HYDROLOGIC OUTLOOK
Warning Issue Date: 129 PM CST TUE DEC 22 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.
$$
WDM
WINTER STORM WATCH
Warning Issue Date: 1131 AM CST TUE DEC 22 2009
...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
THURSDAY MORNING...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER STORM
WATCH...WHICH IS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
THURSDAY MORNING.
* TIMING...LIGHT SLEET AND FREEZING RAIN WILL BEGIN DURING THE DAY
WEDNESDAY. HEAVIEST FREEZING RAIN IS EXPECTED FROM WEDNESDAY
EVENING INTO THURSDAY MORNING.
* ACCUMULATIONS...UP TO A QUARTER INCH OF ICE.
* HAZARDS...ACCUMULATION. SOME SLEET AND LIGHT SNOW MAY MIX AS
PRECIPITATION BEGINS ON WEDNESDAY.
* IMPACTS...GLAZING OF ROADWAYS...PARKING LOTS AND SIDEWALKS. THIS
WILL MAKE FOR HAZARDOUS TRAVEL ON UNTREATED SURFACES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
$$
RATZER
|
