HYDROLOGIC OUTLOOK
Warning Issue Date: 100 PM CST FRI DEC 25 2009
THE SANGAMON RIVER.
THE FOLLOWING FLOOD FORECASTS ARE BASED PRIMARILY ON EXPECTED
RAINFALL OVER THE NEXT 24 HOURS. THERE IS SOME UNCERTAINTY IN THE
CREST FORECASTS AT THIS TIME AND SO THEY WILL LIKELY BE ADJUSTED ONCE
THE RAINFALL IS OBSERVED.
FOR THE SANGAMON RIVER AT PETERSBURG...THE LATEST STAGE IS 13.2 FEET
AT 11 AM THURSDAY. FLOOD STAGE IS 23 FEET. MINOR FLOODING IS
FORECAST...WITH A CREST OF 23.8 FEET WEDNESDAY MORNING...WHICH IS 0.8
FEET ABOVE FLOOD STAGE. THE RIVER SHOULD RISE ABOVE THE FLOOD STAGE
OF 23.0 FEET EARLY MONDAY MORNING. AT 23 FEET...EXTENSIVE
AGRICULTURAL AND LOWLAND FLOODING OCCURS.
FLD OBSERVED FORECAST 6 AM
LOCATION STG STG DAY TIME FRI SAT SUN
SANGAMON RIVER
PETERSBURG 23 13.2 THU 11 AM 14.2 18.2 21.2
$$
07
FLOOD WATCH
Warning Issue Date: 345 PM CST FRI DEC 25 2009
...FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT...
THE FLOOD WATCH CONTINUES FOR
* PORTIONS OF CENTRAL ILLINOIS...EAST CENTRAL ILLINOIS AND
SOUTHEAST ILLINOIS...INCLUDING THE FOLLOWING AREAS...IN
CENTRAL ILLINOIS...CASS...CHRISTIAN...DE WITT...FULTON...
KNOX...LOGAN...MACON...MARSHALL...MASON...MCLEAN...MENARD...
MORGAN...MOULTRIE...PEORIA...PIATT...SCHUYLER...SCOTT...
SHELBY...STARK...TAZEWELL AND WOODFORD. IN EAST CENTRAL
ILLINOIS...CHAMPAIGN...CLARK...COLES...CUMBERLAND...DOUGLAS...
EDGAR AND VERMILION. IN SOUTHEAST ILLINOIS...CLAY...CRAWFORD...
EFFINGHAM...JASPER...LAWRENCE AND RICHLAND.
* UNTIL MIDNIGHT CST TONIGHT
* EXPECT PERIODS OF MODERATE TO LOCALLY HEAVY RAINFALL. RAINFALL
AMOUNTS OF 2 TO 3 INCHES WILL BE POSSIBLE...WITH SOME LOCALLY
HIGHER AMOUNTS.
* THE LATEST SOIL TEMPERATURES ACROSS CENTRAL ILLINOIS INDICATE
THE FROST DEPTH AT BETWEEN 3 TO 5 INCHES. THE COMBINATION OF
THE EXPECTED RAINFALL COUPLED WITH THE FROZEN TOPSOIL WILL
HELP TO PRODUCE SIGNIFICANT RUNOFF INTO AREA RIVERS...CREEKS
AND STREAMS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS.
YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.
$$
BAK
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