HYDROLOGIC OUTLOOK
Warning Issue Date: 1125 AM CST THU DEC 24 2009
THE ILLINOIS 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 ILLINOIS RIVER AT HAVANA...THE LATEST STAGE IS 11.7 FEET AT
10 AM WEDNESDAY. FLOOD STAGE IS 14.0 FEET. MINOR FLOODING IS
FORECAST...WITH A CREST OF 14.0 FEET MONDAY EVENING...WHICH IS EQUAL
TO THE FLOOD STAGE. THE RIVER SHOULD RISE ABOVE THE FLOOD STAGE OF
14.0 FEET MONDAY EVENING. AT 14.0 FEET...MINOR FLOODING BEGINS TO
AGRICULTURAL AREAS NOT PROTECTED BY LEVEES.
FOR THE ILLINOIS RIVER AT BEARDSTOWN...THE LATEST STAGE IS 12.4 FEET
AT 11 AM WEDNESDAY. FLOOD STAGE IS 14.0 FEET. MINOR FLOODING IS
FORECAST...WITH A CREST OF 14.2 FEET EARLY THURSDAY MORNING...WHICH
IS 0.2 FEET ABOVE FLOOD STAGE. THE RIVER SHOULD RISE ABOVE THE FLOOD
STAGE OF 14.0 FEET TUESDAY MORNING. AT 14.0 FEET...MINOR FLOODING
BEGINS TO AGRICULTURAL AREAS NOT PROTECTED BY LEVEES.
FLD OBSERVED FORECAST 6AM
LOCATION STG STG DAY TIME THU FRI SAT
ILLINOIS RIVER
HAVANA 14 11.7 WED 10 AM 12.0 12.7 13.3
BEARDSTOWN 14 12.4 WED 11 AM 12.4 12.8 13.5
$$
FLOOD WATCH
Warning Issue Date: 337 PM CST THU DEC 24 2009
...FLOOD WATCH NOW IN EFFECT THROUGH THURSDAY EVENING...
THE FLOOD WATCH IS NOW IN EFFECT FOR
* PORTIONS OF ILLINOIS AND MISSOURI...INCLUDING THE FOLLOWING
COUNTIES...IN ILLINOIS...ADAMS IL...BOND IL...BROWN IL...
CALHOUN IL...CLINTON IL...FAYETTE IL...GREENE IL...JERSEY IL...
MACOUPIN IL...MADISON IL...MARION IL...MONROE IL...MONTGOMERY
IL...PIKE IL...RANDOLPH IL...ST. CLAIR IL AND WASHINGTON IL.
IN MISSOURI...AUDRAIN...BOONE...CALLAWAY...COLE...CRAWFORD...
FRANKLIN...GASCONADE...IRON...JEFFERSON...KNOX...LEWIS...
LINCOLN...MADISON...MARION...MONITEAU...MONROE...MONTGOMERY...
OSAGE...PIKE...RALLS...REYNOLDS...SHELBY...ST. CHARLES...ST.
FRANCOIS...ST. LOUIS...ST. LOUIS CITY...STE. GENEVIEVE...
WARREN AND WASHINGTON.
* THROUGH THURSDAY EVENING
* SHOWERS AND SCATTERED THUNDERSTORMS HAVE ALREADY PRODUCED 1 TO 2
INCHES OF RAINFALL OVER PARTS OF CENTRAL MISSOURI AND SOUTH
CENTRAL ILLINOIS. THE RAIN IS EXPECTED TO CONTINUE THROUGH
THURSDAY EVENING AND BE HEAVY AT TIMES...WITH TOTAL RAINFALL
AMOUNTS BETWEEN 2 AND 4 INCHES. THE RAIN WILL IMMEDIATELY BECOME
RUNOFF THAT IS CAPABLE OF PRODUCING FLOODING...PARTICULARLY
WHERE THE SOIL IS NOW EITHER SATURATED OR STILL FROZEN.
* EXCESSIVE RUNOFF COULD LEAD TO FLOODING ALONG CREEKS AND RIVERS
ACROSS THE AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLOOD WATCH MEANS THAT FLOODING IS POSSIBLE BUT NOT IMMINENT IN
THE WATCH AREA. PEOPLE IN THE WATCH AREA ARE URGED TO CHECK ON
PREPAREDNESS REQUIREMENTS...ESPECIALLY IF YOU HAVE INTERESTS
ALONG AREA RIVERS. STAY INFORMED...AND BE READY FOR ACTION IF
FLOODING IS OBSERVED OR IF A FLOOD WARNING IS ISSUED.
$$
BRITT
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