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)
$$
SMITH
WINTER WEATHER ADVISORY
Warning Issue Date: 257 PM CST TUE DEC 22 2009
...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO
NOON CST WEDNESDAY...
THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A WINTER
WEATHER ADVISORY FOR FREEZING DRIZZLE...WHICH IS IN EFFECT
FROM 9 PM THIS EVENING TO NOON CST WEDNESDAY.
* TEMPERATURES WILL DIP BELOW THE FREEZING MARK BY 9 PM THIS
EVENING...THEN RISE BACK ABOVE FREEZING WEDNESDAY MORNING. THIS
WILL BE THE PRIMARY TIME FOR ICING ACROSS THE ADVISORY AREA.
* ICE ACCUMULATIONS WILL BE LIGHT...GENERALLY LESS THAN ONE
QUARTER OF AN INCH.
* SECONDARY ROADS AND OVERPASSES WILL BECOME SLICK AND HAZARDOUS.
DRIVERS SHOULD EXERCISE CAUTION AND ALLOW EXTRA TIME TO ARRIVE
AT THEIR DESTINATIONS...PARTICULARLY DURING THE WEDNESDAY
MORNING COMMUTE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR NOAA WEATHER RADIO FOR THE LATEST INFORMATION...FORECASTS...AND
WARNINGS.
$$
BARNES
FLOOD WATCH
Warning Issue Date: 310 PM CST TUE DEC 22 2009
...FLOOD WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
THURSDAY EVENING...
THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A
* FLOOD WATCH FOR PORTIONS OF CENTRAL ILLINOIS...EAST CENTRAL
ILLINOIS AND SOUTHEAST ILLINOIS...INCLUDING THE FOLLOWING
AREAS...IN CENTRAL ILLINOIS...CASS...CHRISTIAN...DE WITT...
FULTON...KNOX...LOGAN...MACON...MARSHALL...MASON...MCLEAN...
MENARD...MORGAN...MOULTRIE...PEORIA...PIATT...SANGAMON...
SCHUYLER...SCOTT...SHELBY...STARK...TAZEWELL AND WOODFORD. IN
EAST CENTRAL ILLINOIS...CHAMPAIGN...CLARK...COLES...
CUMBERLAND...DOUGLAS...EDGAR AND VERMILION. IN SOUTHEAST
ILLINOIS...CLAY...CRAWFORD...EFFINGHAM...JASPER...LAWRENCE AND
RICHLAND.
* FROM WEDNESDAY AFTERNOON THROUGH THURSDAY EVENING
* PERIODS OF MODERATE TO LOCALLY HEAVY RAINFALL WITH ISOLATED
THUNDERSTORMS.
* THE LATEST SOIL TEMPERATURES ACROSS CENTRAL ILLINOIS INDICATE
THE FROST DEPTH AT BETWEEN 3 TO 5 INCHES. THE COMBINATION OF THE
EXPECTED RAINFALL COUPLED WITH THE FROZEN TOPSOIL WILL HELP TO
PRODUCE SIGNIFICANT RUNOFF INTO AREA RIVERS...CREEKS AND
STREAMS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS.
YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.
$$
SMITH
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