HYDROLOGIC OUTLOOK
Warning Issue Date: 129 PM CST WED DEC 23 2009
RENEWED RISES ON AREA RIVERS POSSIBLE LATER THIS WEEK...
A POTENT STORM SYSTEM WILL MOVE INTO THE AREA ON WEDNESDAY. THIS
SYSTEM IS EXPECTED TO BRING A WINTRY MIX OF SNOW...SLEET...AND
FREEZING RAIN BEFORE CHANGING OVER TO ALL RAIN BY THURSDAY. RAINFALL
AMOUNTS COULD RANGE FROM 1 TO NEARLY 2 INCHES OVER PORTIONS OF
NORTHERN ILLINOIS AND NORTHWEST INDIANA. THIS RAIN ALONG WITH
SNOWMELT WOULD LIKELY RESULT IN RENEWED RISES ON AREA RIVERS AND
CREEKS.
SNOW DEPTHS WERE GREATEST WITHIN PORTIONS OF THE ROCK...UPPER
FOX...AND UPPER DES PLAINES RIVER BASINS WHERE DEPTHS WERE BETWEEN 4
AND 8 INCHES. WATER EQUIVALENT OF THE SNOWPACK IN THOSE AREAS WAS
AROUND 1 INCH. FURTHER SOUTH...SNOW DEPTHS WERE BETWEEN 2 AND 4
INCHES WITH WATER EQUIVALENTS GENERALLY BELOW ONE-HALF INCH.
REPORTED FROST DEPTHS WERE BETWEEN 2 AND 4 INCHES. ALTHOUGH RIVERS
WERE CURRENTLY BELOW FLOOD STAGE...FLOWS WERE SLIGHTLY ABOVE NORMAL.
A COMBINATION OF HEAVY RAIN AND SNOWMELT OVER FROZEN GROUND WOULD
RESULT IN RISES ON AREA STREAMS WITH SOME RISES POSSIBLY ABOVE FLOOD
STAGE.
RESIDENTS IN LOW LYING FLOOD PRONE AREAS ALONG AREA RIVERS AND
CREEKS SHOULD CONTINUE TO MONITOR THIS DEVELOPING WEATHER SYSTEM.
$$
WDM
FLOOD WATCH
Warning Issue Date: 816 PM CST TUE DEC 22 2009
...FLOOD WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
LATE THURSDAY NIGHT...
THE FLOOD WATCH CONTINUES FOR
* PORTIONS OF ILLINOIS...IOWA AND NORTHEAST MISSOURI...INCLUDING
THE FOLLOWING AREAS...IN ILLINOIS...BUREAU...CARROLL...
HANCOCK...HENDERSON...HENRY IL...JO DAVIESS...MCDONOUGH...
MERCER...PUTNAM...ROCK ISLAND...STEPHENSON...WARREN AND
WHITESIDE. IN IOWA...BENTON...BUCHANAN...CEDAR...CLINTON...
DELAWARE...DES MOINES...DUBUQUE...HENRY IA...IOWA...JACKSON...
JEFFERSON...JOHNSON...JONES...KEOKUK...LEE...LINN...LOUISA...
MUSCATINE...SCOTT...VAN BUREN AND WASHINGTON. IN NORTHEAST
MISSOURI...CLARK AND SCOTLAND.
* FROM WEDNESDAY AFTERNOON THROUGH LATE THURSDAY NIGHT
* RAINFALL AMOUNTS FROM 1.5 TO 2.5 INCHES WEDNESDAY THROUGH
THURSDAY NIGHT MAY LEAD TO FLOODING ALONG AREA RIVERS.
FLOODING OF URBAN AND SMALL STREAM DRAINAGE AREAS WILL ALSO BE
POSSIBLE DUE TO BLOCKAGES FROM SNOW AND ICE.
* RISING WATER LEVELS MAY ALSO LEAD TO POTENTIAL ICE JAMS ON
AREA RIVERS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS. MONITOR LATER FORECASTS AND TAKE ACTION IF A
FLOOD WARNING IS ISSUED OR FLOODING DEVELOPS.
$$
WINTER WEATHER ADVISORY
Warning Issue Date: 936 PM CST TUE DEC 22 2009
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM
CST WEDNESDAY...
A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM CST
WEDNESDAY.
* A MIXTURE OF FREEZING RAIN...SLEET...AND SOME SNOW WEDNESDAY
CHANGING TO ALL RAIN LATE IN THE AFTERNOON.
* SNOW AND SLEET AMOUNTS OF AN INCH OR LESS ARE EXPECTED ON
WEDNESDAY.
* ICE ACCUMULATIONS LESS THAN ONE QUARTER INCH ARE POSSIBLE
WEDNESDAY.
* MINOR TO MODERATE TRAVEL IMPACTS ARE EXPECTED FROM THIS STORM
WEDNESDAY THROUGH FRIDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...
AND/OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED
FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND BE CAREFUL
WHILE DRIVING.
$$
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