FLASH FLOOD WARNING Issued South of Arlington Heights & Northwest Suburbs, WATCH for Northwest Suburbs

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Heavy rain is impacting areas south of Arlington Heights and the northwest suburbs. Thunder is rumbling throughout Chicagoland this morning, but the heavier thunderstorms are located in southern Cook County, northern Will County, and southern Kane County. The northwest suburbs are affected by FLOOD WARNING BULLETIN issued for the Des Plaines River near Des Plaines. The Du Page River is also included in the National Weather Service FLOOD WARNING.

The northwest suburbs are also under a Flash Flood Watch as conditions exist in our area that could bring the development of thunderstorms later today which could bring new heavy rain amounts. A cold front is expected by 1:00 p.m. with clearing of rain by 2:00 p.m. Clouds are expected to break around midnight with clearing and low 70’s after midnight.

In summary, the FLASH FLOOD WARNING, which occurs from immediate rain that causes runoff and overflowing in viaducts, rivers, streams, ponds and lakes, is affecting areas south of the northwest suburbs. A FLOOD WARNING, which is a slower event caused by rising river levels, is affecting the northwest suburbs in Des Plaines.


– EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
826 AM CDT SUN JUL 24 2011

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* FLASH FLOOD WARNING FOR…
KENDALL COUNTY IN NORTHEAST ILLINOIS…
NORTHERN WILL COUNTY IN NORTHEAST ILLINOIS…
SOUTHERN COOK COUNTY IN NORTHEAST ILLINOIS…
SOUTHERN KANE COUNTY IN NORTHEAST ILLINOIS…

* UNTIL 230 PM CDT SUNDAY

* AT 823 AM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS ALONG A LINE FROM SUGAR GROVE TO
CHICAGO. RADAR ESTIMATES THAT TWO TO THREE INCHES…WITH LOCALIZED
HIGHER AMOUNTS HAVE FALLEN ACROSS THE WARNED AREA.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE…
BOLINGBROOK…CALUMET CITY…CHICAGO HEIGHTS…DOLTON…
FLOSSMOOR…FRANKFORT…GLENWOOD…HOMER GLEN…INGALLS PARK…
JOLIET…LANSING…LEMONT…LITTLE ROCK…LOCKPORT…LYNWOOD…
MATTESON…MIDLOTHIAN…MOKENA…NEW LENOX…OLYMPIA FIELDS…
ORLAND PARK…OSWEGO…PARK FOREST…PLAINFIELD…PLANO…POSEN…
ROMEOVILLE…STEGER…TINLEY PARK AND YORKVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

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