HYDROLOGIC OUTLOOK
Warning Issue Date: 1217 PM CST TUE DEC 22 2009
HEAVY RAINFALL POTENTIAL INCREASING OVER CENTRAL AND SOUTHEAST
ILLINOIS WEDNESDAY AND THURSDAY...
AN INTENSE STORM SYSTEM IS EXPECTED TO SLOWLY PUSH NORTHEAST FROM
THE SOUTHERN PLAINS INTO THE MID MISSISSIPPI VALLEY WEDNESDAY AND
THURSDAY BRINGING WITH IT THE THREAT FOR HEAVY RAINFALL AND FLOODING
OVER PARTS OF CENTRAL...EAST CENTRAL AND SOUTHEAST ILLINOIS. THERE
IS THE POTENTIAL FOR 2 TO 3 INCHES OF RAIN ACROSS THE AREA BY THURSDAY
EVENING...WITH LOCALIZED 4 INCH AMOUNTS POSSIBLE. LOCAL FROST DEPTH
OBSERVATIONS ACROSS CENTRAL ILLINOIS INDICATES VALUES RANGE FROM 3 TO
5 INCHES. RAINFALL OF THIS MAGNITUDE OVER THE FROZEN SURFACE WILL
PRODUCE MOSTLY RUNOFF INTO AREA RIVERS...STREAMS AND CREEKS...INCREASING
THE THREAT FOR FLOODING LATER THIS WEEK.
ALTHOUGH ALL OF THE RIVERS ACROSS CENTRAL...EAST CENTRAL AND SOUTHEAST
ILLINOIS WERE NOW BELOW FLOOD STAGE...RAINFALL AMOUNTS THAT ARE NOW
EXPECTED ACROSS THE AREA INTO LATE THURSDAY WILL CAUSE MANY OF THE
RIVERS...CREEKS AND STREAMS TO EXPERIENCE SIGNIFICANT RISES.
PEOPLE LIVING OR TRAVELING NEAR CREEKS...STREAMS...OR LOW LYING
FLOOD PRONE AREAS SHOULD CLOSELY MONITOR WEATHER CONDITIONS THIS
WEEK. FOR UPDATED RIVER INFORMATION ACROSS CENTRAL AND SOUTHEAST
ILLINOIS...PLEASE VISIT OUR AHPS WEBSITE AT THE FOLLOWING LINK...
HTTP://WWW.CRH.NOAA.GOV/AHPS2/INDEX.PHP?WFO=ILX (ALL LOWER CASE)
$$
SMITH
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