Flash Flood Watch, Possible Severe Weather Overnight

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Current radar [LIVE RADAR] show precipitation developing and then diminishing near Rockford and along most of the Illinois-WIsconsin State Line.

Heavy storms are developing near Peoria and Decatur. All storms are moving in east-northeast direction. Convection and developing storms are more likely to occur suddenly in north central Illinois, compared to eastern Iowa. The worst weather may be near a line along I-80 and I-88, and in northwest Indiana.

ARLIGNTON HEIGHTS FORECAST
THIS AFTERNOON
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. Southwest wind around 10 mph.

Tonight
Showers and thunderstorms likely, mainly after 7pm. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 72. South southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 87. South southwest wind 5 to 10 mph.
Wednesday Night A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. West wind 5 to 10 mph.

Thursday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 84. West northwest wind 10 to 15 mph.
Thursday Night Partly cloudy, with a low around 70.

FLOOD WATCH
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
315 PM CDT TUE JUN 25 2013

…MORE HEAVY RAINFALL POSSIBLE TONIGHT THROUGH WEDNESDAY…

WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-
LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-IROQUOIS-FORD-
LAKE IN-PORTER-NEWTON-JASPER-BENTON-
INCLUDING THE CITIES OF…ROCKFORD…BELVIDERE…WOODSTOCK…
WAUKEGAN…OREGON…DIXON…DEKALB…AURORA…WHEATON…CHICAGO…
OTTAWA…OSWEGO…MORRIS…JOLIET…KANKAKEE…PONTIAC…
WATSEKA…PAXTON…GARY…VALPARAISO…MOROCCO…RENSSELAER…
FOWLER
315 PM CDT TUE JUN 25 2013 /415 PM EDT TUE JUN 25 2013/

…FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY
EVENING…

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF ILLINOIS AND INDIANA…INCLUDING THE FOLLOWING
AREAS…IN ILLINOIS…BOONE…COOK…DE KALB…DUPAGE…FORD…
GRUNDY…IROQUOIS…KANE…KANKAKEE…KENDALL…LA SALLE…
LAKE IL…LEE…LIVINGSTON…MCHENRY…OGLE…WILL AND
WINNEBAGO. IN INDIANA…BENTON…JASPER…LAKE IN…NEWTON AND
PORTER.

* THROUGH WEDNESDAY EVENING.

* THUNDERSTORMS ARE EXPECTED TO REDEVELOP THIS AFTERNOON AND
EVENING AND GROW IN COVERAGE AND INTENSITY INTO TONIGHT. THESE
WILL BE CAPABLE OF HEAVY RAINFALL RATES OF 1 TO 2 INCH PER HOUR
AND POTENTIAL TRAINING OVER THE SAME AREA. THIS ON TOP OF
ALREADY SATURATED GROUND FROM RECENT STORMS COULD PRODUCE FLASH
FLOODING.

* RAPID FLOODING OF CREEKS…SMALL STREAMS…ROADS…VIADUCTS…
AND LOW LYING AREAS IS POSSIBLE IN THUNDERSTORMS.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.


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