TAILWAT 5.5 6.2 6.8 8.1 9.2 9.9 10.6
MONTGOMERY 11.4 11.6 11.9 12.4 12.8 13.2 13.5
DAYTON 6.6 6.7 7.6 9.3 10.6 12.1 13.3
:VERMILION RIVER
PONTIAC 3.8 3.9 4.4 6.0 8.0 11.6 14.2
LEONORE 4.9 5.1 5.8 9.0 12.8 15.8 19.8
:PECATONICA RIVER
SHIRLAND 5.9 6.4 7.2 9.2 10.3 11.3 11.6
:ROCK RIVER
ROCKTON 4.7 4.8 5.9 7.3 8.4 10.0 10.5
LATHAM PARK 5.2 5.2 6.1 7.2 8.2 9.6 10.0
ROCKFORD 3.0 3.0 3.2 3.4 3.7 4.1 4.4
:KISHWAUKEE RIVER
BELVIDERE 1.9 2.3 3.3 4.3 5.5 7.0 7.5
:SOUTH BRANCH KISHWAUKEE RIVER
DE KALB 3.1 3.3 3.8 5.1 6.1 6.8 7.1
:KISHWAUKEE RIVER
PERRYVILLE 6.0 6.3 7.5 8.8 10.4 11.4 12.5
:ROCK RIVER
BYRON 6.6 6.9 7.7 9.1 10.2 11.2 12.6
DIXON 8.9 9.1 9.8 10.9 12.0 13.7 14.2
:NORTH BRANCH CHICAGO RIVER
CHICAGO ALBANY AV 2.3 2.5 2.8 3.5 3.9 4.3 4.5
:ILLINOIS RIVER
MORRIS 5.8 6.5 7.3 10.1 15.2 18.0 20.0
OTTAWA 458.8 458.9 459.1 459.4 461.8 464.2 466.8
LA SALLE 12.3 12.8 13.7 16.7 22.9 25.4 27.6
IN TABLE 3 BELOW...THE 95 THROUGH 5 PERCENT COLUMNS INDICATE THE
PROBABILITY OF FALLING BELOW THE LISTED STAGE LEVELS (FT) FOR THE
VALID TIME PERIOD.
...TABLE 3--NONEXCEEDANCE PROBABILITIES...
CHANCE OF FALLING BELOW STAGES
AT SPECIFIC LOCATIONS
VALID PERIOD: 12/31/2012 - 3/31/2013
LOCATION 95% 90% 75% 50% 25% 10% 5%
-------- ------ ------ ------ ------ ------ ------ ------
:HART DITCH
DYER 2.0 2.0 2.0 2.0 2.0 1.9 1.9
:THORN CREEK
THORNTON 2.7 2.7 2.7 2.7 2.7 2.7 2.7
:LITTLE CALUMET RIVER
MUNSTER 5.2 5.2 5.1 5.1 5.0 5.0 5.0
SOUTH HOLLAND 5.0 5.0 5.0 4.9 4.9 4.9 4.8
:KANKAKEE RIVER
DUNNS BRIDGE 2.1 2.1 2.1 2.0 1.9 1.8 1.8
KOUTS 3.2 3.2 3.2 3.1 3.0 3.0 2.9
SHELBY 3.6 3.6 3.5 3.5 3.4 3.2 3.2
MOMENCE 1.2 1.2 1.2 1.1 1.1 1.0 1.0
:IROQUOIS RIVER
RENSSELAER 3.3 3.3 3.3 3.2 3.2 3.1 3.1
FORESMAN 4.5 4.5 4.5 4.4 4.3 4.2 4.2
IROQUOIS 3.8 3.8 3.8 3.7 3.6 3.5 3.5
:SUGAR CREEK
MILFORD 2.8 2.8 2.8 2.7 2.7 2.6 2.6
:IROQUOIS RIVER
CHEBANSE 2.5 2.5 2.5 2.5 2.4 2.3 2.3
:KANKAKEE RIVER
WILMINGTON 0.8 0.8 0.8 0.8 0.8 0.7 0.7
:DES PLAINES RIVER
RUSSELL 2.4 2.4 2.4 2.3 2.3 2.3 2.3
GURNEE 1.4 1.4 1.3 1.3 1.2 1.2 1.1
LINCOLNSHIRE 5.8 5.8 5.8 5.7 5.6 5.6 5.6
DES PLAINES 0.8 0.8 0.8 0.8 0.7 0.7 0.7
RIVERSIDE 1.9 1.9 1.9 1.9 1.8 1.8 1.7
LEMONT 5.1 5.1 5.0 4.8 4.6 4.4 4.3
:W BR DU PAGE RIVER
WARRENVILLE 7.3 7.3 7.3 7.3 7.2 7.2 7.2
:EAST BRANCH DU PAGE RIVER
BOLINGBROOK 14.7 14.7 14.7 14.7 14.7 14.6 14.6
:DU PAGE RIVER
SHOREWOOD 2.0 2.0 2.0 2.0 2.0 2.0 2.0
:MAZON RIVER
COAL CITY 1.1 1.1 0.9 0.6 0.5 0.5 0.5
:FOX RIVER
ALGONQUIN TAILWAT 4.4 4.3 4.2 4.0 3.4 3.3 3.3
MONTGOMERY 11.0 11.0 10.9 10.8 10.8 10.7 10.6
DAYTON 5.0 5.0 5.0 4.8 4.8 4.6 4.5
:VERMILION RIVER
PONTIAC 2.6 2.6 2.6 2.6 2.6 2.5 2.5
LEONORE 3.1 3.0 3.0 3.0 3.0 2.9 2.9
:PECATONICA RIVER
SHIRLAND 2.5 2.5 2.5 2.3 2.1 2.0 1.9
:ROCK RIVER
ROCKTON 2.2 2.1 2.1 2.1 2.0 1.9 1.9
LATHAM PARK 3.2 3.2 3.1 3.1 3.0 3.0 2.9
ROCKFORD 1.9 1.9 1.9 1.9 1.8 1.7 1.7
:KISHWAUKEE RIVER
BELVIDERE 0.9 0.9 0.9 0.9 0.8 0.8 0.8
:SOUTH BRANCH KISHWAUKEE RIVER
DE KALB 2.7 2.7 2.7 2.7 2.7 2.6 2.6
:KISHWAUKEE RIVER
PERRYVILLE 5.1 5.1 5.1 5.0 5.0 5.0 5.0
:ROCK RIVER
BYRON 4.5 4.5 4.5 4.4 4.4 4.3 4.3
DIXON 7.0 7.0 6.9 6.9 6.8 6.7 6.7
:NORTH BRANCH CHICAGO RIVER
CHICAGO ALBANY AV 0.9 0.9 0.9 0.9 0.9 0.9 0.9
:ILLINOIS RIVER
MORRIS 4.6 4.6 4.6 4.6 4.6 4.6 4.6
OTTAWA 458.5 458.5 458.5 458.5 458.5 458.5 458.5
LA SALLE 10.6 10.6 10.6 10.6 10.6 10.6 10.6
THESE LONG-RANGE PROBABILISTIC OUTLOOKS CONTAIN FORECAST VALUES THAT
ARE CALCULATED USING MULTIPLE SEASON SCENARIOS FROM 30 OR MORE YEARS
OF CLIMATOLOGICAL DATA...INCLUDING CURRENT CONDITIONS OF THE
RIVER...SOIL MOISTURE...SNOW COVER...AND 30 TO 90 DAY LONG-RANGE
OUTLOOKS OF TEMPERATURE AND PRECIPITATION. BY PROVIDING A RANGE OF
PROBABILITIES...THE LEVEL OF RISK ASSOCIATED WITH LONG-RANGE PLANNING
DECISIONS CAN BE DETERMINED. THESE PROBABILISTIC FORECASTS ARE PART
OF THE NATIONAL WEATHER SERVICE'S ADVANCED HYDROLOGIC PREDICTION
SERVICE.
VISIT OUR WEB SITE WEATHER.GOV/LOT FOR MORE WEATHER AND WATER
INFORMATION.
THESE MONTHLY OUTLOOKS ARE TYPICALLY ISSUED DURING THE THIRD OR
FOURTH WEEK OF THE MONTH.
Sunday, December 23, 2012
Special Weather Statement 19:09:28.6827832
THERE IS A POTENTIAL FOR UP TO THREE PERIODS OF ACCUMULATING SNOW
OVER THE NEXT 3-4 DAYS ACROSS THE AREA...
SNOW #1
WHERE... MAINLY NORTH CENTRAL AND NORTHEAST ILLINOIS ALONG AND NORTH
OF I-88 AND THE EISENHOWER EXPRESSWAY.
WHEN... MONDAY DAYTIME.
HOW MUCH NOTHING TO A DUSTING UP TO A HALF INCH
SNOW #2
WHERE... CHICAGO - NORTH SHORE - LAKE COUNTY ILLINOIS
WHEN... CHRISTMAS DAY AND EVENING.
HOW MUCH AN INCH OR TWO POSSIBLE... LOCALLY UP TO 3 BUT MOST WILL
SEE LESS.
SNOW #3
WHERE... MAINLY ALONG AND SOUTHEAST OF I-55...AND... CHICAGO -
NORTH SHORE - LAKE COUNTY ILLINOIS.
WHEN... LATE TUESDAY NIGHT AND WEDNESDAY.
HOW MUCH POTENTIAL FOR SEVERAL INCHES.
SNOW #3 WILL TRANSITION TO A LAKE EFFECT SNOW EVENT FOR NORTHWEST
INDIANA WEDNESDAY NIGHT... BRINGING ADDITIONAL SNOWFALL TO THAT
REGION.
IN ADDITION TO SNOW... INCREASING WINDS WILL CAUSE BLOWING AND
DRIFTING SNOW... ESPECIALLY IN AREAS THAT EXPERIENCE SNOW TUESDAY
AND WEDNESDAY INTO WEDNESDAY NIGHT. HOLIDAY AND POST HOLIDAY
TRAVELERS ARE ADVISED TO MONITOR LATER FORECASTS FOR UPDATES AND
POSSIBLE WARNINGS AND ADVISORIES.
OVER THE NEXT 3-4 DAYS ACROSS THE AREA...
SNOW #1
WHERE... MAINLY NORTH CENTRAL AND NORTHEAST ILLINOIS ALONG AND NORTH
OF I-88 AND THE EISENHOWER EXPRESSWAY.
WHEN... MONDAY DAYTIME.
HOW MUCH NOTHING TO A DUSTING UP TO A HALF INCH
SNOW #2
WHERE... CHICAGO - NORTH SHORE - LAKE COUNTY ILLINOIS
WHEN... CHRISTMAS DAY AND EVENING.
HOW MUCH AN INCH OR TWO POSSIBLE... LOCALLY UP TO 3 BUT MOST WILL
SEE LESS.
SNOW #3
WHERE... MAINLY ALONG AND SOUTHEAST OF I-55...AND... CHICAGO -
NORTH SHORE - LAKE COUNTY ILLINOIS.
WHEN... LATE TUESDAY NIGHT AND WEDNESDAY.
HOW MUCH POTENTIAL FOR SEVERAL INCHES.
SNOW #3 WILL TRANSITION TO A LAKE EFFECT SNOW EVENT FOR NORTHWEST
INDIANA WEDNESDAY NIGHT... BRINGING ADDITIONAL SNOWFALL TO THAT
REGION.
IN ADDITION TO SNOW... INCREASING WINDS WILL CAUSE BLOWING AND
DRIFTING SNOW... ESPECIALLY IN AREAS THAT EXPERIENCE SNOW TUESDAY
AND WEDNESDAY INTO WEDNESDAY NIGHT. HOLIDAY AND POST HOLIDAY
TRAVELERS ARE ADVISED TO MONITOR LATER FORECASTS FOR UPDATES AND
POSSIBLE WARNINGS AND ADVISORIES.
Special Weather Statement 17:02:06.6071273
THERE IS A POTENTIAL FOR UP TO THREE PERIODS OF ACCUMULATING SNOW
OVER THE NEXT 3-4 DAYS ACROSS THE AREA...
SNOW #1
WHERE... MAINLY NORTH CENTRAL AND NORTHEAST ILLINOIS ALONG AND NORTH
OF I-88 AND THE EISENHOWER EXPRESSWAY.
WHEN... MONDAY DAYTIME.
HOW MUCH NOTHING TO A DUSTING UP TO A HALF INCH
SNOW #2
WHERE... CHICAGO - NORTH SHORE - LAKE COUNTY ILLINOIS
WHEN... CHRISTMAS DAY AND EVENING.
HOW MUCH AN INCH OR TWO POSSIBLE... LOCALLY UP TO 3 BUT MOST WILL
SEE LESS.
SNOW #3
WHERE... MAINLY ALONG AND SOUTHEAST OF I-55...AND... CHICAGO -
NORTH SHORE - LAKE COUNTY ILLINOIS.
WHEN... LATE TUESDAY NIGHT AND WEDNESDAY.
HOW MUCH POTENTIAL FOR SEVERAL INCHES.
SNOW #3 WILL TRANSITION TO A LAKE EFFECT SNOW EVENT FOR NORTHWEST
INDIANA WEDNESDAY NIGHT... BRINGING ADDITIONAL SNOWFALL TO THAT
REGION.
IN ADDITION TO SNOW... INCREASING WINDS WILL CAUSE BLOWING AND
DRIFTING SNOW... ESPECIALLY IN AREAS THAT EXPERIENCE SNOW TUESDAY
AND WEDNESDAY INTO WEDNESDAY NIGHT. HOLIDAY AND POST HOLIDAY
TRAVELERS ARE ADVISED TO MONITOR LATER FORECASTS FOR UPDATES AND
POSSIBLE WARNINGS AND ADVISORIES.
OVER THE NEXT 3-4 DAYS ACROSS THE AREA...
SNOW #1
WHERE... MAINLY NORTH CENTRAL AND NORTHEAST ILLINOIS ALONG AND NORTH
OF I-88 AND THE EISENHOWER EXPRESSWAY.
WHEN... MONDAY DAYTIME.
HOW MUCH NOTHING TO A DUSTING UP TO A HALF INCH
SNOW #2
WHERE... CHICAGO - NORTH SHORE - LAKE COUNTY ILLINOIS
WHEN... CHRISTMAS DAY AND EVENING.
HOW MUCH AN INCH OR TWO POSSIBLE... LOCALLY UP TO 3 BUT MOST WILL
SEE LESS.
SNOW #3
WHERE... MAINLY ALONG AND SOUTHEAST OF I-55...AND... CHICAGO -
NORTH SHORE - LAKE COUNTY ILLINOIS.
WHEN... LATE TUESDAY NIGHT AND WEDNESDAY.
HOW MUCH POTENTIAL FOR SEVERAL INCHES.
SNOW #3 WILL TRANSITION TO A LAKE EFFECT SNOW EVENT FOR NORTHWEST
INDIANA WEDNESDAY NIGHT... BRINGING ADDITIONAL SNOWFALL TO THAT
REGION.
IN ADDITION TO SNOW... INCREASING WINDS WILL CAUSE BLOWING AND
DRIFTING SNOW... ESPECIALLY IN AREAS THAT EXPERIENCE SNOW TUESDAY
AND WEDNESDAY INTO WEDNESDAY NIGHT. HOLIDAY AND POST HOLIDAY
TRAVELERS ARE ADVISED TO MONITOR LATER FORECASTS FOR UPDATES AND
POSSIBLE WARNINGS AND ADVISORIES.
Special Weather Statement 16:16:31.5800508
THERE IS A POTENTIAL FOR UP TO THREE PERIODS OF ACCUMULATING SNOW
OVER THE NEXT 3-4 DAYS ACROSS THE AREA...
SNOW #1
WHERE... MAINLY NORTH CENTRAL AND NORTHEAST ILLINOIS ALONG/NORTH
OF I-88 AND THE EISENHOWER EXPRESSWAY.
WHEN... MONDAY DAYTIME.
HOW MUCH NOTHING TO A DUSTING UP TO A HALF INCH
SNOW #2
WHERE... CHICAGO - NORTH SHORE - LAKE COUNTY ILLINOIS
WHEN... CHRISTMAS DAY AND EVENING.
HOW MUCH AN INCH OR TWO POSSIBLE... LOCALLY UP TO 3 BUT MOST WILL
SEE LESS.
SNOW #3
WHERE... MAINLY ALONG AND SOUTHEAST OF I-55...AND... CHICAGO -
NORTH SHORE - LAKE COUNTY ILLINOIS.
WHEN... LATE TUESDAY NIGHT AND WEDNESDAY.
HOW MUCH POTENTIAL FOR SEVERAL INCHES.
SNOW #3 WILL TRANSITION TO A LAKE EFFECT SNOW EVENT FOR NORTHWEST
INDIANA WEDNESDAY NIGHT... BRINGING ADDITIONAL SNOWFALL TO THAT
REGION.
IN ADDITION TO SNOW... INCREASING WINDS WILL CAUSE BLOWING AND
DRIFTING SNOW... ESPECIALLY IN AREAS THAT EXPERIENCE SNOW TUESDAY
AND WEDNESDAY INTO WEDNESDAY NIGHT. HOLIDAY AND POST HOLIDAY
TRAVELERS ARE ADVISED TO MONITOR LATER FORECASTS FOR UPDATES AND
POSSIBLE WARNINGS AND ADVISORIES.
OVER THE NEXT 3-4 DAYS ACROSS THE AREA...
SNOW #1
WHERE... MAINLY NORTH CENTRAL AND NORTHEAST ILLINOIS ALONG/NORTH
OF I-88 AND THE EISENHOWER EXPRESSWAY.
WHEN... MONDAY DAYTIME.
HOW MUCH NOTHING TO A DUSTING UP TO A HALF INCH
SNOW #2
WHERE... CHICAGO - NORTH SHORE - LAKE COUNTY ILLINOIS
WHEN... CHRISTMAS DAY AND EVENING.
HOW MUCH AN INCH OR TWO POSSIBLE... LOCALLY UP TO 3 BUT MOST WILL
SEE LESS.
SNOW #3
WHERE... MAINLY ALONG AND SOUTHEAST OF I-55...AND... CHICAGO -
NORTH SHORE - LAKE COUNTY ILLINOIS.
WHEN... LATE TUESDAY NIGHT AND WEDNESDAY.
HOW MUCH POTENTIAL FOR SEVERAL INCHES.
SNOW #3 WILL TRANSITION TO A LAKE EFFECT SNOW EVENT FOR NORTHWEST
INDIANA WEDNESDAY NIGHT... BRINGING ADDITIONAL SNOWFALL TO THAT
REGION.
IN ADDITION TO SNOW... INCREASING WINDS WILL CAUSE BLOWING AND
DRIFTING SNOW... ESPECIALLY IN AREAS THAT EXPERIENCE SNOW TUESDAY
AND WEDNESDAY INTO WEDNESDAY NIGHT. HOLIDAY AND POST HOLIDAY
TRAVELERS ARE ADVISED TO MONITOR LATER FORECASTS FOR UPDATES AND
POSSIBLE WARNINGS AND ADVISORIES.
Special Weather Statement 16:15:53.5796747
THERE IS A POTENTIAL FOR UP TO THREE PERIODS OF ACCUMULATING SNOW
OVER THE NEXT 3-4 DAYS ACROSS THE AREA...
SNOW #1
WHERE... MAINLY NORTH CENTRAL AND NORTHEAST ILLINOIS ALONG/NORTH
OF I-88 AND THE EISENHOWER EXPRESSWAY.
WHEN... MONDAY DAYTIME.
HOW MUCH NOTHING TO A DUSTING UP TO A HALF INCH
SNOW #2
WHERE... CHICAGO - NORTH SHORE - LAKE COUNTY ILLINOIS
WHEN... CHRISTMAS DAY AND EVENING.
HOW MUCH AN INCH OR TWO POSSIBLE... LOCALLY UP TO 3 BUT MOST WILL
SEE LESS.
SNOW #3
WHERE... MAINLY ALONG AND SOUTHEAST OF I-55...AND... CHICAGO -
NORTH SHORE - LAKE COUNTY ILLINOIS.
WHEN... LATE TUESDAY NIGHT AND WEDNESDAY.
HOW MUCH POTENTIAL FOR SEVERAL INCHES.
SNOW #3 WILL TRANSITION TO A LAKE EFFECT SNOW EVENT FOR NORTHWEST
INDIANA WEDNESDAY NIGHT... BRINGING ADDITIONAL SNOWFALL TO THAT
REGION.
IN ADDITION TO SNOW... INCREASING WINDS WILL CAUSE BLOWING AND
DRIFTING SNOW... ESPECIALLY IN AREAS THAT EXPERIENCE SNOW TUESDAY
AND WEDNESDAY INTO WEDNESDAY NIGHT. HOLIDAY AND POST HOLIDAY
TRAVELERS ARE ADVISED TO MONITOR LATER FORECASTS FOR UPDATES AND
POSSIBLE WARNINGS AND ADVISORIES.
OVER THE NEXT 3-4 DAYS ACROSS THE AREA...
SNOW #1
WHERE... MAINLY NORTH CENTRAL AND NORTHEAST ILLINOIS ALONG/NORTH
OF I-88 AND THE EISENHOWER EXPRESSWAY.
WHEN... MONDAY DAYTIME.
HOW MUCH NOTHING TO A DUSTING UP TO A HALF INCH
SNOW #2
WHERE... CHICAGO - NORTH SHORE - LAKE COUNTY ILLINOIS
WHEN... CHRISTMAS DAY AND EVENING.
HOW MUCH AN INCH OR TWO POSSIBLE... LOCALLY UP TO 3 BUT MOST WILL
SEE LESS.
SNOW #3
WHERE... MAINLY ALONG AND SOUTHEAST OF I-55...AND... CHICAGO -
NORTH SHORE - LAKE COUNTY ILLINOIS.
WHEN... LATE TUESDAY NIGHT AND WEDNESDAY.
HOW MUCH POTENTIAL FOR SEVERAL INCHES.
SNOW #3 WILL TRANSITION TO A LAKE EFFECT SNOW EVENT FOR NORTHWEST
INDIANA WEDNESDAY NIGHT... BRINGING ADDITIONAL SNOWFALL TO THAT
REGION.
IN ADDITION TO SNOW... INCREASING WINDS WILL CAUSE BLOWING AND
DRIFTING SNOW... ESPECIALLY IN AREAS THAT EXPERIENCE SNOW TUESDAY
AND WEDNESDAY INTO WEDNESDAY NIGHT. HOLIDAY AND POST HOLIDAY
TRAVELERS ARE ADVISED TO MONITOR LATER FORECASTS FOR UPDATES AND
POSSIBLE WARNINGS AND ADVISORIES.
Thursday, December 20, 2012
Winter Storm Warning 23:53:57.8517663
...WINTER STORM WARNING WILL EXPIRE AT MIDNIGHT CST TONIGHT...
LIGHT SNOW WILL TAPER OFF EARLY TONIGHT. SOME ISOLATED BLOWING
SNOW WILL CONTINUE WHERE BETTER ACCUMULATIONS OCCURRED.
LIGHT SNOW WILL TAPER OFF EARLY TONIGHT. SOME ISOLATED BLOWING
SNOW WILL CONTINUE WHERE BETTER ACCUMULATIONS OCCURRED.
Winter Storm Warning 19:30:29.6952671
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT...
* TIMING...LIGHT SNOW WILL CONTINUE THROUGH MID EVENING BEFORE
SNOW INTENSITY INCREASES FROM MID EVENING THROUGH ABOUT
MIDNIGHT. NORTHWEST WINDS WILL STEADILY INCREASE THROUGH THE
EVENING.
* SNOW ACCUMULATION: AN ADDITIONAL ACCUMULATION OF 1 TO PERHAPS 2
INCHES IS POSSIBLE THROUGH LATE EVENING. TOTAL SNOW AMOUNTS OF 1
TO POSSIBLY 4 INCHES ARE EXPECTED.
* WIND: NORTHWEST WINDS WILL INCREASE TO 30 TO 40 MPH THIS EVENING
WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED TO DEVELOP.
* IMPACTS...THE STRONG WINDS WILL PRODUCE BLOWING AND DRIFTING
SNOW AS WELL AS REDUCED VISIBILITY BELOW 1 MILE MAKING TRAVEL
TREACHEROUS. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE
AND SPORADIC POWER OUTAGES. STRONG WINDS GUSTING OVER 40 MPH
WILL CONTINUE THROUGH EARLY FRIDAY...RESULTING IN CONTINUED
BLOWING AND DRIFTING SNOW. WIND CHILL VALUES WILL PLUMMET TO
NEAR ZERO BY EARLY FRIDAY MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
TONIGHT...
* TIMING...LIGHT SNOW WILL CONTINUE THROUGH MID EVENING BEFORE
SNOW INTENSITY INCREASES FROM MID EVENING THROUGH ABOUT
MIDNIGHT. NORTHWEST WINDS WILL STEADILY INCREASE THROUGH THE
EVENING.
* SNOW ACCUMULATION: AN ADDITIONAL ACCUMULATION OF 1 TO PERHAPS 2
INCHES IS POSSIBLE THROUGH LATE EVENING. TOTAL SNOW AMOUNTS OF 1
TO POSSIBLY 4 INCHES ARE EXPECTED.
* WIND: NORTHWEST WINDS WILL INCREASE TO 30 TO 40 MPH THIS EVENING
WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED TO DEVELOP.
* IMPACTS...THE STRONG WINDS WILL PRODUCE BLOWING AND DRIFTING
SNOW AS WELL AS REDUCED VISIBILITY BELOW 1 MILE MAKING TRAVEL
TREACHEROUS. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE
AND SPORADIC POWER OUTAGES. STRONG WINDS GUSTING OVER 40 MPH
WILL CONTINUE THROUGH EARLY FRIDAY...RESULTING IN CONTINUED
BLOWING AND DRIFTING SNOW. WIND CHILL VALUES WILL PLUMMET TO
NEAR ZERO BY EARLY FRIDAY MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
Winter Storm Warning 14:47:20.5270760
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT...
* TIMING...RAIN WILL CHANGE TO SNOW DURING THE LATE AFTERNOON
HOURS...AND WILL LIKELY BE HEAVY AT TIMES. LESS INTENSE SNOW
WILL LINGER THROUGH THE NIGHT. VERY STRONG WINDS WILL DEVELOP AS
SNOW ARRIVES AND CONTINUE OVERNIGHT.
* SNOW ACCUMULATION: TOTALS OF 3 TO 7 INCHES ARE LIKELY. LOCALLY
HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW
OCCUR. SNOWFALL RATES IN EXCESS OF 1 TO 2 INCHES PER HOUR ARE
POSSIBLE.
* WIND: NORTHWEST WINDS TO 30 TO 40 MPH WILL CONTINUE THROUGH THE
NIGHT WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED.
* IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY
STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND
POSSIBLY NEAR BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY
DANGEROUS IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP
UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR
DAMAGE AND SPORADIC POWER OUTAGES. STRONG WINDS GUSTING OVER 40
MPH WILL CONTINUE THROUGH EARLY FRIDAY...RESULTING IN CONTINUED
BLOWING AND DRIFTING SNOW. WIND CHILL VALUES WILL PLUMMET TO
NEAR ZERO BY EARLY FRIDAY MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
TONIGHT...
* TIMING...RAIN WILL CHANGE TO SNOW DURING THE LATE AFTERNOON
HOURS...AND WILL LIKELY BE HEAVY AT TIMES. LESS INTENSE SNOW
WILL LINGER THROUGH THE NIGHT. VERY STRONG WINDS WILL DEVELOP AS
SNOW ARRIVES AND CONTINUE OVERNIGHT.
* SNOW ACCUMULATION: TOTALS OF 3 TO 7 INCHES ARE LIKELY. LOCALLY
HIGHER AMOUNTS ARE POSSIBLE IF HEAVY SNOW BANDS WITH THUNDERSNOW
OCCUR. SNOWFALL RATES IN EXCESS OF 1 TO 2 INCHES PER HOUR ARE
POSSIBLE.
* WIND: NORTHWEST WINDS TO 30 TO 40 MPH WILL CONTINUE THROUGH THE
NIGHT WITH GUSTS BETWEEN 45 AND 55 MPH EXPECTED.
* IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY
STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND
POSSIBLY NEAR BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY
DANGEROUS IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP
UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR
DAMAGE AND SPORADIC POWER OUTAGES. STRONG WINDS GUSTING OVER 40
MPH WILL CONTINUE THROUGH EARLY FRIDAY...RESULTING IN CONTINUED
BLOWING AND DRIFTING SNOW. WIND CHILL VALUES WILL PLUMMET TO
NEAR ZERO BY EARLY FRIDAY MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
Winter Storm Warning 12:22:32.4410647
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT...
* TIMING...RAIN WILL CHANGE TO SNOW DURING THE MID TO LATE
AFTERNOON HOURS TODAY...AND LIKELY BE HEAVY AT TIMES. LESS
INTENSE SNOW WILL LINGER THROUGH THE NIGHT. VERY STRONG WINDS
WILL DEVELOP AS SNOW ARRIVES AND CONTINUE OVERNIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 3 TO
7 INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS IN DEKALB AND
MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY
SNOW BANDS WITH THUNDERSNOW OCCUR. SNOWFALL RATES IN EXCESS OF
1 TO 2 INCHES PER HOUR ARE POSSIBLE.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS
BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES
AND TO AROUND 60 MPH IN LASALLE COUNTY.
* IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY
STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND
POSSIBLY BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY
DANGEROUS IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP
UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN
MINOR DAMAGE AND SPORADIC POWER OUTAGES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
TONIGHT...
* TIMING...RAIN WILL CHANGE TO SNOW DURING THE MID TO LATE
AFTERNOON HOURS TODAY...AND LIKELY BE HEAVY AT TIMES. LESS
INTENSE SNOW WILL LINGER THROUGH THE NIGHT. VERY STRONG WINDS
WILL DEVELOP AS SNOW ARRIVES AND CONTINUE OVERNIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 3 TO
7 INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS IN DEKALB AND
MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY
SNOW BANDS WITH THUNDERSNOW OCCUR. SNOWFALL RATES IN EXCESS OF
1 TO 2 INCHES PER HOUR ARE POSSIBLE.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS
BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES
AND TO AROUND 60 MPH IN LASALLE COUNTY.
* IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY
STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND
POSSIBLY BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY
DANGEROUS IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP
UP WITH SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN
MINOR DAMAGE AND SPORADIC POWER OUTAGES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
Mesoscale Discussion 11:28:47.4091373
AREAS AFFECTED...CNTRL/ERN/SRN WI...FAR NERN IA...PARTS OF FAR NRN
IL...FAR SRN PART OF THE UPPER PENINSULA OF MI
CONCERNING...BLIZZARD
VALID 201728Z - 202330Z
SUMMARY...BLIZZARD CONDITIONS WILL OVERSPREAD THE AREA THIS
AFTERNOON.
DISCUSSION...FRONTOGENESIS WITHIN THE DEFORMATION ZONE OF THE LARGE
EXTRATROPICAL CYCLONE OVER THE SWRN GREAT LAKES REGION IS BEING
LOCALLY ENHANCED INVOF A SECONDARY VORT MAX NEARING THE W END OF
LAKE MICHIGAN N OF CHICAGO PER WATER VAPOR LOOPS. MODERATE TO
LOCALLY HEAVY SNOW IS ONGOING ACROSS PARTS OF CNTRL/SRN WI...AND
SNOWFALL INTENSITY WILL INCREASE AS A 985-MB SFC LOW N OF PEORIA IL
DEEPENS AND TRACKS TOWARD CHICAGO. SNOWFALL RATES OF 1-1.5 IN/HR
WILL BECOME LIKELY BY 1830-1900Z...HIGHEST SE OF A LINE FROM AROUND
GREEN BAY WI TO FAR NERN IA. CONVECTIVELY ENHANCED SNOW RATES MAY
OCCUR IN ASSOCIATION WITH NARROW ELEVATED CAPE LAYERS PER FORECAST
SOUNDINGS...WHICH MAY SUPPORT AN ISOLATED LIGHTNING STRIKE OR TWO.
NNELY TO NWLY WINDS WILL CONTINUE TO STRENGTHEN OWING TO THE
TIGHTENING SFC PRESSURE GRADIENT OVER THE WRN/NRN QUADRANTS OF THE
SFC LOW...WITH SPEEDS OF 25-35 MPH AND GUSTS REACHING 40-50 MPH
BECOMING COMMON BY 20Z. THE STRONGEST WINDS MAY...AT TIMES...LAG
SLIGHTLY TO THE W OF THE HIGHEST SNOWFALL RATES. HOWEVER...EVEN
LIGHT SNOW AND FRESHLY FALLEN SNOW WILL COMBINE WITH THE STRONG
WINDS TO CREATE BLIZZARD CONDITIONS WITH VISIBILITIES BELOW
ONE-QUARTER MILE.
..COHEN.. 12/20/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MQT...GRB...LOT...MKX...DVN...ARX...
LAT...LON 43049136 43299129 44129082 45188947 45558791 45468697
44948695 44118757 42778851 42478929 42409016 42439070
42599108 43049136
IL...FAR SRN PART OF THE UPPER PENINSULA OF MI
CONCERNING...BLIZZARD
VALID 201728Z - 202330Z
SUMMARY...BLIZZARD CONDITIONS WILL OVERSPREAD THE AREA THIS
AFTERNOON.
DISCUSSION...FRONTOGENESIS WITHIN THE DEFORMATION ZONE OF THE LARGE
EXTRATROPICAL CYCLONE OVER THE SWRN GREAT LAKES REGION IS BEING
LOCALLY ENHANCED INVOF A SECONDARY VORT MAX NEARING THE W END OF
LAKE MICHIGAN N OF CHICAGO PER WATER VAPOR LOOPS. MODERATE TO
LOCALLY HEAVY SNOW IS ONGOING ACROSS PARTS OF CNTRL/SRN WI...AND
SNOWFALL INTENSITY WILL INCREASE AS A 985-MB SFC LOW N OF PEORIA IL
DEEPENS AND TRACKS TOWARD CHICAGO. SNOWFALL RATES OF 1-1.5 IN/HR
WILL BECOME LIKELY BY 1830-1900Z...HIGHEST SE OF A LINE FROM AROUND
GREEN BAY WI TO FAR NERN IA. CONVECTIVELY ENHANCED SNOW RATES MAY
OCCUR IN ASSOCIATION WITH NARROW ELEVATED CAPE LAYERS PER FORECAST
SOUNDINGS...WHICH MAY SUPPORT AN ISOLATED LIGHTNING STRIKE OR TWO.
NNELY TO NWLY WINDS WILL CONTINUE TO STRENGTHEN OWING TO THE
TIGHTENING SFC PRESSURE GRADIENT OVER THE WRN/NRN QUADRANTS OF THE
SFC LOW...WITH SPEEDS OF 25-35 MPH AND GUSTS REACHING 40-50 MPH
BECOMING COMMON BY 20Z. THE STRONGEST WINDS MAY...AT TIMES...LAG
SLIGHTLY TO THE W OF THE HIGHEST SNOWFALL RATES. HOWEVER...EVEN
LIGHT SNOW AND FRESHLY FALLEN SNOW WILL COMBINE WITH THE STRONG
WINDS TO CREATE BLIZZARD CONDITIONS WITH VISIBILITIES BELOW
ONE-QUARTER MILE.
..COHEN.. 12/20/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MQT...GRB...LOT...MKX...DVN...ARX...
LAT...LON 43049136 43299129 44129082 45188947 45558791 45468697
44948695 44118757 42778851 42478929 42409016 42439070
42599108 43049136
Mesoscale Discussion 10:53:43.3883076
AREAS AFFECTED...FAR NERN MO...FAR ERN IA...CNTRL/NRN IL
CONCERNING...BLIZZARD
VALID 201652Z - 202245Z
SUMMARY...BLIZZARD CONDITIONS WILL OVERSPREAD AREAS ALONG AND EAST
OF THE MS RIVER LATE THIS MORNING INTO THE AFTERNOON...AS A STRONG
SFC LOW DEEPENS AND SNOWFALL INTERACTS WITH VERY STRONG WINDS.
DISCUSSION...RECENT WATER VAPOR/IR SATELLITE LOOPS DEPICT A
WELL-DEFINED COMMA HEAD STRUCTURE WITH A COMPACT VORT CENTER
APPROACHING THE MS RIVER N OF ST. LOUIS. AN ASSOCIATED 985-MB SFC
LOW IS ANALYZED JUST NW OF PEORIA AT 16Z. ENHANCED CONVECTIVE
INSTABILITY AND WEAK WAA WITHIN THE BRANCH OF THE BIFURCATED WARM
CONVEYOR BELT THAT WRAPS AROUND THE CYCLONE WILL SUPPORT BANDS OF
MODERATE TO LOCALLY HEAVY SNOW W/SW OF THE SFC LOW...WHICH IS
FORECAST TO TRACK NEWD AND REACH CHICAGO BY MID/LATE AFTERNOON.
SNOWFALL RATES OF 0.5-1 IN/HR WILL BE COMMON WITH THIS ACTIVITY. AN
ISOLATED LIGHTNING STRIKE MAY OCCUR WITH THE MOST INTENSE SNOWFALL
RATES.
THE TIGHT SFC PRESSURE GRADIENT WITHIN THE WRN SEMICIRCLE OF THE LOW
WILL FURTHER TIGHTEN AS THE LOW DEEPENS AT A RATE OF 0.5 TO 1 MB PER
HOUR. THIS IS IN RESPONSE TO ITS INTERACTION WITH A SECONDARY SUBTLE
VORT MAX NEAR THE APEX OF THE DRY SLOT CURLING INTO THE COMMA HEAD
NEAR CHICAGO. FORECAST SOUNDINGS SUGGEST 45-60 KT OF 0-1-KM MEAN
FLOW EVOLVING WITHIN THE SWRN QUADRANT OF THE LOW...WHICH WILL
LIKELY BECOME MANIFESTED AT THE SFC AS WLY TO NWLY WINDS OF 35-50
MPH WITH GUSTS REACHING 60 MPH. HIGH-RESOLUTION GUIDANCE SUGGESTS
THAT THE SPATIOTEMPORAL PHASING OF THESE WINDS WITH THE SNOW FOR 2-4
HOURS WILL OCCUR...CREATING BLIZZARD CONDITIONS WITH NEAR-ZERO
VISIBILITIES.
BLIZZARD CONDITIONS WILL LIKELY MOVE ACROSS THE MS RIVER PRIOR TO
18Z...REACHING A LINE FROM NEAR ROCKFORD TO SPRINGFIELD BY 20Z...AND
A LINE EXTENDING FROM E OF ROCKFORD TO NEAR BLOOMINGTON/NORMAL BY
22Z. INITIALLY...RAIN/SLEET MAY BRIEFLY MIX WITH THE PRECIPITATION
BEFORE A QUICK PHASE CHANGE TO SNOW OCCURS AS THE LOWER TROPOSPHERE
COOLS.
..COHEN.. 12/20/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LOT...ILX...LSX...DVN...
LAT...LON 42388998 42328872 41278834 39738847 39268919 38969009
39119109 39689159 40029154 40429147 40999125 41429092
42099043 42388998
CONCERNING...BLIZZARD
VALID 201652Z - 202245Z
SUMMARY...BLIZZARD CONDITIONS WILL OVERSPREAD AREAS ALONG AND EAST
OF THE MS RIVER LATE THIS MORNING INTO THE AFTERNOON...AS A STRONG
SFC LOW DEEPENS AND SNOWFALL INTERACTS WITH VERY STRONG WINDS.
DISCUSSION...RECENT WATER VAPOR/IR SATELLITE LOOPS DEPICT A
WELL-DEFINED COMMA HEAD STRUCTURE WITH A COMPACT VORT CENTER
APPROACHING THE MS RIVER N OF ST. LOUIS. AN ASSOCIATED 985-MB SFC
LOW IS ANALYZED JUST NW OF PEORIA AT 16Z. ENHANCED CONVECTIVE
INSTABILITY AND WEAK WAA WITHIN THE BRANCH OF THE BIFURCATED WARM
CONVEYOR BELT THAT WRAPS AROUND THE CYCLONE WILL SUPPORT BANDS OF
MODERATE TO LOCALLY HEAVY SNOW W/SW OF THE SFC LOW...WHICH IS
FORECAST TO TRACK NEWD AND REACH CHICAGO BY MID/LATE AFTERNOON.
SNOWFALL RATES OF 0.5-1 IN/HR WILL BE COMMON WITH THIS ACTIVITY. AN
ISOLATED LIGHTNING STRIKE MAY OCCUR WITH THE MOST INTENSE SNOWFALL
RATES.
THE TIGHT SFC PRESSURE GRADIENT WITHIN THE WRN SEMICIRCLE OF THE LOW
WILL FURTHER TIGHTEN AS THE LOW DEEPENS AT A RATE OF 0.5 TO 1 MB PER
HOUR. THIS IS IN RESPONSE TO ITS INTERACTION WITH A SECONDARY SUBTLE
VORT MAX NEAR THE APEX OF THE DRY SLOT CURLING INTO THE COMMA HEAD
NEAR CHICAGO. FORECAST SOUNDINGS SUGGEST 45-60 KT OF 0-1-KM MEAN
FLOW EVOLVING WITHIN THE SWRN QUADRANT OF THE LOW...WHICH WILL
LIKELY BECOME MANIFESTED AT THE SFC AS WLY TO NWLY WINDS OF 35-50
MPH WITH GUSTS REACHING 60 MPH. HIGH-RESOLUTION GUIDANCE SUGGESTS
THAT THE SPATIOTEMPORAL PHASING OF THESE WINDS WITH THE SNOW FOR 2-4
HOURS WILL OCCUR...CREATING BLIZZARD CONDITIONS WITH NEAR-ZERO
VISIBILITIES.
BLIZZARD CONDITIONS WILL LIKELY MOVE ACROSS THE MS RIVER PRIOR TO
18Z...REACHING A LINE FROM NEAR ROCKFORD TO SPRINGFIELD BY 20Z...AND
A LINE EXTENDING FROM E OF ROCKFORD TO NEAR BLOOMINGTON/NORMAL BY
22Z. INITIALLY...RAIN/SLEET MAY BRIEFLY MIX WITH THE PRECIPITATION
BEFORE A QUICK PHASE CHANGE TO SNOW OCCURS AS THE LOWER TROPOSPHERE
COOLS.
..COHEN.. 12/20/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LOT...ILX...LSX...DVN...
LAT...LON 42388998 42328872 41278834 39738847 39268919 38969009
39119109 39689159 40029154 40429147 40999125 41429092
42099043 42388998
Winter Storm Warning 03:46:49.1347291
...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 PM THIS
AFTERNOON TO MIDNIGHT CST TONIGHT...
* TIMING...RAIN WILL CHANGE TO SNOW DURING THE MID AFTERNOON HOURS
TODAY...AND LIKELY BE HEAVY AT TIMES. LESS INTENSE SNOW WILL
LINGER INTO THURSDAY NIGHT. VERY STRONG WINDS WILL DEVELOP AS
SNOW ARRIVES AND CONTINUE THURSDAY NIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 3 TO 7
INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS IN DEKALB AND
MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY
SNOW BANDS WITH THUNDERSNOW OCCUR. SNOWFALL RATES IN EXCESS OF 1
TO 2 INCHES PER HOUR ARE POSSIBLE.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS BETWEEN
45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES AND TO
AROUND 60 MPH IN LASALLE COUNTY.
* IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY
STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND
POSSIBLY BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY DANGEROUS
IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP UP WITH
SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE
AND SPORADIC POWER OUTAGES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
AFTERNOON TO MIDNIGHT CST TONIGHT...
* TIMING...RAIN WILL CHANGE TO SNOW DURING THE MID AFTERNOON HOURS
TODAY...AND LIKELY BE HEAVY AT TIMES. LESS INTENSE SNOW WILL
LINGER INTO THURSDAY NIGHT. VERY STRONG WINDS WILL DEVELOP AS
SNOW ARRIVES AND CONTINUE THURSDAY NIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 3 TO 7
INCHES ARE LIKELY...WITH THE HIGHEST AMOUNTS IN DEKALB AND
MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY
SNOW BANDS WITH THUNDERSNOW OCCUR. SNOWFALL RATES IN EXCESS OF 1
TO 2 INCHES PER HOUR ARE POSSIBLE.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 30 TO 40 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS BETWEEN
45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES AND TO
AROUND 60 MPH IN LASALLE COUNTY.
* IMPACTS...THE COMBINATION OF THE HEAVY SNOWFALL RATES AND VERY
STRONG WINDS WILL RESULT IN GREATLY REDUCED VISIBILITIES AND
POSSIBLY BLIZZARD CONDITIONS. TRAVEL WILL BECOME VERY DANGEROUS
IF NOT IMPOSSIBLE AS IT MAY BECOME DIFFICULT TO KEEP UP WITH
SNOW REMOVAL. THE STRONG WINDS MAY ALSO RESULT IN MINOR DAMAGE
AND SPORADIC POWER OUTAGES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
Wednesday, December 19, 2012
Winter Storm Warning 21:58:15.7830405
...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 PM THURSDAY TO
MIDNIGHT CST THURSDAY NIGHT...
* TIMING...RAIN WILL CHANGE TO WET SNOW BY MID TO LATE THURSDAY
AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO
THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY
AFTERNOON AND CONTINUE THURSDAY NIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO
6 INCHES ARE LIKELY...WITH THE HIGHER AMOUNTS IN DEKALB AND
MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY
SNOW BANDS WITH THUNDERSNOW OCCUR.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 40 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS UP
BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES
AND TO AROUND 60 MPH IN LASALLE COUNTY.
* IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS
WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR
BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO
BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THE STRONG WINDS
MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
MIDNIGHT CST THURSDAY NIGHT...
* TIMING...RAIN WILL CHANGE TO WET SNOW BY MID TO LATE THURSDAY
AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO
THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY
AFTERNOON AND CONTINUE THURSDAY NIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO
6 INCHES ARE LIKELY...WITH THE HIGHER AMOUNTS IN DEKALB AND
MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF HEAVY
SNOW BANDS WITH THUNDERSNOW OCCUR.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 40 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS UP
BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES
AND TO AROUND 60 MPH IN LASALLE COUNTY.
* IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS
WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR
BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO
BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THE STRONG WINDS
MAY ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
Winter Storm Warning 15:58:23.5692796
...WINTER STORM WARNING IN EFFECT FROM 3 PM THURSDAY TO MIDNIGHT
CST THURSDAY NIGHT...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM
WARNING FOR SNOW...BLOWING SNOW...AND STRONG WINDS. THE WARNING IS
IN EFFECT FROM 3 PM THURSDAY TO MIDNIGHT CST THURSDAY NIGHT. THE
WINTER STORM WATCH IS NO LONGER IN EFFECT.
* TIMING...RAIN WILL CHANGE TO WET SNOW BY MID TO LATE THURSDAY
AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO
THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY
AFTERNOON AND CONTINUE THURSDAY NIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6
INCHES ARE LIKELY...WITH THE HIGHER AMOUNTS IN DEKALB AND
MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF
HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 40 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS UP
BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES
AND TO AROUND 60 MPH IN LASALLE COUNTY.
* IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS
WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR
BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO
BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THE STRONG WINDS MAY
ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
CST THURSDAY NIGHT...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM
WARNING FOR SNOW...BLOWING SNOW...AND STRONG WINDS. THE WARNING IS
IN EFFECT FROM 3 PM THURSDAY TO MIDNIGHT CST THURSDAY NIGHT. THE
WINTER STORM WATCH IS NO LONGER IN EFFECT.
* TIMING...RAIN WILL CHANGE TO WET SNOW BY MID TO LATE THURSDAY
AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO
THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY
AFTERNOON AND CONTINUE THURSDAY NIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6
INCHES ARE LIKELY...WITH THE HIGHER AMOUNTS IN DEKALB AND
MCHENRY COUNTIES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IF
HEAVY SNOW BANDS WITH THUNDERSNOW OCCUR.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 40 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS UP
BETWEEN 45 AND 55 MPH EXPECTED IN DEKALB AND MCHENRY COUNTIES
AND TO AROUND 60 MPH IN LASALLE COUNTY.
* IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS
WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR
BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO
BECOME SNOW COVERED AND TRAVEL TREACHEROUS. THE STRONG WINDS MAY
ALSO RESULT IN MINOR DAMAGE AND SPORADIC POWER OUTAGES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR SNOW AND STRONG WINDS MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED AND WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
&&
Test Message 11:00:53.3925646
THIS IS THE WEEKLY TEST OF THE WXWARN1 ALERT SYSTEM THIS IS ONLY A TEST
Winter Storm Watch 10:42:10.3814469
...WINTER STORM WATCH NOW IN EFFECT FROM THURSDAY AFTERNOON
THROUGH LATE THURSDAY NIGHT...
* TIMING...RAIN WILL CHANGE TO WET SNOW BY LATE THURSDAY
AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO
THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY
AFTERNOON AND CONTINUE THURSDAY NIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6
INCHES ARE LIKELY.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS UP
BETWEEN 40 AND 50 MPH EXPECTED.
* IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS
WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR
BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO
BECOME SNOW COVERED AND TRAVEL TREACHEROUS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
THROUGH LATE THURSDAY NIGHT...
* TIMING...RAIN WILL CHANGE TO WET SNOW BY LATE THURSDAY
AFTERNOON...AND LIKELY BE HEAVY AT TIMES...LINGERING INTO
THURSDAY NIGHT. STRONG WINDS WILL DEVELOP LATER THURSDAY
AFTERNOON AND CONTINUE THURSDAY NIGHT.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 6
INCHES ARE LIKELY.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH
THURSDAY AFTERNOON AND CONTINUE THURSDAY NIGHT WITH GUSTS UP
BETWEEN 40 AND 50 MPH EXPECTED.
* IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS
WILL RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR
BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO
BECOME SNOW COVERED AND TRAVEL TREACHEROUS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
Winter Storm Watch 04:04:24.1451735
...WINTER STORM WATCH NOW IN EFFECT FROM THURSDAY AFTERNOON
THROUGH THURSDAY EVENING...
* TIMING...RAIN WILL CHANGE TO WET SNOW THURSDAY AFTERNOON WITH
SNOW...POSSIBLY HEAVY AT TIMES...LIKELY TO LINGER INTO THURSDAY
EVENING. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND
CONTINUE THURSDAY EVENING.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 4
INCHES ARE POSSIBLE...HOWEVER THE AMOUNTS WILL DEPEND HEAVILY
ON HOW QUICKLY THE RAIN CHANGES TO SNOW. IF THE CHANGE OVER
OCCURS EARLY ENOUGH THEN HEAVIER SNOW AMOUNTS COULD
OCCUR...CONVERSELY IF THE CHANGE OVER WERE TO BE LATER THURSDAY
THEN ACCUMULATIONS COULD END UP ON THE LOWER END OF THAT RANGE.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH
THURSDAY AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH
GUSTS UP BETWEEN 40 AND 50 MPH EXPECTED.
* IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL
RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR
BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO
BECOME SNOW COVERED AND TRAVEL TREACHEROUS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
THROUGH THURSDAY EVENING...
* TIMING...RAIN WILL CHANGE TO WET SNOW THURSDAY AFTERNOON WITH
SNOW...POSSIBLY HEAVY AT TIMES...LIKELY TO LINGER INTO THURSDAY
EVENING. STRONG WINDS WILL DEVELOP LATER THURSDAY AFTERNOON AND
CONTINUE THURSDAY EVENING.
* SNOW ACCUMULATION: CURRENT INDICATIONS ARE THAT TOTALS OF 2 TO 4
INCHES ARE POSSIBLE...HOWEVER THE AMOUNTS WILL DEPEND HEAVILY
ON HOW QUICKLY THE RAIN CHANGES TO SNOW. IF THE CHANGE OVER
OCCURS EARLY ENOUGH THEN HEAVIER SNOW AMOUNTS COULD
OCCUR...CONVERSELY IF THE CHANGE OVER WERE TO BE LATER THURSDAY
THEN ACCUMULATIONS COULD END UP ON THE LOWER END OF THAT RANGE.
* WIND: WINDS WILL BECOME NORTHWEST AND INCREASE TO 25 TO 35 MPH
THURSDAY AFTERNOON AND CONTINUE INTO THURSDAY EVENING WITH
GUSTS UP BETWEEN 40 AND 50 MPH EXPECTED.
* IMPACTS...THE COMBINATION OF THE SNOW AND VERY STRONG WINDS WILL
RESULT IN GREATLY REDUCED VISIBILITIES AND POSSIBLY NEAR
BLIZZARD CONDITIONS. FALLING TEMPERATURES WILL CAUSE ROADS TO
BECOME SNOW COVERED AND TRAVEL TREACHEROUS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
Tuesday, December 18, 2012
Winter Storm Watch 21:46:10.7758630
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY MORNING
THROUGH THURSDAY EVENING...
* TIMING...RAIN WILL MIX THEN CHANGE TO WET SNOW BY LATE MORNING
OR EARLY AFTERNOON THURSDAY. AREAS OF BLOWING AND DRIFTING SNOW
WILL CONTINUE THURSDAY EVENING AS THE SNOW TAPERS OFF. A PERIOD
OF MIX OF RAIN AND SNOW...OR POSSIBLY ALL SNOW...MAY OCCUR
WEDNESDAY NIGHT BUT ANY ACCUMULATION AT THAT TIME IS EXPECTED TO
BE LIGHT.
* IMPACTS...A COUPLE TO SEVERAL HOUR PERIOD OF POTENTIALLY HEAVY
SNOW MAY PRODUCE SNOWFALL TOTALS OF LOCALLY UP TO 6 INCHES.
VERY WINDY CONDITIONS WILL DEVELOP LATE THURSDAY AFTERNOON AND
CONTINUE THROUGH THURSDAY EVENING WITH NORTHWEST WINDS GUSTING
TO AROUND 50 MPH...WHICH WILL PRODUCE SIGNIFICANT BLOWING AND
DRIFTING SNOW AND POSSIBLY NEAR WHITE OUT CONDITIONS.
* OTHER IMPACTS...ANYONE WITH TRAVEL PLANS DURING THIS TIME
PERIOD SHOULD BE PREPARED FOR POSSIBLE DANGEROUS WINTER
CONDITIONS AS WELL AS SIGNIFICANTLY INCREASED TRAVEL TIMES.
THERE MAY ALSO BE MINOR WIND DAMAGE AND SPORADIC POWER OUTAGES
DURING THE PERIOD OF HIGHEST WINDS FROM THE LATE AFTERNOON
INTO THE EARLY EVENING. STRONG NORTHWEST WINDS GUSTING TO 35
TO 40 MPH WILL CONTINUE AFTER MIDNIGHT THURSDAY NIGHT...
CONTINUING TO CAUSE AREAS OF BLOWING AND DRIFTING SNOW.
TEMPERATURES BOTTOMING OUT IN THE MID TEENS...COMBINED WITH
THE STRONG WINDS...WILL RESULT IN WIND CHILL VALUES FALLING TO
NEAR OR BELOW ZERO BY EARLY FRIDAY MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
THROUGH THURSDAY EVENING...
* TIMING...RAIN WILL MIX THEN CHANGE TO WET SNOW BY LATE MORNING
OR EARLY AFTERNOON THURSDAY. AREAS OF BLOWING AND DRIFTING SNOW
WILL CONTINUE THURSDAY EVENING AS THE SNOW TAPERS OFF. A PERIOD
OF MIX OF RAIN AND SNOW...OR POSSIBLY ALL SNOW...MAY OCCUR
WEDNESDAY NIGHT BUT ANY ACCUMULATION AT THAT TIME IS EXPECTED TO
BE LIGHT.
* IMPACTS...A COUPLE TO SEVERAL HOUR PERIOD OF POTENTIALLY HEAVY
SNOW MAY PRODUCE SNOWFALL TOTALS OF LOCALLY UP TO 6 INCHES.
VERY WINDY CONDITIONS WILL DEVELOP LATE THURSDAY AFTERNOON AND
CONTINUE THROUGH THURSDAY EVENING WITH NORTHWEST WINDS GUSTING
TO AROUND 50 MPH...WHICH WILL PRODUCE SIGNIFICANT BLOWING AND
DRIFTING SNOW AND POSSIBLY NEAR WHITE OUT CONDITIONS.
* OTHER IMPACTS...ANYONE WITH TRAVEL PLANS DURING THIS TIME
PERIOD SHOULD BE PREPARED FOR POSSIBLE DANGEROUS WINTER
CONDITIONS AS WELL AS SIGNIFICANTLY INCREASED TRAVEL TIMES.
THERE MAY ALSO BE MINOR WIND DAMAGE AND SPORADIC POWER OUTAGES
DURING THE PERIOD OF HIGHEST WINDS FROM THE LATE AFTERNOON
INTO THE EARLY EVENING. STRONG NORTHWEST WINDS GUSTING TO 35
TO 40 MPH WILL CONTINUE AFTER MIDNIGHT THURSDAY NIGHT...
CONTINUING TO CAUSE AREAS OF BLOWING AND DRIFTING SNOW.
TEMPERATURES BOTTOMING OUT IN THE MID TEENS...COMBINED WITH
THE STRONG WINDS...WILL RESULT IN WIND CHILL VALUES FALLING TO
NEAR OR BELOW ZERO BY EARLY FRIDAY MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
Winter Storm Watch 15:56:53.5683887
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY MORNING
THROUGH THURSDAY EVENING...
* TIMING...RAIN WILL MIX THEN CHANGE TO WET SNOW BY LATE MORNING
OR EARLY AFTERNOON THURSDAY. AREAS OF BLOWING AND DRIFTING SNOW
WILL CONTINUE THURSDAY EVENING AS THE SNOW TAPERS OFF.
* IMPACTS...A COUPLE TO SEVERAL HOUR PERIOD OF POTENTIALLY HEAVY
SNOW MAY PRODUCE SNOWFALL TOTALS OF LOCALLY UP TO 6 INCHES. VERY
WINDY CONDITIONS WILL DEVELOP LATE THURSDAY AFTERNOON AND
CONTINUE THROUGH THURSDAY EVENING WITH NORTHWEST WINDS GUSTING
TO AROUND 50 MPH...WHICH WILL PRODUCE SIGNIFICANT BLOWING AND
DRIFTING SNOW AND POSSIBLY NEAR WHITE OUT CONDITIONS.
* OTHER IMPACTS...ANYONE WITH TRAVEL PLANS DURING THIS TIME PERIOD
SHOULD BE PREPARED FOR POSSIBLE DANGEROUS WINTER CONDITIONS AS
WELL AS SIGNIFICANTLY INCREASED TRAVEL TIMES. THERE MAY ALSO BE
MINOR WIND DAMAGE AND SPORADIC POWER OUTAGES DURING THE PERIOD
OF HIGHEST WINDS FROM THE LATE AFTERNOON INTO THE EARLY EVENING.
STRONG NORTHWEST WINDS GUSTING TO 35 TO 40 MPH WILL CONTINUE
AFTER MIDNIGHT THURSDAY NIGHT...CONTINUING TO CAUSE AREAS OF
BLOWING AND DRIFTING SNOW. TEMPERATURES BOTTOMING OUT IN THE
MID TEENS...COMBINED WITH THE STRONG WINDS...WILL RESULT IN WIND
CHILL VALUES FALLING TO NEAR OR BELOW ZERO BY EARLY FRIDAY
MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
THROUGH THURSDAY EVENING...
* TIMING...RAIN WILL MIX THEN CHANGE TO WET SNOW BY LATE MORNING
OR EARLY AFTERNOON THURSDAY. AREAS OF BLOWING AND DRIFTING SNOW
WILL CONTINUE THURSDAY EVENING AS THE SNOW TAPERS OFF.
* IMPACTS...A COUPLE TO SEVERAL HOUR PERIOD OF POTENTIALLY HEAVY
SNOW MAY PRODUCE SNOWFALL TOTALS OF LOCALLY UP TO 6 INCHES. VERY
WINDY CONDITIONS WILL DEVELOP LATE THURSDAY AFTERNOON AND
CONTINUE THROUGH THURSDAY EVENING WITH NORTHWEST WINDS GUSTING
TO AROUND 50 MPH...WHICH WILL PRODUCE SIGNIFICANT BLOWING AND
DRIFTING SNOW AND POSSIBLY NEAR WHITE OUT CONDITIONS.
* OTHER IMPACTS...ANYONE WITH TRAVEL PLANS DURING THIS TIME PERIOD
SHOULD BE PREPARED FOR POSSIBLE DANGEROUS WINTER CONDITIONS AS
WELL AS SIGNIFICANTLY INCREASED TRAVEL TIMES. THERE MAY ALSO BE
MINOR WIND DAMAGE AND SPORADIC POWER OUTAGES DURING THE PERIOD
OF HIGHEST WINDS FROM THE LATE AFTERNOON INTO THE EARLY EVENING.
STRONG NORTHWEST WINDS GUSTING TO 35 TO 40 MPH WILL CONTINUE
AFTER MIDNIGHT THURSDAY NIGHT...CONTINUING TO CAUSE AREAS OF
BLOWING AND DRIFTING SNOW. TEMPERATURES BOTTOMING OUT IN THE
MID TEENS...COMBINED WITH THE STRONG WINDS...WILL RESULT IN WIND
CHILL VALUES FALLING TO NEAR OR BELOW ZERO BY EARLY FRIDAY
MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
Winter Storm Watch 10:16:56.3664584
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY MORNING
THROUGH THURSDAY EVENING...
* TIMING...RAIN OR A RAIN SNOW MIX WILL DEVELOP WEDNESDAY
EVENING...CHANGING TO ALL SNOW THURSDAY MORNING...WITH SNOW
CONTINUING THROUGH THURSDAY EVENING.
* IMPACTS...PERIODS OF HEAVY SNOW MAY PRODUCE SNOWFALL TOTALS OF
LOCALLY 6 INCHES OR MORE. VERY WINDY CONDITIONS WILL DEVELOP
LATE THURSDAY MORNING AND CONTINUE THROUGH THURSDAY EVENING
WITH NORTHWEST WINDS GUSTING AS HIGH AS 45 MPH...WHICH WILL
PRODUCE SIGNIFICANT BLOWING AND DRIFTING SNOW AND POSSIBLY
NEAR WHITE OUT CONDITIONS.
* OTHER IMPACTS...ANYONE WITH TRAVEL PLANS DURING THIS TIME PERIOD
SHOULD BE PREPARED FOR POSSIBLE DANGEROUS WINTER CONDITIONS AS
WELL AS SIGNIFICANTLY INCREASED TRAVEL TIMES. STRONG NORTHWEST
WINDS GUSTING TO AROUND 35 MPH WILL CONTINUE AFTER MIDNIGHT
THURSDAY NIGHT...CONTINUING TO CAUSE AREAS OF BLOWING AND
DRIFTING SNOW AND LOCALLY REDUCED VISIBILITY. TEMPERATURES
BOTTOMING OUT IN THE MID TEENS BY EARLY FRIDAY
MORNING...COMBINED WITH THE STRONG WINDS...WILL RESULT IN WIND
CHILL VALUES FALLING TO NEAR OR JUST BELOW ZERO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
THROUGH THURSDAY EVENING...
* TIMING...RAIN OR A RAIN SNOW MIX WILL DEVELOP WEDNESDAY
EVENING...CHANGING TO ALL SNOW THURSDAY MORNING...WITH SNOW
CONTINUING THROUGH THURSDAY EVENING.
* IMPACTS...PERIODS OF HEAVY SNOW MAY PRODUCE SNOWFALL TOTALS OF
LOCALLY 6 INCHES OR MORE. VERY WINDY CONDITIONS WILL DEVELOP
LATE THURSDAY MORNING AND CONTINUE THROUGH THURSDAY EVENING
WITH NORTHWEST WINDS GUSTING AS HIGH AS 45 MPH...WHICH WILL
PRODUCE SIGNIFICANT BLOWING AND DRIFTING SNOW AND POSSIBLY
NEAR WHITE OUT CONDITIONS.
* OTHER IMPACTS...ANYONE WITH TRAVEL PLANS DURING THIS TIME PERIOD
SHOULD BE PREPARED FOR POSSIBLE DANGEROUS WINTER CONDITIONS AS
WELL AS SIGNIFICANTLY INCREASED TRAVEL TIMES. STRONG NORTHWEST
WINDS GUSTING TO AROUND 35 MPH WILL CONTINUE AFTER MIDNIGHT
THURSDAY NIGHT...CONTINUING TO CAUSE AREAS OF BLOWING AND
DRIFTING SNOW AND LOCALLY REDUCED VISIBILITY. TEMPERATURES
BOTTOMING OUT IN THE MID TEENS BY EARLY FRIDAY
MORNING...COMBINED WITH THE STRONG WINDS...WILL RESULT IN WIND
CHILL VALUES FALLING TO NEAR OR JUST BELOW ZERO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
Winter Storm Watch 04:04:21.1451438
...WINTER STORM WATCH IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM
WATCH...WHICH IS IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
EVENING.
* TIMING...SNOW IS EXPECTED TO BEGIN FALLING THURSDAY MORNING...
MOSTLY LIKELY AFTER SUNRISE...AND CONTINUE THROUGH THURSDAY
EVENING.
* IMPACTS...PERIODS OF HEAVY SNOW MAY PRODUCE SNOWFALL TOTALS OF
LOCALLY 6 INCHES OR MORE. VERY WINDY CONDITIONS WILL DEVELOP
LATE THURSDAY MORNING AND CONTINUE THROUGH THURSDAY EVENING
WITH NORTHWEST WINDS GUSTING AS HIGH AS 45 MPH...WHICH WILL
PRODUCE SIGNIFICANT BLOWING AND DRIFTING SNOW AND POSSIBLY NEAR
WHITE OUT CONDITIONS.
* OTHER IMPACTS...ANYONE WITH TRAVEL PLANS DURING THIS TIME PERIOD
SHOULD BE PREPARED FOR POSSIBLE DANGEROUS WINTER CONDITIONS AS
WELL AS SIGNIFICANTLY INCREASED TRAVEL TIMES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
THURSDAY EVENING...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM
WATCH...WHICH IS IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
EVENING.
* TIMING...SNOW IS EXPECTED TO BEGIN FALLING THURSDAY MORNING...
MOSTLY LIKELY AFTER SUNRISE...AND CONTINUE THROUGH THURSDAY
EVENING.
* IMPACTS...PERIODS OF HEAVY SNOW MAY PRODUCE SNOWFALL TOTALS OF
LOCALLY 6 INCHES OR MORE. VERY WINDY CONDITIONS WILL DEVELOP
LATE THURSDAY MORNING AND CONTINUE THROUGH THURSDAY EVENING
WITH NORTHWEST WINDS GUSTING AS HIGH AS 45 MPH...WHICH WILL
PRODUCE SIGNIFICANT BLOWING AND DRIFTING SNOW AND POSSIBLY NEAR
WHITE OUT CONDITIONS.
* OTHER IMPACTS...ANYONE WITH TRAVEL PLANS DURING THIS TIME PERIOD
SHOULD BE PREPARED FOR POSSIBLE DANGEROUS WINTER CONDITIONS AS
WELL AS SIGNIFICANTLY INCREASED TRAVEL TIMES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
&&
Monday, December 17, 2012
Special Weather Statement 19:55:28.7101072
...WINTER STORM TO IMPACT PARTS OF THE REGION WEDNESDAY NIGHT
THROUGH THURSDAY EVENING...
A RAPIDLY STRENGTHENING STORM SYSTEM WILL APPROACH THE AREA
WEDNESDAY NIGHT AND TRACK ACROSS ILLINOIS AND NORTHERN INDIANA
THURSDAY. RAIN IS EXPECTED TO DEVELOP AHEAD OF THIS
SYSTEM WEDNESDAY NIGHT...WITH SNOW POSSIBLE OVER NORTHWEST
ILLINOIS. AS THE SYSTEM MOVES NORTHEAST ACROSS THE AREA
THURSDAY...COLDER AIR IS EXPECTED TO CHANGE PRECIPITATION OVER TO
ALL SNOW ACROSS NORTH CENTRAL ILLINOIS BY MIDDAY...AND ACROSS
NORTHEAST ILLINOIS AND NORTHWEST INDIANA THURSDAY AFTERNOON. SNOW
WILL TAPER OFF FROM WEST TO EAST THURSDAY NIGHT.
THE HEAVIEST SNOW WILL LIKELY ACCUMULATE TO THE NORTHWEST OF THE
STORM TRACK. THIS WOULD SUGGEST THAT THE HEAVIEST SNOWFALL WOULD
OCCUR ACROSS EASTERN IOWA...NORTHWEST AND NORTH CENTRAL
ILLINOIS...AND WISCONSIN. HOWEVER...MUCH OF THE AREA...INCLUDING
CHICAGO...IS FAVORED TO SEE SOME ACCUMULATING SNOW BY THURSDAY
AFTERNOON INTO THE EVENING...WITH CHANGES IN THE TRACK OF THE LOW
PRESSURE SYSTEM HAVING A SIGNIFICANT INFLUENCE ON OVERALL
SNOWFALL AMOUNTS. A TRACK SOUTHEAST OF CHICAGO WOULD RESULT IN
MORE SNOW AREA WIDE...WHILE A TRACK OVER OR NORTH OF CHICAGO WOULD
RESULT IN MUCH LESS SNOWFALL.
WHILE THERE REMAINS QUITE A BIT OF UNCERTAINTY ON SNOWFALL
DURATION AND AMOUNTS...ONE ASPECT THAT LOOKS HIGHLY LIKELY IS
THAT THE WEST NORTHWEST WINDS WILL BECOME STRONG ON THURSDAY
AFTERNOON AND EVENING. GUSTS SHOULD BE UP TO 40 TO 50 MPH AND
POSSIBLY EVEN STRONGER. WHERE SNOW DOES OCCUR...THESE WIND SPEEDS
WILL LEAD TO BLOWING SNOW AND LIKELY SEVERELY REDUCED
VISIBILITIES.
ANYONE WHO PLANS ON TRAVELING ACROSS THE MIDWEST WEDNESDAY NIGHT
THROUGH THURSDAY NIGHT SHOULD BE PREPARED FOR DIFFICULT TRAVEL...
ESPECIALLY FOR AREAS WEST AND NORTH OF CHICAGO. IT IS IMPORTANT TO
MONITOR THE LATEST FORECASTS ON THIS POTENTIAL WINTER STORM. IN
ADDITION...THIS STORM MAY SIGNIFICANTLY IMPACT AIR TRAVEL THROUGH
CHICAGO OHARE AND CHICAGO MIDWAY AIRPORTS.
THROUGH THURSDAY EVENING...
A RAPIDLY STRENGTHENING STORM SYSTEM WILL APPROACH THE AREA
WEDNESDAY NIGHT AND TRACK ACROSS ILLINOIS AND NORTHERN INDIANA
THURSDAY. RAIN IS EXPECTED TO DEVELOP AHEAD OF THIS
SYSTEM WEDNESDAY NIGHT...WITH SNOW POSSIBLE OVER NORTHWEST
ILLINOIS. AS THE SYSTEM MOVES NORTHEAST ACROSS THE AREA
THURSDAY...COLDER AIR IS EXPECTED TO CHANGE PRECIPITATION OVER TO
ALL SNOW ACROSS NORTH CENTRAL ILLINOIS BY MIDDAY...AND ACROSS
NORTHEAST ILLINOIS AND NORTHWEST INDIANA THURSDAY AFTERNOON. SNOW
WILL TAPER OFF FROM WEST TO EAST THURSDAY NIGHT.
THE HEAVIEST SNOW WILL LIKELY ACCUMULATE TO THE NORTHWEST OF THE
STORM TRACK. THIS WOULD SUGGEST THAT THE HEAVIEST SNOWFALL WOULD
OCCUR ACROSS EASTERN IOWA...NORTHWEST AND NORTH CENTRAL
ILLINOIS...AND WISCONSIN. HOWEVER...MUCH OF THE AREA...INCLUDING
CHICAGO...IS FAVORED TO SEE SOME ACCUMULATING SNOW BY THURSDAY
AFTERNOON INTO THE EVENING...WITH CHANGES IN THE TRACK OF THE LOW
PRESSURE SYSTEM HAVING A SIGNIFICANT INFLUENCE ON OVERALL
SNOWFALL AMOUNTS. A TRACK SOUTHEAST OF CHICAGO WOULD RESULT IN
MORE SNOW AREA WIDE...WHILE A TRACK OVER OR NORTH OF CHICAGO WOULD
RESULT IN MUCH LESS SNOWFALL.
WHILE THERE REMAINS QUITE A BIT OF UNCERTAINTY ON SNOWFALL
DURATION AND AMOUNTS...ONE ASPECT THAT LOOKS HIGHLY LIKELY IS
THAT THE WEST NORTHWEST WINDS WILL BECOME STRONG ON THURSDAY
AFTERNOON AND EVENING. GUSTS SHOULD BE UP TO 40 TO 50 MPH AND
POSSIBLY EVEN STRONGER. WHERE SNOW DOES OCCUR...THESE WIND SPEEDS
WILL LEAD TO BLOWING SNOW AND LIKELY SEVERELY REDUCED
VISIBILITIES.
ANYONE WHO PLANS ON TRAVELING ACROSS THE MIDWEST WEDNESDAY NIGHT
THROUGH THURSDAY NIGHT SHOULD BE PREPARED FOR DIFFICULT TRAVEL...
ESPECIALLY FOR AREAS WEST AND NORTH OF CHICAGO. IT IS IMPORTANT TO
MONITOR THE LATEST FORECASTS ON THIS POTENTIAL WINTER STORM. IN
ADDITION...THIS STORM MAY SIGNIFICANTLY IMPACT AIR TRAVEL THROUGH
CHICAGO OHARE AND CHICAGO MIDWAY AIRPORTS.
Special Weather Statement 16:24:53.5850207
...WINTER STORM TO IMPACT PARTS OF THE REGION WEDNESDAY NIGHT
THROUGH THURSDAY EVENING...
A RAPIDLY STRENGTHENING STORM SYSTEM WILL APPROACH THE AREA
WEDNESDAY NIGHT AND TRACK ACROSS ILLINOIS AND NORTHERN INDIANA
THURSDAY. RAIN IS EXPECTED TO DEVELOP AHEAD OF THIS
SYSTEM WEDNESDAY NIGHT...WITH SNOW POSSIBLE OVER NORTHWEST
ILLINOIS. AS THE SYSTEM MOVES NORTHEAST ACROSS THE AREA
THURSDAY...COLDER AIR IS EXPECTED TO CHANGE PRECIPITATION OVER TO
ALL SNOW ACROSS NORTH CENTRAL ILLINOIS BY MIDDAY...AND ACROSS
NORTHEAST ILLINOIS AND NORTHWEST INDIANA THURSDAY AFTERNOON. SNOW
WILL TAPER OFF FROM WEST TO EAST THURSDAY NIGHT.
THE HEAVIEST SNOW WILL LIKELY ACCUMULATE TO THE NORTHWEST OF THE
STORM TRACK. THIS WOULD SUGGEST THAT THE HEAVIEST SNOWFALL WOULD
OCCUR ACROSS EASTERN IOWA...NORTHWEST AND NORTH CENTRAL
ILLINOIS...AND WISCONSIN. HOWEVER...MUCH OF THE AREA...INCLUDING
CHICAGO...IS FAVORED TO SEE SOME ACCUMULATING SNOW BY THURSDAY
AFTERNOON INTO THE EVENING...WITH CHANGES IN THE TRACK OF THE LOW
PRESSURE SYSTEM HAVING A SIGNIFICANT INFLUENCE ON OVERALL
SNOWFALL AMOUNTS. A TRACK SOUTHEAST OF CHICAGO WOULD RESULT IN
MORE SNOW AREA WIDE...WHILE A TRACK OVER OR NORTH OF CHICAGO WOULD
RESULT IN MUCH LESS SNOWFALL.
WHILE THERE REMAINS QUITE A BIT OF UNCERTAINTY ON SNOWFALL
DURATION AND AMOUNTS...ONE ASPECT THAT LOOKS HIGHLY LIKELY IS
THAT THE WEST NORTHWEST WINDS WILL BECOME STRONG ON THURSDAY
AFTERNOON AND EVENING. GUSTS SHOULD BE UP TO 40 TO 50 MPH AND
POSSIBLY EVEN STRONGER. WHERE SNOW DOES OCCUR...THESE WIND SPEEDS
WILL LEAD TO BLOWING SNOW AND LIKELY SEVERELY REDUCED
VISIBILITIES.
ANYONE WHO PLANS ON TRAVELING ACROSS THE MIDWEST WEDNESDAY NIGHT
THROUGH THURSDAY NIGHT SHOULD BE PREPARED FOR DIFFICULT TRAVEL...
ESPECIALLY FOR AREAS WEST AND NORTH OF CHICAGO. IT IS IMPORTANT TO
MONITOR THE LATEST FORECASTS ON THIS POTENTIAL WINTER STORM. IN
ADDITION...THIS STORM MAY SIGNIFICANTLY IMPACT AIR TRAVEL THROUGH
CHICAGO OHARE AND CHICAGO MIDWAY AIRPORTS.
THROUGH THURSDAY EVENING...
A RAPIDLY STRENGTHENING STORM SYSTEM WILL APPROACH THE AREA
WEDNESDAY NIGHT AND TRACK ACROSS ILLINOIS AND NORTHERN INDIANA
THURSDAY. RAIN IS EXPECTED TO DEVELOP AHEAD OF THIS
SYSTEM WEDNESDAY NIGHT...WITH SNOW POSSIBLE OVER NORTHWEST
ILLINOIS. AS THE SYSTEM MOVES NORTHEAST ACROSS THE AREA
THURSDAY...COLDER AIR IS EXPECTED TO CHANGE PRECIPITATION OVER TO
ALL SNOW ACROSS NORTH CENTRAL ILLINOIS BY MIDDAY...AND ACROSS
NORTHEAST ILLINOIS AND NORTHWEST INDIANA THURSDAY AFTERNOON. SNOW
WILL TAPER OFF FROM WEST TO EAST THURSDAY NIGHT.
THE HEAVIEST SNOW WILL LIKELY ACCUMULATE TO THE NORTHWEST OF THE
STORM TRACK. THIS WOULD SUGGEST THAT THE HEAVIEST SNOWFALL WOULD
OCCUR ACROSS EASTERN IOWA...NORTHWEST AND NORTH CENTRAL
ILLINOIS...AND WISCONSIN. HOWEVER...MUCH OF THE AREA...INCLUDING
CHICAGO...IS FAVORED TO SEE SOME ACCUMULATING SNOW BY THURSDAY
AFTERNOON INTO THE EVENING...WITH CHANGES IN THE TRACK OF THE LOW
PRESSURE SYSTEM HAVING A SIGNIFICANT INFLUENCE ON OVERALL
SNOWFALL AMOUNTS. A TRACK SOUTHEAST OF CHICAGO WOULD RESULT IN
MORE SNOW AREA WIDE...WHILE A TRACK OVER OR NORTH OF CHICAGO WOULD
RESULT IN MUCH LESS SNOWFALL.
WHILE THERE REMAINS QUITE A BIT OF UNCERTAINTY ON SNOWFALL
DURATION AND AMOUNTS...ONE ASPECT THAT LOOKS HIGHLY LIKELY IS
THAT THE WEST NORTHWEST WINDS WILL BECOME STRONG ON THURSDAY
AFTERNOON AND EVENING. GUSTS SHOULD BE UP TO 40 TO 50 MPH AND
POSSIBLY EVEN STRONGER. WHERE SNOW DOES OCCUR...THESE WIND SPEEDS
WILL LEAD TO BLOWING SNOW AND LIKELY SEVERELY REDUCED
VISIBILITIES.
ANYONE WHO PLANS ON TRAVELING ACROSS THE MIDWEST WEDNESDAY NIGHT
THROUGH THURSDAY NIGHT SHOULD BE PREPARED FOR DIFFICULT TRAVEL...
ESPECIALLY FOR AREAS WEST AND NORTH OF CHICAGO. IT IS IMPORTANT TO
MONITOR THE LATEST FORECASTS ON THIS POTENTIAL WINTER STORM. IN
ADDITION...THIS STORM MAY SIGNIFICANTLY IMPACT AIR TRAVEL THROUGH
CHICAGO OHARE AND CHICAGO MIDWAY AIRPORTS.
Special Weather Statement 04:56:33.1761506
...WINTER STORM TO AFFECT PARTS OF THE WESTERN GREAT LAKES REGION
WEDNESDAY NIGHT AND THURSDAY...
A POWERFUL STORM SYSTEM IS EXPECTED TO LIFT OUT OF THE SOUTHERN
PLAINS WEDNESDAY NIGHT AND TRACK ACROSS ILLINOIS AND NORTHERN
INDIANA THURSDAY. RAIN IS EXPECTED TO DEVELOP AHEAD OF THIS
SYSTEM WEDNESDAY NIGHT...WITH SNOW POSSIBLE OVER NORTHWEST
ILLINOIS. AS THE SYSTEM LIFTS NORTHEAST ACROSS THE AREA
THURSDAY... COLDER AIR WILL WRAP INTO THE STORM FROM THE
NORTHWEST...AND IS EXPECTED TO CHANGE PRECIPITATION OVER TO ALL
SNOW ACROSS NORTH CENTRAL ILLINOIS BY MIDDAY...AND ACROSS
NORTHEAST ILLINOIS AND NORTHWEST INDIANA THURSDAY AFTERNOON. SNOW
WOULD THEN TAPER OFF FROM WEST TO EAST THURSDAY NIGHT.
THE HEAVIEST SNOW IS EXPECTED TO ACCUMULATE TO THE NORTHWEST OF
THE STORM TRACK...WHICH IS CURRENTLY EXPECTED TO BE FROM NEAR
ST LOUIS MISSOURI TO CENTRAL LOWER MICHIGAN. THIS WOULD SUGGEST
THAT THE HEAVIEST SNOWFALL WOULD OCCUR ROUGHLY FROM EASTERN
IOWA...ACROSS NORTHWEST ILLINOIS INTO WISCONSIN. THE STORM SYSTEM
IS EXPECTED TO DEEPEN RAPIDLY AS IT LIFTS NORTHEAST INTO MICHIGAN
LATE THURSDAY...WHICH WILL PRODUCE VERY GUSTY NORTH TO NORTHWEST
WINDS. THIS WILL RESULT IN AREAS OF BLOWING SNOW WHERE
ACCUMULATION OCCURS THURSDAY AFTERNOON AND THURSDAY NIGHT.
ANYONE WHO PLANS ON TRAVELING ACROSS THE MIDWEST WEDNESDAY NIGHT
THROUGH THURSDAY NIGHT SHOULD BE PREPARED FOR DIFFICULT TRAVEL...
ESPECIALLY FOR AREAS WEST AND NORTH OF CHICAGO. IT IS IMPORTANT TO
MONITOR THE LATEST FORECASTS ON THIS POTENTIAL WINTER STORM. ANY
SHIFT IN THE TRACK OF THE SURFACE LOW WILL MAKE A SIGNIFICANT
DIFFERENCE AS TO WHERE HEAVY SNOW OCCURS. IN ADDITION...THIS
STORM MAY SIGNIFICANTLY IMPACT AIR TRAVEL THROUGH CHICAGO OHARE
AND CHICAGO MIDWAY AIRPORTS.
WEDNESDAY NIGHT AND THURSDAY...
A POWERFUL STORM SYSTEM IS EXPECTED TO LIFT OUT OF THE SOUTHERN
PLAINS WEDNESDAY NIGHT AND TRACK ACROSS ILLINOIS AND NORTHERN
INDIANA THURSDAY. RAIN IS EXPECTED TO DEVELOP AHEAD OF THIS
SYSTEM WEDNESDAY NIGHT...WITH SNOW POSSIBLE OVER NORTHWEST
ILLINOIS. AS THE SYSTEM LIFTS NORTHEAST ACROSS THE AREA
THURSDAY... COLDER AIR WILL WRAP INTO THE STORM FROM THE
NORTHWEST...AND IS EXPECTED TO CHANGE PRECIPITATION OVER TO ALL
SNOW ACROSS NORTH CENTRAL ILLINOIS BY MIDDAY...AND ACROSS
NORTHEAST ILLINOIS AND NORTHWEST INDIANA THURSDAY AFTERNOON. SNOW
WOULD THEN TAPER OFF FROM WEST TO EAST THURSDAY NIGHT.
THE HEAVIEST SNOW IS EXPECTED TO ACCUMULATE TO THE NORTHWEST OF
THE STORM TRACK...WHICH IS CURRENTLY EXPECTED TO BE FROM NEAR
ST LOUIS MISSOURI TO CENTRAL LOWER MICHIGAN. THIS WOULD SUGGEST
THAT THE HEAVIEST SNOWFALL WOULD OCCUR ROUGHLY FROM EASTERN
IOWA...ACROSS NORTHWEST ILLINOIS INTO WISCONSIN. THE STORM SYSTEM
IS EXPECTED TO DEEPEN RAPIDLY AS IT LIFTS NORTHEAST INTO MICHIGAN
LATE THURSDAY...WHICH WILL PRODUCE VERY GUSTY NORTH TO NORTHWEST
WINDS. THIS WILL RESULT IN AREAS OF BLOWING SNOW WHERE
ACCUMULATION OCCURS THURSDAY AFTERNOON AND THURSDAY NIGHT.
ANYONE WHO PLANS ON TRAVELING ACROSS THE MIDWEST WEDNESDAY NIGHT
THROUGH THURSDAY NIGHT SHOULD BE PREPARED FOR DIFFICULT TRAVEL...
ESPECIALLY FOR AREAS WEST AND NORTH OF CHICAGO. IT IS IMPORTANT TO
MONITOR THE LATEST FORECASTS ON THIS POTENTIAL WINTER STORM. ANY
SHIFT IN THE TRACK OF THE SURFACE LOW WILL MAKE A SIGNIFICANT
DIFFERENCE AS TO WHERE HEAVY SNOW OCCURS. IN ADDITION...THIS
STORM MAY SIGNIFICANTLY IMPACT AIR TRAVEL THROUGH CHICAGO OHARE
AND CHICAGO MIDWAY AIRPORTS.
Wednesday, December 12, 2012
Test Message 11:00:53.3925647
THIS IS THE WEEKLY TEST OF THE WXWARN1 ALERT SYSTEM THIS IS ONLY A TEST
Sunday, December 9, 2012
Special Weather Statement 15:48:01.5631218
...SNOW SHOWERS POSSIBLE MONDAY...
COLD AIR SPREADING ACROSS THE AREA BEHIND A DEVELOPING LOW
PRESSURE SYSTEM MONDAY...COMBINED WITH A PASSING UPPER LEVEL
DISTURBANCE...WILL RESULT IN SCATTERED SNOW FLURRIES AND SNOW
SHOWERS DEVELOPING DURING THE DAY MONDAY. WHILE WIDESPREAD
ACCUMULATING SNOW IS NOT ANTICIPATED...SOME LOCALIZED MINOR
ACCUMULATIONS OF PERHAPS A FEW TENTHS OF AN INCH WILL BE POSSIBLE
WITH THE HEAVIER SNOW SHOWERS. TEMPERATURES IN THE LOWER AND
MIDDLE 30S DURING THE DAY SHOULD ALLOW RELATIVELY QUICK MELTING OF
ANY SNOW ACCUMULATIONS.
COLD AIR SPREADING ACROSS THE AREA BEHIND A DEVELOPING LOW
PRESSURE SYSTEM MONDAY...COMBINED WITH A PASSING UPPER LEVEL
DISTURBANCE...WILL RESULT IN SCATTERED SNOW FLURRIES AND SNOW
SHOWERS DEVELOPING DURING THE DAY MONDAY. WHILE WIDESPREAD
ACCUMULATING SNOW IS NOT ANTICIPATED...SOME LOCALIZED MINOR
ACCUMULATIONS OF PERHAPS A FEW TENTHS OF AN INCH WILL BE POSSIBLE
WITH THE HEAVIER SNOW SHOWERS. TEMPERATURES IN THE LOWER AND
MIDDLE 30S DURING THE DAY SHOULD ALLOW RELATIVELY QUICK MELTING OF
ANY SNOW ACCUMULATIONS.
Special Weather Statement 06:04:25.2164634
PERIODS OF SNOW...MAINLY LIGHT...WILL CONTINUE ACROSS FAR
NORTHERN ILLINOIS THROUGH 800 AM. THIS SNOW MAY MIX WITH LIGHT
RAIN AT TIMES. TEMPERATURES NEAR AND JUST ABOVE THE GROUND WILL
BE TOO WARM FOR MOST OF THE SNOW TO ACCUMULATE...HOWEVER A LIGHT
DUSTING ON GRASSY SURFACES IS POSSIBLE...ESPECIALLY IN AND NORTH
OF THE ROCKFORD AND BELVIDERE AREAS.
PERSONS TRAVELING IN FAR NORTHERN ILLINOIS THROUGH DAYBREAK
SHOULD BE PREPARED TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY
SLIPPERY ROADWAYS.
NORTHERN ILLINOIS THROUGH 800 AM. THIS SNOW MAY MIX WITH LIGHT
RAIN AT TIMES. TEMPERATURES NEAR AND JUST ABOVE THE GROUND WILL
BE TOO WARM FOR MOST OF THE SNOW TO ACCUMULATE...HOWEVER A LIGHT
DUSTING ON GRASSY SURFACES IS POSSIBLE...ESPECIALLY IN AND NORTH
OF THE ROCKFORD AND BELVIDERE AREAS.
PERSONS TRAVELING IN FAR NORTHERN ILLINOIS THROUGH DAYBREAK
SHOULD BE PREPARED TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY
SLIPPERY ROADWAYS.
Special Weather Statement 04:01:25.1434014
SNOW WILL CONTINUE ACROSS FAR NORTHERN ILLINOIS THROUGH 600
AM...WITH POSSIBLY SOME LIGHT SNOW OR A RAIN AND SNOW MIX
CONTINUING IN THE TWO TO THREE HOURS AFTER SUNRISE. TEMPERATURES
NEAR AND JUST ABOVE THE GROUND WILL BE TOO WARM FOR MUCH OF THE
SNOW TO ACCUMULATE...HOWEVER A LIGHT DUSTING ON GRASSY SURFACES IS
POSSIBLE...ESPECIALLY IN AND AROUND THE ROCKFORD AND BELVIDERE
AREAS.
PERSONS TRAVELING IN FAR NORTHERN ILLINOIS THROUGH DAYBREAK
SHOULD BE PREPARED TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY
SLIPPERY ROADWAYS.
AM...WITH POSSIBLY SOME LIGHT SNOW OR A RAIN AND SNOW MIX
CONTINUING IN THE TWO TO THREE HOURS AFTER SUNRISE. TEMPERATURES
NEAR AND JUST ABOVE THE GROUND WILL BE TOO WARM FOR MUCH OF THE
SNOW TO ACCUMULATE...HOWEVER A LIGHT DUSTING ON GRASSY SURFACES IS
POSSIBLE...ESPECIALLY IN AND AROUND THE ROCKFORD AND BELVIDERE
AREAS.
PERSONS TRAVELING IN FAR NORTHERN ILLINOIS THROUGH DAYBREAK
SHOULD BE PREPARED TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY
SLIPPERY ROADWAYS.
Special Weather Statement 01:47:06.636173.3
A MIX OF RAIN AND SNOW WILL CHANGE TO MAINLY SNOW ACROSS FAR
NORTH CENTRAL AND NORTHEAST ILLINOIS THROUGH 400 AM. THE SNOW
WILL LIKELY PERSIST THROUGH 600 TO 700 AM. TEMPERATURES NEAR AND
JUST ABOVE THE GROUND WILL BE TOO WARM FOR MUCH IF ANY OF THE SNOW
TO ACCUMULATE...HOWEVER A LIGHT DUSTING ON GRASSY SURFACES IS
POSSIBLE.
PERSONS PLANNING TRAVEL IN THE PREDAWN HOURS SHOULD BE PREPARED
TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY SLIPPERY ROADWAYS.
THE MOST FAVORED AREA THROUGH 400 AM FOR SNOW IS A CORRIDOR FROM
THE BYRON AND OREGON AREAS EASTWARD NEAR ILLINOIS HIGHWAY 72 AND
INTO PORTIONS OF THE WESTERN AND NORTHERN SUBURBS...AS WELL AS
DOWNTOWN AND THE NORTH SIDE OF CHICAGO.
NORTH CENTRAL AND NORTHEAST ILLINOIS THROUGH 400 AM. THE SNOW
WILL LIKELY PERSIST THROUGH 600 TO 700 AM. TEMPERATURES NEAR AND
JUST ABOVE THE GROUND WILL BE TOO WARM FOR MUCH IF ANY OF THE SNOW
TO ACCUMULATE...HOWEVER A LIGHT DUSTING ON GRASSY SURFACES IS
POSSIBLE.
PERSONS PLANNING TRAVEL IN THE PREDAWN HOURS SHOULD BE PREPARED
TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY SLIPPERY ROADWAYS.
THE MOST FAVORED AREA THROUGH 400 AM FOR SNOW IS A CORRIDOR FROM
THE BYRON AND OREGON AREAS EASTWARD NEAR ILLINOIS HIGHWAY 72 AND
INTO PORTIONS OF THE WESTERN AND NORTHERN SUBURBS...AS WELL AS
DOWNTOWN AND THE NORTH SIDE OF CHICAGO.
Saturday, December 8, 2012
Special Weather Statement 00:04:22.25937.26
RAIN WILL GRADUALLY CHANGE TO SNOW...OR A MIX OF RAIN AND
SNOW...THROUGH 300 AM ACROSS FAR NORTHERN ILLINOIS. THE SNOW WILL
LIKELY PERSIST THROUGH AROUND 600 AM. AT FIRST...TEMPERATURES
NEAR AND JUST ABOVE THE GROUND WILL BE TOO WARM FOR MUCH IF ANY OF
THE SNOW TO ACCUMULATE. A LIGHT DUSTING ON GRASSY SURFACES IS
POSSIBLE.
PERSONS PLANNING TRAVEL IN THE PREDAWN HOURS SHOULD BE PREPARED
TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY SLIPPERY ROADWAYS.
SNOW...THROUGH 300 AM ACROSS FAR NORTHERN ILLINOIS. THE SNOW WILL
LIKELY PERSIST THROUGH AROUND 600 AM. AT FIRST...TEMPERATURES
NEAR AND JUST ABOVE THE GROUND WILL BE TOO WARM FOR MUCH IF ANY OF
THE SNOW TO ACCUMULATE. A LIGHT DUSTING ON GRASSY SURFACES IS
POSSIBLE.
PERSONS PLANNING TRAVEL IN THE PREDAWN HOURS SHOULD BE PREPARED
TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY SLIPPERY ROADWAYS.
Friday, December 7, 2012
Special Weather Statement 18:45:01.6682599
...MINOR SNOW ACCUMULATIONS POSSIBLE TONIGHT...
RAIN WILL DEVELOP THIS EVENING AND IS THEN EXPECTED TO CHANGE TO
SNOW AFTER MIDNIGHT AS COLDER AIR BEGINS TO FILTER INTO THE AREA.
AT FIRST...TEMPERATURES NEAR AND JUST ABOVE THE GROUND WILL BE TOO
WARM FOR ANY SNOW TO ACCUMULATE...BUT AS SNOW CONTINUES AND
TEMPERATURES FALL TO NEAR OR JUST BELOW FREEZING SNOW COULD BEGIN
TO ACCUMULATE. SLUSHY ACCUMULATIONS OF UP TO AN INCH ARE POSSIBLE
BY SATURDAY MORNING...PARTICULARLY ON GRASSY AND ELEVATED
SURFACES.
PERSONS PLANNING TRAVEL OVERNIGHT INTO EARLY SATURDAY MORNING
SHOULD BE PREPARED TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY
SLIPPERY ROADWAYS.
RAIN WILL DEVELOP THIS EVENING AND IS THEN EXPECTED TO CHANGE TO
SNOW AFTER MIDNIGHT AS COLDER AIR BEGINS TO FILTER INTO THE AREA.
AT FIRST...TEMPERATURES NEAR AND JUST ABOVE THE GROUND WILL BE TOO
WARM FOR ANY SNOW TO ACCUMULATE...BUT AS SNOW CONTINUES AND
TEMPERATURES FALL TO NEAR OR JUST BELOW FREEZING SNOW COULD BEGIN
TO ACCUMULATE. SLUSHY ACCUMULATIONS OF UP TO AN INCH ARE POSSIBLE
BY SATURDAY MORNING...PARTICULARLY ON GRASSY AND ELEVATED
SURFACES.
PERSONS PLANNING TRAVEL OVERNIGHT INTO EARLY SATURDAY MORNING
SHOULD BE PREPARED TO ENCOUNTER REDUCED VISIBILITIES AND POSSIBLY
SLIPPERY ROADWAYS.
Wednesday, December 5, 2012
Radar Outage Notification 19:25:30.6923069
NOUS63 KLOT 060123
FTMLOT
Message Date: Dec 06 2012 01:23:55KLOT RADAR IS BACK ONLINE. DETECTED
FTMLOT
Message Date: Dec 06 2012 01:23:55KLOT RADAR IS BACK ONLINE. DETECTED
Test Message 11:00:42.3924557
THIS IS THE WEEKLY TEST OF THE WXWARN1 ALERT SYSTEM THIS IS ONLY A TEST
Radar Outage Notification 09:39:35.3442725
NOUS63 KLOT 051538
FTMLOT
Message Date: Dec 05 2012 15:38:50KLOT Radar will be down all day today, we are doing PM's 20,25 and 30.
FTMLOT
Message Date: Dec 05 2012 15:38:50KLOT Radar will be down all day today, we are doing PM's 20,25 and 30.
Monday, December 3, 2012
Special Weather Statement 18:13:47.6497073
...SPECIAL WEATHER STATEMENT...
AT 612 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM HARVARD TO 11 MILES
SOUTHWEST OF MARENGO...MOVING EAST AT 45 MPH.
FUNNEL CLOUDS...WINDS GREATER THAN 40 MPH...BRIEF HEAVY DOWNPOURS...
ARE POSSIBLE WITH THESE STORMS.
CITIES AND TOWNS AFFECTED...
HARVARD... MARENGO... HEBRON...
WOODSTOCK... WONDER LAKE... RICHMOND...
BULL VALLEY... SUNNYSIDE... PISTAKEE HIGHLANDS...
OTHER LOCATIONS AFFECTED...
MORRAIN HILLS STATE PARK...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FUNNEL CLOUDS CAN BREIFLY TOUCH DOWN AS TORNADOES WITH WINDS TO 70
MPH. THESE STORMS HAVE EXHIBITED SOME WEAK ROTATION. ACT QUICLY AND
MOVE TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A
BASEMENT OR SMALL INTERIOR ROOM UNTIL THESE STORMS HAVE PASSED.
&&
LAT...LON 4229 8820 4222 8871 4249 8869 4250 8863
4250 8820
TIME...MOT...LOC 0012Z 251DEG 38KT 4250 8863 4218 8873
AT 612 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM HARVARD TO 11 MILES
SOUTHWEST OF MARENGO...MOVING EAST AT 45 MPH.
FUNNEL CLOUDS...WINDS GREATER THAN 40 MPH...BRIEF HEAVY DOWNPOURS...
ARE POSSIBLE WITH THESE STORMS.
CITIES AND TOWNS AFFECTED...
HARVARD... MARENGO... HEBRON...
WOODSTOCK... WONDER LAKE... RICHMOND...
BULL VALLEY... SUNNYSIDE... PISTAKEE HIGHLANDS...
OTHER LOCATIONS AFFECTED...
MORRAIN HILLS STATE PARK...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FUNNEL CLOUDS CAN BREIFLY TOUCH DOWN AS TORNADOES WITH WINDS TO 70
MPH. THESE STORMS HAVE EXHIBITED SOME WEAK ROTATION. ACT QUICLY AND
MOVE TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A
BASEMENT OR SMALL INTERIOR ROOM UNTIL THESE STORMS HAVE PASSED.
&&
LAT...LON 4229 8820 4222 8871 4249 8869 4250 8863
4250 8820
TIME...MOT...LOC 0012Z 251DEG 38KT 4250 8863 4218 8873
Special Weather Statement 17:29:20.6233040
...SPECIAL WEATHER STATEMENT...
AT 528 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM MACHESNEY PARK TO
BYRON...MOVING NORTHEAST AT 55 MPH.
FUNNEL CLOUDS...WINDS GREATER THAN 40 MPH...OCCASIONAL CLOUD TO
GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE
STORMS.
CITIES AND TOWNS AFFECTED...
ROSCOE... STILLMAN VALLEY... BYRON...
ROCKTON... SOUTH BELOIT... MACHESNEY PARK...
ROCKFORD AIRPORT... ROCKFORD... LOVES PARK...
OTHER LOCATIONS AFFECTED...
BOONE COUNTY FAIRGROUNDS...ROCK CUT STATE PARK...ROCK VALLEY
COLLEGE...ROCKFORD RIVERHAWKS BASEBALL...ROCKFORD SPEEDWAY...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FUNNEL CLOUDS CAN BREIFLY TOUCH DOWN AS TORNADOES WITH WINDS TO 70
MPH. THESE STORMS HAVE EXHIBITED SOME WEAK ROTATION. ACT QUICLY AND
MOVE TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A
BASEMENT OR SMALL INTERIOR ROOM UNTIL THESE STORMS HAVE PASSED.
&&
LAT...LON 4249 8869 4222 8871 4204 8934 4250 8909
TIME...MOT...LOC 2328Z 232DEG 49KT 4240 8903 4216 8919
AT 528 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM MACHESNEY PARK TO
BYRON...MOVING NORTHEAST AT 55 MPH.
FUNNEL CLOUDS...WINDS GREATER THAN 40 MPH...OCCASIONAL CLOUD TO
GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE
STORMS.
CITIES AND TOWNS AFFECTED...
ROSCOE... STILLMAN VALLEY... BYRON...
ROCKTON... SOUTH BELOIT... MACHESNEY PARK...
ROCKFORD AIRPORT... ROCKFORD... LOVES PARK...
OTHER LOCATIONS AFFECTED...
BOONE COUNTY FAIRGROUNDS...ROCK CUT STATE PARK...ROCK VALLEY
COLLEGE...ROCKFORD RIVERHAWKS BASEBALL...ROCKFORD SPEEDWAY...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FUNNEL CLOUDS CAN BREIFLY TOUCH DOWN AS TORNADOES WITH WINDS TO 70
MPH. THESE STORMS HAVE EXHIBITED SOME WEAK ROTATION. ACT QUICLY AND
MOVE TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A
BASEMENT OR SMALL INTERIOR ROOM UNTIL THESE STORMS HAVE PASSED.
&&
LAT...LON 4249 8869 4222 8871 4204 8934 4250 8909
TIME...MOT...LOC 2328Z 232DEG 49KT 4240 8903 4216 8919
Mesoscale Discussion 15:30:51.5529249
AREAS AFFECTED...FAR ERN IA...NRN AND W-CNTRL IL...SRN WI
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 032129Z - 032300Z
PROBABILITY OF WATCH ISSUANCE...20 PERCENT
SUMMARY...SCATTERED THUNDERSTORMS ARE FORECAST TO DEVELOP ACROSS FAR
ERN IA...NRN AND W-CNTRL IL...AND SRN WI THIS EVENING. A FEW STORMS
MAY BECOME STRONG TO SEVERE...POSING AN ISOLATED THREAT FOR DAMAGING
WIND GUSTS AND PERHAPS A BRIEF TORNADO.
DISCUSSION...WV IMAGERY AT 21Z SHOWS A VORT LOBE PROGRESSING EWD
INTO THE UPPER MS VALLEY REGION...WHILE AN ASSOCIATED SURFACE COLD
FRONT EXTENDED SWWD FROM NRN WI INTO CNTRL/ERN IA AND NRN MO. A WARM
FRONT WAS ALSO RETREATING NWD INTO CNTRL WI AND LOWER MI. DEWPOINTS
AHEAD OF THE COLD FRONT RESIDE IN THE UPPER 50S...WHILE TEMPERATURES
HAVE WARMED INTO THE 60S TO AROUND 70F. HOWEVER... STRONGER BOUNDARY
LAYER DESTABILIZATION HAS BEEN INHIBITED BY PRE-FRONTAL
STRATOCUMULUS. GIVEN ONLY MODEST SURFACE HEATING AND
MOISTURE...COMBINED WITH RATHER WEAK MIDLEVEL LAPSE RATES...SBCAPE
VALUES ONLY RANGE FROM 500-1000 J/KG.
AS THE COLD FRONT PROGRESSES EWD ACROSS THE AREA THIS
EVENING...SCATTERED THUNDERSTORMS ARE FORECAST TO DEVELOP. A MESSY
CONVECTIVE MODE...CONSISTING MAINLY OF LINE SEGMENTS...MAY UNFOLD
DUE TO WEAK BOUNDARY LAYER DESTABILIZATION AND MODEST 30-40 KT
DEEP-LAYER SHEAR. IN ADDITION...STRONGER DCVA/LARGE-SCALE FORCING
FOR ASCENT IS FORECAST TO BE N OF THE AREA...WHICH COULD OTHERWISE
COMPENSATE SOMEWHAT FOR THE LOW CAPE/MODERATE SHEAR ENVIRONMENT.
THEREFORE...EXPECT ISOLATED STRONG/SEVERE WIND GUSTS TO BE THE
PRIMARY THREAT WITH STORMS TONIGHT. IN ADDITION...A 40-50 KT S-SWLY
LLJ WILL AID IN EFFECTIVE SRH VALUES NEAR 200 M2 S-2. THUS...A BRIEF
TORNADO CANNOT BE RULED OUT.
..GARNER/MEAD.. 12/03/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...GRB...LOT...ILX...MKX...LSX...DVN...ARX...
LAT...LON 41468788 40068942 39609050 39809135 40799162 42609078
43838958 44198813 41468788
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 032129Z - 032300Z
PROBABILITY OF WATCH ISSUANCE...20 PERCENT
SUMMARY...SCATTERED THUNDERSTORMS ARE FORECAST TO DEVELOP ACROSS FAR
ERN IA...NRN AND W-CNTRL IL...AND SRN WI THIS EVENING. A FEW STORMS
MAY BECOME STRONG TO SEVERE...POSING AN ISOLATED THREAT FOR DAMAGING
WIND GUSTS AND PERHAPS A BRIEF TORNADO.
DISCUSSION...WV IMAGERY AT 21Z SHOWS A VORT LOBE PROGRESSING EWD
INTO THE UPPER MS VALLEY REGION...WHILE AN ASSOCIATED SURFACE COLD
FRONT EXTENDED SWWD FROM NRN WI INTO CNTRL/ERN IA AND NRN MO. A WARM
FRONT WAS ALSO RETREATING NWD INTO CNTRL WI AND LOWER MI. DEWPOINTS
AHEAD OF THE COLD FRONT RESIDE IN THE UPPER 50S...WHILE TEMPERATURES
HAVE WARMED INTO THE 60S TO AROUND 70F. HOWEVER... STRONGER BOUNDARY
LAYER DESTABILIZATION HAS BEEN INHIBITED BY PRE-FRONTAL
STRATOCUMULUS. GIVEN ONLY MODEST SURFACE HEATING AND
MOISTURE...COMBINED WITH RATHER WEAK MIDLEVEL LAPSE RATES...SBCAPE
VALUES ONLY RANGE FROM 500-1000 J/KG.
AS THE COLD FRONT PROGRESSES EWD ACROSS THE AREA THIS
EVENING...SCATTERED THUNDERSTORMS ARE FORECAST TO DEVELOP. A MESSY
CONVECTIVE MODE...CONSISTING MAINLY OF LINE SEGMENTS...MAY UNFOLD
DUE TO WEAK BOUNDARY LAYER DESTABILIZATION AND MODEST 30-40 KT
DEEP-LAYER SHEAR. IN ADDITION...STRONGER DCVA/LARGE-SCALE FORCING
FOR ASCENT IS FORECAST TO BE N OF THE AREA...WHICH COULD OTHERWISE
COMPENSATE SOMEWHAT FOR THE LOW CAPE/MODERATE SHEAR ENVIRONMENT.
THEREFORE...EXPECT ISOLATED STRONG/SEVERE WIND GUSTS TO BE THE
PRIMARY THREAT WITH STORMS TONIGHT. IN ADDITION...A 40-50 KT S-SWLY
LLJ WILL AID IN EFFECTIVE SRH VALUES NEAR 200 M2 S-2. THUS...A BRIEF
TORNADO CANNOT BE RULED OUT.
..GARNER/MEAD.. 12/03/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...GRB...LOT...ILX...MKX...LSX...DVN...ARX...
LAT...LON 41468788 40068942 39609050 39809135 40799162 42609078
43838958 44198813 41468788
Special Weather Statement 07:59:47.2849913
ALTHOUGH THE MORE DENSE FOG HAS LIFTED THIS MORNING...PATCHY AREAS
OF DENSE FOG WILL STILL BE POSSIBLE OVER THE NEXT ONE TO TWO
HOURS. EXPECT VISIBILITY TO RANGE FROM ONE TO THREE MILES WITH
SOME ISOLATED AREAS STILL POSSIBLY OBSERVING VISIBILITY OF ONE
HALF MILE OR LESS...PRIMARILY FOR AREAS ALONG AND NORTH OF
INTERSTATE 88. MOTORISTS SHOULD USE CAUTION AND BE ALERT FOR
RAPIDLY CHANGING VISIBILITY OVER SHORT DISTANCES.
OF DENSE FOG WILL STILL BE POSSIBLE OVER THE NEXT ONE TO TWO
HOURS. EXPECT VISIBILITY TO RANGE FROM ONE TO THREE MILES WITH
SOME ISOLATED AREAS STILL POSSIBLY OBSERVING VISIBILITY OF ONE
HALF MILE OR LESS...PRIMARILY FOR AREAS ALONG AND NORTH OF
INTERSTATE 88. MOTORISTS SHOULD USE CAUTION AND BE ALERT FOR
RAPIDLY CHANGING VISIBILITY OVER SHORT DISTANCES.
Non-Precipitation Watch, Warning, Advisory 07:58:18.2841102
...DENSE FOG ADVISORY WILL EXPIRE AT 8 AM CST /9 AM EST/ THIS
MORNING...
ALTHOUGH THE MORE DENSE FOG HAS LIFTED THIS MORNING...PATCHY AREAS
OF DENSE FOG WILL STILL BE POSSIBLE OVER THE NEXT ONE TO TWO
HOURS. EXPECT VISIBILITY TO RANGE FROM ONE TO THREE MILES WITH
SOME ISOLATED AREAS STILL POSSIBLY OBSERVING VISIBILITY OF ONE
HALF MILE OR LESS...PRIMARILY FOR AREAS ALONG AND NORTH OF
INTERSTATE 88.
MORNING...
ALTHOUGH THE MORE DENSE FOG HAS LIFTED THIS MORNING...PATCHY AREAS
OF DENSE FOG WILL STILL BE POSSIBLE OVER THE NEXT ONE TO TWO
HOURS. EXPECT VISIBILITY TO RANGE FROM ONE TO THREE MILES WITH
SOME ISOLATED AREAS STILL POSSIBLY OBSERVING VISIBILITY OF ONE
HALF MILE OR LESS...PRIMARILY FOR AREAS ALONG AND NORTH OF
INTERSTATE 88.
Non-Precipitation Watch, Warning, Advisory 03:14:57.1158003
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 8 AM CST /9 AM EST/
THIS MORNING...
* VISIBILITY...WIDESPREAD AREAS LESS THAN ONE QUARTER MILE.
* IMPACTS...DENSE FOG WILL MAKE TRAVELING BY CAR OR AIR VERY
CHALLENGING THROUGH THE MID MORNING HOURS. PERSONS WHO MUST TRAVEL
SHOULD PLAN ACCORDINGLY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.
&&
THIS MORNING...
* VISIBILITY...WIDESPREAD AREAS LESS THAN ONE QUARTER MILE.
* IMPACTS...DENSE FOG WILL MAKE TRAVELING BY CAR OR AIR VERY
CHALLENGING THROUGH THE MID MORNING HOURS. PERSONS WHO MUST TRAVEL
SHOULD PLAN ACCORDINGLY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.
&&
Sunday, December 2, 2012
Non-Precipitation Watch, Warning, Advisory 19:02:30.6786450
...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM CST /9 AM EST/
MONDAY...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL 8 AM CST /9 AM EST/ MONDAY.
* VISIBILITY...WIDESPREAD AREAS LESS THAN ONE QUARTER MILE.
* IMPACTS...DENSE FOG WILL MAKE TRAVELING BY CAR OR AIR VERY
CHALLENGING OVERNIGHT TONIGHT AND TOMORROW MORNING. PERSONS WHO
MUST TRAVEL SHOULD PLAN ACCORDINGLY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.
&&
MONDAY...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL 8 AM CST /9 AM EST/ MONDAY.
* VISIBILITY...WIDESPREAD AREAS LESS THAN ONE QUARTER MILE.
* IMPACTS...DENSE FOG WILL MAKE TRAVELING BY CAR OR AIR VERY
CHALLENGING OVERNIGHT TONIGHT AND TOMORROW MORNING. PERSONS WHO
MUST TRAVEL SHOULD PLAN ACCORDINGLY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.
&&
Saturday, December 1, 2012
Special Weather Statement 04:04:25.1451835
PATCHY DENSE FOG WILL OCCUR AT TIMES THROUGH THE EARLY MORNING
HOURS ACROSS NORTHERN ILLINOIS...PRIMARILY ALONG AND NORTH OF A
LINE FROM JOLIET TO DIXON. THE DENSE FOG WILL LEAD TO ISOLATED
VISIBILITY REDUCTIONS TO A QUARTER MILE OR LESS MAINLY IN MORE
RURAL AND LOW LYING AREAS AWAY FROM THE IMMEDIATE CHICAGO METRO
AREA. OTHERWISE...MOST AREAS WILL SEE VISIBILITY IN THE 2 TO 4 MILE
RANGE THROUGH DAYBREAK. MOTORISTS SHOULD USE CAUTION AND BE ALERT
FOR RAPIDLY CHANGING VISIBILITY OVER SHORT DISTANCES. IN
ADDITION...SLICK SPOTS MAY DEVELOP ON ROADWAYS WHERE DENSE FOG
OCCURS AS TEMPERATURES ARE RIGHT AROUND FREEZING.
HOURS ACROSS NORTHERN ILLINOIS...PRIMARILY ALONG AND NORTH OF A
LINE FROM JOLIET TO DIXON. THE DENSE FOG WILL LEAD TO ISOLATED
VISIBILITY REDUCTIONS TO A QUARTER MILE OR LESS MAINLY IN MORE
RURAL AND LOW LYING AREAS AWAY FROM THE IMMEDIATE CHICAGO METRO
AREA. OTHERWISE...MOST AREAS WILL SEE VISIBILITY IN THE 2 TO 4 MILE
RANGE THROUGH DAYBREAK. MOTORISTS SHOULD USE CAUTION AND BE ALERT
FOR RAPIDLY CHANGING VISIBILITY OVER SHORT DISTANCES. IN
ADDITION...SLICK SPOTS MAY DEVELOP ON ROADWAYS WHERE DENSE FOG
OCCURS AS TEMPERATURES ARE RIGHT AROUND FREEZING.
Special Weather Statement 02:29:54.890405.7
PATCHY DENSE FOG WILL OCCUR AT TIMES THROUGH THE EARLY MORNING
HOURS ACROSS NORTHERN ILLINOIS...PRIMARILY ALONG AND NORTH OF A
LINE FROM JOLIET TO DIXON. THE DENSE FOG WILL LEAD TO ISOLATED
VISIBILITY REDUCTIONS TO A QUARTER MILE OR LESS MAINLY IN MORE
RURAL AND LOW LYING AREAS AWAY FROM THE IMMEDIATE CHICAGO METRO
AREA. OTHERWISE...MOST AREAS WILL SEE VISIBILITY IN THE 2 TO 6 MILE
RANGE THROUGH DAYBREAK. MOTORISTS SHOULD USE CAUTION AND BE ALERT
FOR RAPIDLY CHANGING VISIBILITY OVER SHORT DISTANCES.
HOURS ACROSS NORTHERN ILLINOIS...PRIMARILY ALONG AND NORTH OF A
LINE FROM JOLIET TO DIXON. THE DENSE FOG WILL LEAD TO ISOLATED
VISIBILITY REDUCTIONS TO A QUARTER MILE OR LESS MAINLY IN MORE
RURAL AND LOW LYING AREAS AWAY FROM THE IMMEDIATE CHICAGO METRO
AREA. OTHERWISE...MOST AREAS WILL SEE VISIBILITY IN THE 2 TO 6 MILE
RANGE THROUGH DAYBREAK. MOTORISTS SHOULD USE CAUTION AND BE ALERT
FOR RAPIDLY CHANGING VISIBILITY OVER SHORT DISTANCES.
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