Flash Flood Watch Effective 1 AM Wednesday Through Wednesday Afternoon; Rain Approaching on Radar

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With a Flash Flood Watch in effect, Chicagoland weather radar shows a very large area of rain and thunderstorms from Wasau, Wisconsin to Springfield, Illinois moving ENE. The leading edge is approaching Rockford and Interstate 39 at about 10:30 p.m. The area of rain extends to a trailing edge at Omaha, Nebraska and Kansas City, Missouri. Flash Flood Watches touch eight states: Nebraska, Iowa, Missouri, Minnesota, Wisconsin, Illinois, Upper Michigan, and Indiana.

In Arlington Heights and the northwest suburbs, heavy rain is forecast to begin about 1:00 a.m. and continue until noon Wednesday with almost 2 inches of rain falling between 11:30 p.m. Tuesday and 3:00 p.m. Wednesday.

FLOOD WATCH
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
941 PM CDT TUE SEP 9 2014

…FLASH FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY AFTERNOON…

WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-
LA SALLE-KENDALL-GRUNDY-WILL-LIVINGSTON-
INCLUDING THE CITIES OF…ROCKFORD…BELVIDERE…WOODSTOCK…
WAUKEGAN…OREGON…DIXON…DEKALB…AURORA…WHEATON…CHICAGO…
OTTAWA…OSWEGO…MORRIS…JOLIET…PONTIAC
941 PM CDT TUE SEP 9 2014

…FLASH FLOOD WATCH REMAINS IN EFFECT FROM 1 AM CDT WEDNESDAY
THROUGH WEDNESDAY AFTERNOON…

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF CENTRAL ILLINOIS…NORTH CENTRAL ILLINOIS AND
NORTHEAST ILLINOIS…INCLUDING THE FOLLOWING COUNTIES…IN
CENTRAL ILLINOIS…LIVINGSTON. IN NORTH CENTRAL ILLINOIS…
BOONE…DE KALB…LA SALLE…LEE…OGLE AND WINNEBAGO. IN
NORTHEAST ILLINOIS…COOK…DUPAGE…GRUNDY…KANE…KENDALL…
LAKE IL…MCHENRY AND WILL.

* FROM 1 AM CDT WEDNESDAY THROUGH WEDNESDAY AFTERNOON.

* DEEPENING LOW PRESSURE WILL MOVE NORTHEAST FROM IOWA TO CENTRAL
LAKE MICHIGAN TONIGHT AND WEDNESDAY DRAGGING A STRONG COLD FRONT
ACROSS THE AREA WEDNESDAY. INCREASING FORCING AND A HIGH LEVEL
OF MOISTURE WILL BRING SHOWERS AND THUNDERSTORMS INTO THE AREA
FROM THE WEST OVERNIGHT AND WEDNESDAY MORNING. THE HEAVIEST
RAINFALL IS EXPECTED LATE TONIGHT AND WEDNESDAY MORNING. 2.0 TO
2.5 INCHES OF RAINFALL IS POSSIBLE ACROSS MUCH OF THE WATCH AREA
THROUGH WEDNESDAY AFTERNOON. THUNDERSTORMS MAY REPEATEDLY TRACK
ACROSS THE SAME AREAS LATE TONIGHT AND WEDNESDAY MORNING WHICH
COULD LEAD TO ISOLATED TOTALS OF 3 TO 5 INCHES.

* FLASH FLOODING MAY CAUSE ROADS TO BE CLOSED AND IMPASSIBLE AND
CAUSE RISES ON AREA RIVERS.

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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