Regional Weather Summary
Issued by NWS Chicago, IL

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AWUS83 KLOT 202303
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ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
211115-

WEATHER SUMMARY FOR NORTHERN ILLINOIS AND NORTHWEST INDIANA
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
603 PM CDT WED AUG 20 2014 /703 PM EDT WED AUG 20 2014/

WEDNESDAY AFTERNOON WAS PARTLY CLOUDY TO MOSTLY CLOUDY WITH HIGHS
IN THE LOWER AND MID 80S. ISOLATED SHOWERS OCCURRED IN PARTS OF
WEST CENTRAL AND EAST CENTRAL ILLINOIS DURING THE AFTERNOON...WITH
A FEW ISOLATED SHOWERS AND STORMS POSSIBLE FOR PARTS OF NORTHERN
AND CENTRAL ILLINOIS DURING WEDNESDAY EVENING. MORE WIDESPREAD
SHOWER AND THUNDERSTORM DEVELOPMENT IS EXPECTED TO OCCUR OVERNIGHT
INTO MID TO LATE MORNING THURSDAY AS A WARM FRONT LIFTS NORTH AND
AN UPPER DISTURBANCE MOVES OVER THE AREA. WITH A MOIST AIR MASS IN
PLACE...ANY THUNDERSTORM WILL BE CAPABLE OF HEAVY DOWNPOURS AND
COULD PRODUCE LOCALIZED FLOODING. LOW TEMPERATURES BY EARLY
THURSDAY WILL BE IN THE UPPER 60S TO AROUND 70 DEGREES.

THE REST OF THURSDAY WILL BE VERY WARM AND HUMID WITH HIGHS IN THE
MID AND UPPER 80S AND HEAT INDEX VALUES IN THE 90S. THERE IS A
CHANCE FOR ADDITIONAL ISOLATED TO SCATTERED SHOWER AND
THUNDERSTORM DEVELOPMENT DURING THE AFTERNOON...POSSIBLY BECOMING
MORE WIDESPREAD AGAIN FOR SOME AREAS ON THURSDAY EVENING AND
NIGHT. PERIODIC ISOLATED TO SCATTERED THUNDERSTORMS WILL REMAIN
POSSIBLE FRIDAY THROUGH THE WEEKEND. HIGHS WILL BE IN THE UPPER
80S TO LOWER 90S...WITH HEAT INDEX VALUES IN THE UPPER 90S TO MID
100S. THE EXCEPTION OVER THE WEEKEND WILL BE THE ENTIRE SHORE ON
SATURDAY BEING LIMITED TO THE MID 80S BY ONSHORE WINDS IN THE WAKE
OF A BACK DOOR COLD FRONT PASSAGE AND THEN THE ILLINOIS SHORE ON
SUNDAY KEPT SLIGHTLY COOLER BY SOUTHEAST WINDS.

$$

RC

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