FLOOD ADVISORY Northern Cook County and Other Counties in Northeast Illinois

FLOOD ADVISORY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
208 AM CDT SUN APR 15 2012

KANE IL-MCHENRY IL-OGLE IL-WINNEBAGO IL-BOONE IL-DE KALB IL-DUPAGE
IL-
LEE IL-LAKE IL-COOK IL-
208 AM CDT SUN APR 15 2012


THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED AN

* URBAN AND SMALL STREAM FLOOD ADVISORY FOR…
BOONE COUNTY IN NORTH CENTRAL ILLINOIS…
DE KALB COUNTY IN NORTH CENTRAL ILLINOIS…
DUPAGE COUNTY IN NORTHEAST ILLINOIS…
KANE COUNTY IN NORTHEAST ILLINOIS…
LAKE COUNTY IN NORTHEAST ILLINOIS…
LEE COUNTY IN NORTH CENTRAL ILLINOIS…
MCHENRY COUNTY IN NORTHEAST ILLINOIS…
NORTHERN COOK COUNTY IN NORTHEAST ILLINOIS…
OGLE COUNTY IN NORTH CENTRAL ILLINOIS…
WINNEBAGO COUNTY IN NORTH CENTRAL ILLINOIS…

* UNTIL 500 AM CDT

* AT 200 AM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH HEAVY RAINFALL ACROSS THE ADVISORY AREA. DOPPLER
RADAR ESTIMATED ONE TO TWO INCHES OF RAIN HAD FALLEN ACROSS FAR
NORTHERN ILLINOIS SINCE LATE SATURDAY EVENING. THUNDERSTORMS
WERE CONTINUING TO REGENERATE ACROSS THIS AREA AND WILL BE FAVORED
THROUGH DAYBREAK. THE MOST SUSCEPTIBLE AREAS TO FLOODING WILL
INCLUDE URBAN AREAS SUCH AS ROCKFORD…NEAR THE INTERSTATE 88
AND 90 CORRIDORS…AND THE NORTHERN…CENTRAL…AND WESTERN METRO
AREA TO CHICAGO.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE MINOR FLOODING TO
OCCUR…ESPECIALLY ALONG SMALL STREAMS AND NEAR LOW WATER
CROSSINGS. SOME LOCATIONS THAT WILL EXPERIENCE MINOR FLOODING
INCLUDE…ANTIOCH…ARLINGTON HEIGHTS…AURORA…BARRINGTON…
BATAVIA…BELVIDERE…BUFFALO GROVE…CAROL STREAM…CHICAGO…
DE KALB…DES PLAINES…DIXON…ELGIN…EVANSTON…LISLE…
ROCHELLE…ROCKFORD…WOODSTOCK…AND ZION.

THERE HAVE ALREADY BEEN REPORTS OF SOME STANDING WATER ON ROADWAYS
IN ROCKFORD…AS WELL AS QUICK RISES TO SOME AREA STREAMS.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

AN ADDITIONAL ONE TO TWO INCHES OF RAINFALL ARE STILL POSSIBLE IN
THE ADVISORY AREA.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE ELEVATED LEVELS ON SMALL
CREEKS AND STREAMS…PONDING OF WATER ON ROADS…URBAN AREAS…
HIGHWAYS… VIADUCTS…UNDERPASSES AND LOW LYING AREAS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. DO NOT DRIVE THROUGH AREAS WHERE WATER COVERS
THE ROADWAY.

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.

TO REPORT FLOODING…HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN CHICAGO.


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