349 PM CDT
OUTSIDE OF SOME GUSTY WINDS FOR THE REMAINDER OF THE
AFTERNOON/EARLY EVENING AND ONCE AGAIN ON SATURDAY...NO REAL
CONCERNS IN THE NEAR TERM BUT WITH INCREASED CLOUD COVER AND
CHANCES FOR SHOWERS TOWARDS THE END OF THE WEEKEND.
UPPER LEVEL LOW CONTINUES TO SLOWLY SPIN JUST TO THE NORTH OF THE
CWA THIS AFTERNOON WITH ATTENDANT SURFACE LOW SITUATED JUST NORTH
OF THE GREAT LAKES REGION. WITH THIS SETUP...NORTHWEST FLOW ALOFT
HAS ALLOWED FOR A STEADY STREAM OF MID LEVEL FEATURES/SPEED MAXES
TO PROPAGATE SOUTH/SOUTHEAST ACROSS THE REGION. ONE SUCH FEATURE
CAN BE NOTED ON LATEST SATELLITE IMAGERY DROPPING SOUTH ACROSS
SOUTHERN WISCONSIN AND NORTHERN ILLINOIS WITH ANOTHER SPEED MAX
QUICKLY PUSHING THROUGH SOUTHERN IOWA INTO CENTRAL ILLINOIS...WITH
BOTH OF FEATURES HELPING TO PRODUCE SCATTERED LIGHT SHOWERS LATE
THIS AFTERNOON. INITIALLY TODAY...MOSTLY SUNNY SKIES WERE REPLACED
WITH WIDESPREAD STRATOCU DEVELOPMENT WITH SKIES SINCE THEN
BECOMING MORE PARTLY SUNNY. SINCE THEN...MID LEVEL LAPSE RATES AS
WELL AS LOW LEVEL LAPSE RATES HAVE INCREASED SIGNIFICANTLY ACROSS
MUCH OF THE REGION. AS THIS UPPER LEVEL FEATURE ENCOUNTERED THESE
STEEPENING LAPSE RATES AS WELL AS AN AREA OF HIGHER DEWPOINT AIR
ACROSS NORTH CENTRAL ILLINOIS...SHOWERS HAVE SINCE BEEN ABLE TO
DEVELOP. INITIAL THOUGHTS WERE THAT ANYTHING THAT WOULD DEVELOP
WOULD BE MAINLY IN THE FORM OF SPRINKLES...BUT SINCE THEN A
SMALLER AREA OF ENHANCED REFLECTIVITY HAS BEEN NOTED ON LATEST
RADAR REFLECTIVITY. THIS HAS RESULTED IN SOME LIGHT SHOWERS ACROSS
NORTHEAST ILLINOIS AND NORTHWEST INDIANA. FOR THE REMAINDER OF
THIS AFTERNOON INTO THE EARLY EVENING...AREAS IN THIS LOCATION CAN
EXPECT TO OBSERVE LIGHT SHOWERS OR SPRINKLES WITH VERY LITTLE IF
ANY ACCUMULATION EXPECTED DUE TO OVERALL LACK OF MOISTURE AS WELL
AS THE FAST NATURE OF THESE CONVECTIVE CELLS.
WITH MAIN CLOUD SHIELD TIED TO THE UPPER LEVEL LOW TO THE
NORTH...ANY REMAINING STRATOCU AS WELL AS ANY LINGERING SHOWERS
WILL BOTH DIMINISH THIS EVENING WITH SKIES BECOMING MOSTLY CLEAR
ONCE AGAIN TONIGHT. WITH QUIET AND CLEAR CONDITIONS IN PLACE
TONIGHT...TEMPS WILL FALL INTO THE LOWER 40S FOR MOST OF THE CWA
WITH TEMPS NEAR THE LAKE STAYING IN THE MID TO UPPER 40S. AS UPPER
LEVEL LOW TO THE NORTH CONTINUES TO SLOWLY EXIT TO THE EAST AND
DRIER CONDITIONS CONTINUE TO FILTER IN...THERE WILL BE LESS CLOUD
COVER OVER THE CWA ON SATURDAY. DESPITE SUNNY CONDITIONS...EXPECT
SIMILAR TEMPS AS TO TODAY WITH FORECAST HIGH TEMPERATURES AROUND
60 ACROSS THE NORTHERN CWA AND LOWER 60S ACROSS THE SOUTHERN CWA
EXPECTED. ALTHOUGH AS A MID LEVEL TROUGH AND SURFACE REFLECTION
DROP SOUTH OUT OF THE UPPER MIDWEST LATE SATURDAY NIGHT INTO EARLY
SUNDAY...CLOUD COVER AS WELL AS SHOWERS WILL BE ON THE INCREASE.
THIS INCREASED CHANCE FOR SHOWERS WILL CONTINUE FOR MOST OF THE
DAY ON SUNDAY...BEFORE DRIER AIR BEGINS TO WORKS ITS WAY BACK
ACROSS THE CWA.
RODRIGUEZ
&&
.AVIATION...
//ORD AND MDW CONCERNS...UPDATED 06Z...
* GUSTY WEST WINDS THROUGH EARLY TOMORROW EVENING.
KREIN
//DISCUSSION...UPDATED 06Z...
AN AREA OF LOW PRESSURE CONTINUES TO MOVE OFF TO THE NORTHEAST...AS
AN AREA OF HIGH PRESSURE SLIDES FROM THE CENTRAL PLAINS INTO THE
LOWER MISSISSIPPI VALLEY TONIGHT. THE RESULTANT PRESSURE GRADIENT
BETWEEN THESE TWO SYSTEMS REMAINS STRONG AS THE DEEP LOW CONTINUES
TO DRAW COOLER AIR OUT OF THE NRN PLAINS AND SCNTRL CANADA. THE
COMBINATION OF THE STRONG PRESSURE GRADIENT AND COLD ADVECTION
WILL KEEP STRONG...GUSTY WINDS OVER NRN IL/NWRN INDIANA THROUGH
EARLY TOMORROW EVENING. AT THIS POINT...THE HIGH PRESSURE WILL
BEGIN TO BUILD OVER THE MIDWEST AND WINDS WILL BEGIN TO DIMINISH.
EXPECT GUSTS OF 15-18KT OVERNIGHT THROUGH SHORTLY AFTER SUNRISE.
WINDS SHOULD SLOWLY INCREASE THROUGH THE MORNING AND INTO THE
EARLY AFTERNOON...WITH PEAK GUSTS OF 25-30KT.
OTHERWISE...CONDITIONS WILL BE VFR THROUGH THE PERIOD WITH NO
OPERATIONALLY SIGNIFICANT CLOUD COVER...VSBY RESTRICTIONS OR PCPN.
KREIN
//ORD AND MDW CONFIDENCE...UPDATED 06Z...
* HIGH CONFIDENCE IN ALL FORECAST ELEMENTS.
KREIN
//OUTLOOK FOR ORD/MDW FOR 12Z SUNDAY-12Z FRIDAY...UPDATED 00Z...
SUNDAY THROUGH TUESDAY...VFR WITH PERIODIC RAIN CHANCES...SOME
MVFR POSSIBLE.
WEDNESDAY AND THURSDAY...VFR.
JEE
&&
.MARINE...
251 PM CDT
LOW PRESSURE CURRENTLY OVER SOUTHERN ONTARIO WILL MOVE
NORTHEASTWARD AND STRENGTHEN TONIGHT. HIGH PRESSURE OVER THE
NORTH-CENTRAL GREAT PLAINS WILL SINK SOUTH INTO THE SOUTHERN
MISSISSIPPI RIVER VALLEY TONIGHT. ISOBARS WILL REMAIN TIGHT OVER
THE GREAT LAKES TONIGHT...RESULTING IN WEST TO WEST-NORTHWEST
GALES TO 45 KT ACROSS THE LAKE. GALES UP TO 40 KT WILL LINGER
OVER THE EXTREME NORTHERN PART OF LAKE MICHIGAN TOMORROW MORNING.
SHOWERS WILL ALSO REMAIN OVER THE NORTHERN END OF THE LAKE ON
SATURDAY. WINDS WILL SLOWLY WEAKEN THROUGHOUT THE DAY TOMORROW.
ANOTHER CHANCE OF SHOWERS WILL PASS OVER THE SOUTHERN HALF OF THE
LAKE SATURDAY NIGHT THROUGH SUNDAY.
JEE
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...NONE.
IN...NONE.
LM...GALE WARNING...LMZ080-LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565-
LMZ567-LMZ669-LMZ671-LMZ673-LMZ675-LMZ777-LMZ779-LMZ868-
LMZ870-LMZ872-LMZ874-LMZ876-LMZ878 UNTIL 1 AM SUNDAY.
GALE WARNING...NEARSHORE WATERS UNTIL 1
PM SATURDAY.
&&
$$
