Thursday, September 26, 2013

Non-Precipitation Watch, Warning, Advisory 05:55:48.2113452

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL 10 AM CDT THIS MORNING.

* TIMING...AREAS OF DENSE FOG THROUGH 10 AM CDT

* VISIBILITY...A QUARTER MILE OR LESS.

* IMPACTS...SEVERELY RESTRICTED VISIBILITY IN SOME AREAS WILL
AFFECT MOTORISTS THIS MORNING.

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.

&&

Non-Precipitation Watch, Warning, Advisory 05:54:04.2103155

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL 10 AM CDT THIS MORNING.

* TIMING...AREAS OF DENSE FOG THROUGH 9 AM CDT

* VISIBILITY...A QUARTER MILE OR LESS.

* IMPACTS...SEVERELY RESTRICTED VISIBILITY IN SOME AREAS WILL
AFFECT MOTORISTS THIS MORNING.

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.

&&

Special Weather Statement 04:38:34.1654686

AREAS OF FOG WILL BE COMMON ACROSS MUCH OF NORTHERN ILLINOIS AND
NORTHWEST INDIANA EARLY THIS MORNING...WITH PATCHES OF LOCALLY
DENSE FOG POSSIBLE IN SOME AREAS. VISIBILITY MAY VARY RAPIDLY OVER
SHORT DISTANCES...FROM A FEW MILES TO LESS THAN A QUARTER MILE IN
SOME SPOTS. DENSE FOG IS MORE LIKELY ACROSS NORTHERN ILLINOIS
GENERALLY ALONG AND EAST OF THE INTERSTATE 39 CORRIDOR... AND
NORTH OF INTERSTATE 80. FOG WILL GRADUALLY BURN OFF AFTER SUNRISE
THIS MORNING...WITH VISIBILITY IMPROVING QUICKLY BY 9 AM CDT.

USE CAUTION ON YOUR MORNING COMMUTE...AND BE PREPARED FOR RAPID
CHANGES IN VISIBILITY DUE TO LOCALLY DENSE FOG PATCHES. USE YOUR
LOW BEAM HEADLIGHTS...AND BE ALERT FOR SLOWER TRAFFIC WHERE FOG
RESTRICTS VISIBILITY.

Wednesday, September 25, 2013

Flood Potential Outlook 14:46:32.5266008

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: 9/30/2013 - 12/29/2013

: 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 10 <5 <5 <5 <5
:LITTLE CALUMET RIVER
MUNSTER 12.0 14.0 17.0 : 23 25 12 14 6 7
SOUTH HOLLAND 16.5 18.0 20.0 : <5 <5 <5 <5 <5 <5
:KANKAKEE RIVER
DUNNS BRIDGE 10.0 12.0 13.0 : <5 7 <5 <5 <5 <5
KOUTS 11.0 13.0 14.0 : <5 9 <5 <5 <5 <5
SHELBY 9.0 11.0 12.5 : 21 37 <5 14 <5 <5
MOMENCE 5.0 6.5 9.0 : 6 9 <5 <5 <5 <5
:IROQUOIS RIVER
RENSSELAER 12.0 14.0 15.0 : 10 12 <5 <5 <5 <5
FORESMAN 18.0 22.0 24.0 : <5 7 <5 <5 <5 <5
IROQUOIS 18.0 24.0 25.0 : 14 23 <5 <5 <5 <5
:SUGAR CREEK
MILFORD 18.0 22.0 26.0 : 6 25 <5 <5 <5 <5
:IROQUOIS RIVER
CHEBANSE 16.0 18.0 20.0 : <5 <5 <5 <5 <5 <5
:KANKAKEE RIVER
WILMINGTON 6.5 8.0 10.0 : <5 9 <5 <5 <5 <5
:DES PLAINES RIVER
RUSSELL 7.0 9.0 10.0 : 14 26 <5 <5 <5 <5
GURNEE 7.0 9.0 11.0 : <5 <5 <5 <5 <5 <5
LINCOLNSHIRE 12.5 14.0 15.5 : <5 <5 <5 <5 <5 <5
DES PLAINES 5.0 8.0 9.0 : <5 <5 <5 <5 <5 <5
RIVERSIDE 7.0 8.0 9.0 : 6 12 <5 7 <5 <5
LEMONT 10.0 11.0 12.0 : 10 15 6 10 <5 7
:W BR DU PAGE RIVER
WARRENVILLE 11.5 14.5 17.5 : 9 10 <5 <5 <5 <5
:EAST BRANCH DU PAGE RIVER
BOLINGBROOK 19.5 21.0 23.0 : 18 23 6 7 <5 <5
:DU PAGE RIVER
SHOREWOOD 6.5 8.0 10.0 : 7 7 <5 <5 <5 <5
:MAZON RIVER
COAL CITY 12.0 14.0 17.0 : <5 9 <5 <5 <5 <5
:FOX RIVER
ALGONQUIN TAILWAT 9.5 10.5 12.0 : <5 12 <5 7 <5 <5
MONTGOMERY 13.0 14.0 15.0 : <5 9 <5 <5 <5 <5
DAYTON 12.0 14.0 24.0 : <5 9 <5 <5 <5 <5
:VERMILION RIVER
PONTIAC 14.0 15.0 18.0 : <5 <5 <5 <5 <5 <5
LEONORE 16.0 21.0 26.0 : <5 12 <5 7 <5 <5
:PECATONICA RIVER
SHIRLAND 12.0 14.0 15.5 : 7 <5 <5 <5 <5 <5
:ROCK RIVER
ROCKTON 10.0 11.0 14.0 : <5 <5 <5 <5 <5 <5
LATHAM PARK 10.0 11.0 14.0 : <5 <5 <5 <5 <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 <5 <5 <5 <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 : <5 <5 <5 <5 <5 <5
:ROCK RIVER
BYRON 13.0 14.0 16.0 : <5 <5 <5 <5 <5 <5
DIXON 16.0 18.0 20.0 : <5 <5 <5 <5 <5 <5
:NORTH BRANCH CHICAGO RIVER
CHICAGO ALBANY AV 7.0 7.5 8.0 : <5 6 <5 <5 <5 <5
:ILLINOIS RIVER
MORRIS 16.0 18.0 22.0 : 6 14 6 12 <5 <5
OTTAWA 463.0 466.0 469.0 : 6 10 6 9 <5 <5
LA SALLE 20.0 27.0 31.0 : 10 25 6 10 <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: 9/30/2013 - 12/29/2013
LOCATION 95% 90% 75% 50% 25% 10% 5%
-------- ------ ------ ------ ------ ------ ------ ------
:HART DITCH
DYER 2.8 2.9 3.3 4.0 5.3 6.5 7.1
:THORN CREEK
THORNTON 3.3 3.4 4.0 4.8 6.0 8.4 10.6
:LITTLE CALUMET RIVER
MUNSTER 7.7 8.1 9.2 10.0 12.0 14.9 18.4
SOUTH HOLLAND 7.1 7.4 8.4 9.4 10.9 12.9 14.5
:KANKAKEE RIVER
DUNNS BRIDGE 3.5 3.8 4.4 6.4 7.4 9.3 9.5
KOUTS 4.4 4.7 5.3 7.3 8.5 10.4 10.6
SHELBY 4.8 5.1 5.7 7.6 8.4 10.4 10.9
MOMENCE 1.6 1.7 1.9 2.6 3.5 4.1 5.5
:IROQUOIS RIVER
RENSSELAER 4.6 5.3 6.1 8.2 10.5 12.5 13.0
FORESMAN 6.5 7.7 8.5 11.8 14.5 17.0 18.0
IROQUOIS 5.6 6.6 7.2 11.6 15.2 19.0 22.0
:SUGAR CREEK
MILFORD 5.6 5.8 6.7 8.8 12.1 17.6 20.6
:IROQUOIS RIVER
CHEBANSE 3.5 3.6 4.1 5.6 7.6 11.1 11.7
:KANKAKEE RIVER
WILMINGTON 1.2 1.3 1.5 2.1 3.1 4.2 6.2
:DES PLAINES RIVER
RUSSELL 3.8 3.9 4.4 5.3 6.4 7.6 8.1
GURNEE 1.7 1.8 2.1 2.9 4.1 5.1 6.5
LINCOLNSHIRE 6.4 6.6 6.8 7.5 9.0 9.7 10.8
DES PLAINES 0.9 1.0 1.2 1.5 2.1 2.9 3.6
RIVERSIDE 2.3 2.7 3.0 4.1 5.3 6.7 7.4
LEMONT 5.6 6.1 6.3 7.5 8.9 10.1 11.3
:W BR DU PAGE RIVER
WARRENVILLE 8.3 8.5 9.1 9.9 10.4 11.6 12.0
:EAST BRANCH DU PAGE RIVER
BOLINGBROOK 15.9 16.3 16.9 18.1 19.2 20.5 21.5
:DU PAGE RIVER
SHOREWOOD 3.0 3.2 3.6 4.3 5.1 6.1 7.1
:MAZON RIVER
COAL CITY 1.8 1.9 3.1 4.8 6.8 8.5 11.0
:FOX RIVER
ALGONQUIN TAILWAT 5.5 5.7 6.2 7.0 8.2 9.0 9.8
MONTGOMERY 11.4 11.4 11.6 12.0 12.5 12.8 14.1
DAYTON 5.8 6.1 6.4 8.2 9.3 10.6 14.8
:VERMILION RIVER
PONTIAC 3.0 3.1 3.8 4.4 5.6 7.7 9.2
LEONORE 3.7 3.8 4.7 5.8 8.9 11.5 16.6
:PECATONICA RIVER
SHIRLAND 4.5 4.7 5.9 6.8 8.7 11.3 12.5
:ROCK RIVER
ROCKTON 3.5 3.5 3.8 4.5 5.9 8.6 9.3
LATHAM PARK 4.3 4.3 4.5 5.1 6.1 8.4 9.0
ROCKFORD 2.6 2.6 2.7 3.0 3.2 3.7 3.9
:KISHWAUKEE RIVER
BELVIDERE 1.4 1.5 2.1 3.0 4.4 6.0 7.2
:SOUTH BRANCH KISHWAUKEE RIVER
DE KALB 3.1 3.3 3.6 4.5 5.7 6.3 7.2
:KISHWAUKEE RIVER
PERRYVILLE 5.6 5.7 6.1 7.0 8.4 10.5 11.7
:ROCK RIVER
BYRON 5.5 5.5 5.9 6.7 8.5 10.4 12.4
DIXON 8.1 8.1 8.5 9.0 10.4 12.0 14.0
:NORTH BRANCH CHICAGO RIVER
CHICAGO ALBANY AV 2.7 2.9 3.2 3.9 4.7 5.6 6.6
:ILLINOIS RIVER
MORRIS 5.1 5.2 5.6 7.2 9.2 12.2 19.2
OTTAWA 458.5 458.5 458.7 459.0 459.4 461.1 467.8
LA SALLE 11.2 11.3 12.0 13.5 16.3 21.0 28.2

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: 9/30/2013 - 12/29/2013
LOCATION 95% 90% 75% 50% 25% 10% 5%
-------- ------ ------ ------ ------ ------ ------ ------
:HART DITCH
DYER 1.8 1.8 1.7 1.7 1.7 1.7 1.6
:THORN CREEK
THORNTON 2.7 2.7 2.7 2.7 2.7 2.7 2.6
:LITTLE CALUMET RIVER
MUNSTER 4.9 4.9 4.8 4.7 4.7 4.5 4.5
SOUTH HOLLAND 4.9 4.9 4.9 4.9 4.8 4.8 4.8
:KANKAKEE RIVER
DUNNS BRIDGE 2.7 2.7 2.4 2.3 2.2 2.1 2.1
KOUTS 3.6 3.6 3.3 3.2 3.1 3.0 3.0
SHELBY 4.2 4.1 3.8 3.7 3.6 3.5 3.5
MOMENCE 1.4 1.4 1.3 1.2 1.2 1.2 1.2
:IROQUOIS RIVER
RENSSELAER 3.5 3.5 3.4 3.3 3.2 3.2 3.2
FORESMAN 5.1 5.0 4.9 4.8 4.7 4.6 4.6
IROQUOIS 4.4 4.3 4.2 4.0 4.0 3.9 3.9
:SUGAR CREEK
MILFORD 2.9 2.5 2.5 2.5 2.5 2.5 2.5
:IROQUOIS RIVER
CHEBANSE 2.6 2.5 2.4 2.3 2.2 2.2 2.1
:KANKAKEE RIVER
WILMINGTON 1.0 1.0 0.9 0.9 0.9 0.8 0.8
:DES PLAINES RIVER
RUSSELL 3.0 3.0 3.0 2.9 2.9 2.9 2.9
GURNEE 1.3 1.3 1.2 1.2 1.1 1.1 1.1
LINCOLNSHIRE 5.8 5.8 5.8 5.7 5.7 5.7 5.7
DES PLAINES 0.7 0.7 0.7 0.7 0.7 0.7 0.7
RIVERSIDE 1.6 1.6 1.5 1.4 1.4 1.3 1.3
LEMONT 4.8 4.8 4.7 4.6 4.5 4.4 4.3
:W BR DU PAGE RIVER
WARRENVILLE 7.1 7.1 7.0 7.0 7.0 7.0 7.0
:EAST BRANCH DU PAGE RIVER
BOLINGBROOK 14.3 14.3 14.3 14.3 14.3 14.3 14.3
:DU PAGE RIVER
SHOREWOOD 2.0 2.0 2.0 2.0 2.0 2.0 2.0
:MAZON RIVER
COAL CITY 0.5 0.5 0.5 0.5 0.5 0.5 0.5
:FOX RIVER
ALGONQUIN TAILWAT 4.7 4.6 4.6 4.5 4.4 4.3 4.3
MONTGOMERY 11.1 11.0 11.0 11.0 10.9 10.9 10.9
DAYTON 5.4 5.3 5.2 5.1 5.1 5.0 5.0
:VERMILION RIVER
PONTIAC 2.8 2.7 2.7 2.6 2.6 2.6 2.5
LEONORE 3.4 3.3 3.3 3.2 3.2 3.2 3.2
:PECATONICA RIVER
SHIRLAND 4.3 4.3 4.1 3.9 3.7 3.7 3.6
:ROCK RIVER
ROCKTON 3.1 3.0 3.0 2.9 2.7 2.7 2.6
LATHAM PARK 3.9 3.9 3.8 3.7 3.6 3.5 3.5
ROCKFORD 2.5 2.5 2.4 2.3 2.2 2.2 2.1
:KISHWAUKEE RIVER
BELVIDERE 1.2 1.1 1.1 1.1 1.1 1.1 1.0
:SOUTH BRANCH KISHWAUKEE RIVER
DE KALB 2.8 2.7 2.6 2.6 2.6 2.6 2.6
:KISHWAUKEE RIVER
PERRYVILLE 5.4 5.4 5.3 5.3 5.3 5.2 5.2
:ROCK RIVER
BYRON 5.1 5.1 5.1 5.0 4.8 4.8 4.7
DIXON 7.8 7.8 7.7 7.6 7.5 7.4 7.4
:NORTH BRANCH CHICAGO RIVER
CHICAGO ALBANY AV 1.0 1.0 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 10.7 10.7 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.

Test Message 11:00:44.3924755

THIS IS THE WEEKLY TEST OF THE WXWARN1 ALERT SYSTEM THIS IS ONLY A TEST

Thursday, September 19, 2013

Mesoscale Discussion 19:36:41.6989499

AREAS AFFECTED...ERN IA...NRN IL...SRN WI

CONCERNING...SEVERE THUNDERSTORM WATCH 531...

VALID 200036Z - 200230Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 531
CONTINUES.

SUMMARY...LOCALLY STRONG WIND GUSTS WILL REMAIN POSSIBLE...BUT THE
THREAT APPEARS TO BE GRADUALLY WANING WITH TIME.

DISCUSSION...A LINE OF STORMS IS CURRENTLY AFFECTING THE MILWAUKEE
AREA WITH GUSTY WINDS AND HEAVY RAIN...BUT IT APPEARS THAT THE
THREAT FOR SEVERE WEATHER HAS ENDED WITH THIS ACTIVITY.

TO THE SW...A MORE INTENSE LINE OF STORMS WAS MOVING NEW ACROSS ERN
IA...WITH NUMEROUS WIND REPORTS MEASURED AROUND 45 KT. NEAR SEVERE
WINDS WILL REMAIN POSSIBLE WITH THIS BOW...ESPECIALLY THE PORTION
LIFTING NEWD ACROSS THE TRI-STATE REGION.

00Z SOUNDINGS SHOWED AMPLE INSTABILITY FROM DVN TO GRB...WITH THE
STRONGEST LOW TO MIDLEVEL FLOW ACROSS ERN IA. BUT OVERALL...THE
TREND WILL BE FOR STORMS TO GRADUALLY WEAKEN AS THE BOUNDARY LAYER
COOLS DUE TO LOSS OF HEATING. GUSTY WINDS WILL REMAIN A LIKELIHOOD
WITH THE OUTFLOW.

..JEWELL.. 09/20/2013

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...GRB...LOT...MKX...DVN...ARX...

LAT...LON 42278772 40839147 41539113 42139121 42469155 42599167
44028775 42278772

Mesoscale Discussion 16:30:10.5881589

AREAS AFFECTED...ERN IA INTO SRN WI AND NRN NWRN IL

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY

VALID 192129Z - 192300Z

PROBABILITY OF WATCH ISSUANCE...95 PERCENT

SUMMARY...A THREAT OF DAMAGING WINDS SHOULD PERSIST NE OF THE
CURRENT WATCH WHERE STRONG HEATING HAS OCCURRED. A NEW WATCH WILL BE
ISSUED.

DISCUSSION...STORMS CONTINUE TO FORM ALONG THE COLD FRONT WITH A
VERY UNSTABLE AIR MASS IN PLACE DOWNSTREAM. DESPITE MARGINAL DEEP
LAYER SHEAR...SUBSTANTIAL PRECIPITABLE WATER ALONG WITH TALL
UPDRAFTS AND STEEP LOW LEVEL LAPSE RATES SHOULD CONTINUE TO FAVOR
FORWARD PROPAGATION WITH DAMAGING WIND AND MARGINAL HAIL.

..JEWELL/MEAD.. 09/19/2013

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...GRB...LOT...ILX...MKX...DVN...ARX...DMX...

LAT...LON 41399407 42379258 42619108 43469033 43878947 43988835
43808771 43178739 42688752 42288778 40908966 40679127
40699215 40679350 40689413 40939423 41399407

Special Weather Statement 09:05:10.3238290

...SPECIAL WEATHER STATEMENT...

AT 900 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR ALGONQUIN...MOVING NORTHEAST AT 30 MPH.

UP TO PENNY SIZE HAIL...WINDS TO 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM.

CITIES AND TOWNS AFFECTED...
LAKE ZURICH... TOWER LAKES... BARRINGTON...
OAKWOOD HILLS... ISLAND LAKE... INVERNESS...
ALGONQUIN... HOLIDAY HILLS... PALATINE...

OTHER LOCATIONS AFFECTED...
COLLEGE OF LAKE COUNTY...LAKE COUNTY IL FAIRGROUNDS...

I-94 BETWEEN MILE MARKERS 18 AND 30.
I-294 BETWEEN MILE MARKERS 18 AND 30.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS
TREES. HEAVY RAINFALL COULD LEAD TO STANDING WATER ON ROADWAYS AND
POOR VISIBILITY. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM
HAS PASSED.

&&

LAT...LON 4246 8810 4214 8778 4207 8821 4219 8833
TIME...MOT...LOC 1404Z 238DEG 28KT 4219 8816

Radar Scan Zone Alert

This is a severe weather alert from McHenry County Wx.

The alert occurred at 05:42 AM on Sep 19 2013.
The site being monitored is LOT in Chicago, IL.

The site is operating in VCP mode 12.

McHenry County Wx triggered the alert because precipitation exceeded 55 dBZ (VIP level 11).
The maximum detected precipitation level is 55 dBZ (VIP level 11).

McHenry County Wx precipitation sensitivity is set to 50.

The current radar product is Short Range Composite Reflectivity (NCR).

The text description for the maximum detected precipitation level is: "2" to 4"/hr very heavy rain: pea to marble sized hail possible".

Wednesday, September 18, 2013

Test Message 11:00:28.3923171

THIS IS THE WEEKLY TEST OF THE WXWARN1 ALERT SYSTEM THIS IS ONLY A TEST

Wednesday, September 11, 2013

Test Message 11:00:12.3921587

THIS IS THE WEEKLY TEST OF THE WXWARN1 ALERT SYSTEM THIS IS ONLY A TEST

Tuesday, September 10, 2013

Special Weather Statement 10:23:17.3702302

...VERY HOT CONDITIONS TODAY WITH RECORD BREAKING TEMPERATURES LIKELY...

BREEZY SOUTHWEST WINDS WILL BRING ANOTHER PUSH OF UNSEASONABLY HOT
AIR INTO THE AREA TODAY. HIGH TEMPERATURES ARE EXPECTED TO RANGE
FROM THE MID TO UPPER 90S...LIKELY BREAKING RECORDS AT CHICAGO AND
ROCKFORD. THE AIRMASS WILL BE SOMEWHAT DRIER TODAY ALLOWING FOR
LOWER HUMIDITY LEVELS BY AFTERNOON. AS A RESULT...HEAT INDEX
VALUES WILL RANGE FROM THE UPPER 90S TO 100 DEGREES THIS
AFTERNOON.

CONDITIONS LIKE THIS CAN CAUSE EXTRA STRESS ON THOSE PRONE TO HEAT
ILLNESS SUCH AS YOUNG CHILDREN...THE ELDERLY...AND THOSE WHO WORK
OUTDOORS OR IN HOT BUILDINGS. PETS MAY ALSO BE SUSCEPTIBLE TO HEAT
ILLNESS.

Special Weather Statement 04:09:20.1481040

...VERY HOT CONDITIONS TODAY WITH RECORD BREAKING TEMPERATURES LIKELY...

BREEZY SOUTHWEST WINDS WILL BRING ANOTHER PUSH OF UNSEASONABLY HOT
AIR INTO THE AREA TODAY. HIGH TEMPERATURES ARE EXPECTED TO RANGE
FROM THE MID TO UPPER 90S...LIKELY BREAKING RECORDS AT CHICAGO AND
ROCKFORD. THE AIRMASS WILL BE SOMEWHAT DRIER TODAY ALLOWING FOR
LOWER HUMIDITY LEVELS BY AFTERNOON. AS A RESULT...HEAT INDEX
VALUES WILL RANGE FROM THE UPPER 90S TO 100 DEGREES THIS
AFTERNOON.

CONDITIONS LIKE THIS CAN CAUSE EXTRA STRESS ON THOSE PRONE TO HEAT
ILLNESS SUCH AS YOUNG CHILDREN...THE ELDERLY...AND THOSE WHO WORK
OUTDOORS OR IN HOT BUILDINGS. PETS MAY ALSO BE SUSCEPTIBLE TO HEAT
ILLNESS.

Monday, September 9, 2013

Special Weather Statement 11:27:59.4086621

...HOT AND HUMID CONDITIONS EXPECTED TODAY...

SOUTH TO SOUTHWEST FLOW WILL CONTINUE TO SPREAD NEAR RECORD WARMTH
TO MUCH OF THE REGION TODAY. THIS WILL RESULT IN TEMPERATURES
QUICKLY RISING TO THE LOW TO MID 90S...AND EVEN UPPER 90S ACROSS
NORTHWEST AND NORTH CENTRAL ILLINOIS. MODERATE HUMIDITY COINCIDING
WITH THIS 90 DEGREE WEATHER WILL PROVIDE HEAT INDICES APPROACHING
100 DEGREES IN MOST LOCATIONS BY EARLY AFTERNOON...WITH HEAT
INDICES SLIGHTLY ABOVE 100 DEGREES IN THE WARMER LOCATIONS.

Saturday, September 7, 2013

Mesoscale Discussion 16:02:43.5718537

AREAS AFFECTED...IA...WI...IL

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 072101Z - 072300Z

PROBABILITY OF WATCH ISSUANCE...40 PERCENT

SUMMARY...A SEVERE TSTM WATCH IS POSSIBLE IN THE NEXT FEW HOURS FROM
EXTREME SRN WI AND ERN IA TO NRN IL. CHANCES FOR ISOLATED TO
SCATTERED TSTMS WILL INCREASE OVER THESE AREAS INTO THE EVENING.

DISCUSSION...VERY WARM AND UNSTABLE CONDITIONS HAVE DEVELOPED ON THE
EDGE OF PLAINS CAPPING INVERSION FROM ERN IA ACROSS SRN WI AND NRN
IL. THE AREA IS BISECTED BY A WEAK SURFACE TROUGH FROM ERN IA TO SRN
WI. MEANWHILE A MODERATE COLD FRONT WAS MOVING TOWARD THE AREA FROM
CNTRL WI AND A CONVECTIVELY REINFORCED LAKE BREEZE BOUNDARY WAS
SITUATED FROM THE SOUTH SHORE OF LM NWD TO SERN WI. LARGE SCALE LIFT
ACROSS THE AREA THROUGH THE EVENING WILL REMAIN RELATIVELY WEAK BUT
A LOW AMPLITUDE IMPULSE APPEARS TO BE APPROACHING THE AREA FROM IA
ATTM.

ANOTHER HOUR OR SO OF HEATING MAY BE SUFFICIENT TO OVERCOME THE
CAPPING INVERSION AND SUPPORT AT LEAST ISOLATED CONVECTIVE
DEVELOPMENT. NWLY MID LEVEL FLOW OF 30-35KT WILL BE ADEQUATE TO
CONTRIBUTE TO STORM ORGANIZATION AND MAGNITUDE OF AVAILABLE
INSTABILITY AND MID-LEVEL LAPSE RATES WOULD FAVOR LARGE HAIL. IF
STORM COVERAGE INCREASES INTO THE EVENING...COLD POOL EVOLUTION AND
ANY DEVELOPMENT ALONG THE ADVANCING FRONT MOVING INTO SRN WI...IN
ADDITION TO MODEST STRENGTHENING OF DEEP-LAYER NWLY FLOW...COULD
RESULT IN THE DEVELOPMENT OF A FORWARD PROPAGATING SYSTEM WITH
SCATTERED WIND DAMAGE. UNCERTAINTY IN THIS SCENARIO REMAINS TOO
GREAT FOR A WATCH AT THIS TIME BUT THE AREA WILL CONTINUE TO BE
MONITORED.

..CARBIN/MEAD.. 09/07/2013

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...LOT...ILX...MKX...DVN...ARX...

LAT...LON 40598910 40709072 41339094 42459145 43179116 43049011
42818887 41998801 40738800 40598910

Wednesday, September 4, 2013

Test Message 11:00:05.3920895

THIS IS THE WEEKLY TEST OF THE WXWARN1 ALERT SYSTEM THIS IS ONLY A TEST

Special Weather Statement 03:58:02.1413917

GROUND FOG HAS DEVELOPED EARLY THIS MORNING ACROSS PORTIONS OF
NORTHERN ILLINOIS AND NORTHWEST INDIANA. IN SOME OF THE MORE
PROTECTED AND LOW LYING AREAS...VISIBILITIES AT TIMES COULD BE
LESS THAN ONE HALF MILE FROM PATCHY DENSE FOG. MOTORISTS TRAVELING
THIS MORNING SHOULD ALLOW EXTRA TIME IN REACHING YOUR DESTINATION
DUE TO THE PATCHY DENSE FOG.

Sunday, September 1, 2013

Special Weather Statement 19:49:02.7062858

...SPECIAL WEATHER STATEMENT...

AT 746 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS ALONG A LINE EXTENDING FROM WADSWORTH TO WONDER
LAKE...MOVING SOUTHEAST AT 25 MPH.

WINDS GUSTING TO 50 MPH ARE POSSIBLE WITH SOME OF THESE STORMS.

CITIES AND TOWNS AFFECTED...
MCHENRY... LAKE VILLA... MCCULLOM LAKE...
SUNNYSIDE... PISTAKEE HIGHLANDS... FOX LAKE...
WONDER LAKE... ANTIOCH... LAKE CATHERINE...

OTHER LOCATIONS AFFECTED...
CHAIN O LAKES STATE PARK...COLLEGE OF LAKE COUNTY...GREAT LAKES NAVAL
TRAINING CENTER...IL BEACH STATE PARK...LAKE COUNTY FIELDERS
BASEBALL...LAKE COUNTY IL FAIRGROUNDS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL
THESE STORMS HAVE PASSED.

&&

LAT...LON 4250 8790 4245 8779 4239 8780 4235 8782
4233 8782 4233 8781 4231 8781 4230 8782
4224 8782 4215 8809 4215 8813 4237 8841
4250 8812
TIME...MOT...LOC 0047Z 297DEG 20KT 4245 8794 4229 8844

Mesoscale Discussion 18:12:24.6488856

AREAS AFFECTED...WCNTRL THROUGH NERN IL AND EXTREME SERN WI

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 012311Z - 020115Z

PROBABILITY OF WATCH ISSUANCE...20 PERCENT

SUMMARY...A FEW STORMS MAY CONTINUE DEVELOPING FROM WCNTRL THROUGH
NERN IL AND EXTREME SERN WI INTO THE EARLY EVENING AND POSE A
MARGINAL THREAT FOR ISOLATED STRONG WIND GUSTS AND HAIL. WW ISSUANCE
IS UNLIKELY UNLESS CONVECTIVE TRENDS BEGIN TO SUGGEST DEVELOPMENT OF
A MORE ROBUST THREAT.

DISCUSSION...EARLY THIS EVENING A COLD FRONT EXTENDS FROM LAKE MI
SWWD THROUGH SERN WI...NWRN IL INTO NRN MO. CUMULUS HAS BEEN
INCREASING IN THE VICINITY OF THIS BOUNDARY...AND A FEW STORMS HAVE
DEVELOPED FROM NRN IL INTO SERN WI WHERE GLANCING INFLUENCE OF
ASCENT FROM THE SHORTWAVE TROUGH MOVING EWD THROUGH THE GREAT LAKES
MAY BE PRESENT. MULTILAYER CLOUDS FROM EARLIER TODAY WERE SLOW TO
DISSIPATE AND ALLOWED FOR ONLY PARTIAL RECOVERY OF THE BOUNDARY
LAYER. LATEST OBJECTIVE ANALYSIS INDICATES AROUND 1500-2000 J/KG
MLCAPE AND 6.5 C/KM MID-LEVEL LAPSE RATES WITH SFC TEMPERATURES
GENERALLY IN THE 80S. DEEP LAYER WLY SHEAR LESS THAN 30 KT EXISTS IN
WARMS SECTOR...AND WINDS HAVE SHIFTED WLY OR SWLY AHEAD OF THE FRONT
WITH LIMITED CONVERGENCE. MOREOVER...WV IMAGERY INDICATES DRYING
ALOFT IS SPREADING SEWD INTO NRN/CNTRL IL. THESE FACTORS ALONG WITH
DECREASING INSOLATION LOWERS OVERALL CONFIDENCE IN HOW MANY
ADDITIONAL STORMS CAN INITIATE...ESPECIALLY WITH SWD EXTENT INTO IL.
EVEN WHERE STORMS MANAGE TO DEVELOP...SHEAR/INSTABILITY PARAMETER
SPACE APPEARS TO SUPPORT MULTICELLS CAPABLE OF MODEST SEVERE
POTENTIAL.

..DIAL/CORFIDI.. 09/01/2013

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...LOT...ILX...MKX...LSX...DVN...

LAT...LON 39379018 39949092 41588962 42928837 42238775 40858795
39878873 39379018

Non-Precipitation Watch, Warning, Advisory 08:57:43.3194037

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 10 AM CDT /11 AM EDT/
THIS MORNING...

* VISIBILITY...PATCHY AREAS OF ONE QUARTER MILE OR LESS.

* IMPACTS...GREATLY REDUCED VISIBILITY.

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.

&&

Non-Precipitation Watch, Warning, Advisory 06:15:47.2232153

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 9 AM CDT THIS MORNING...

* VISIBILITY...ONE QUARTER MILE OR LESS.

* IMPACTS...GREATLY REDUCED VISIBILITY.

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.

&&

Non-Precipitation Watch, Warning, Advisory 05:23:31.1921689

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS
MORNING...

* VISIBILITY...ONE QUARTER MILE OR LESS.

* IMPACTS...GREATLY REDUCED VISIBILITY.

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.

&&

Non-Precipitation Watch, Warning, Advisory 04:27:58.1591721

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM CDT THIS MORNING...

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL 8 AM CDT THIS MORNING.

* VISIBILITY...ONE QUARTER MILE OR LESS.

* IMPACTS...GREATLY REDUCED VISIBILITY.

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.

&&

Special Weather Statement 02:19:29.828530.2

AREAS OF FOG WITH PATCHY DENSE FOG IS LIKELY THIS MORNING ACROSS
NORTHERN ILLINOIS AND NORTHWEST INDIANA...RESULTING IN REDUCED
VISIBILITIES TO ONE MILE OR LESS IN SOME LOCATIONS. AREA MOTORISTS
SHOULD USE CAUTION AND BE PREPARED TO ENCOUNTER SUDDEN REDUCTIONS
IN VISIBILITY. THIS FOG SHOULD DISSIPATE JUST SHORTLY AFTER
SUNRISE THIS MORNING.