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.
$$
WDM
WINTER STORM WATCH
Warning Issue Date: 335 PM CST WED DEC 23 2009
...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO
NOON CST WEDNESDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER
WEATHER ADVISORY FOR FREEZING DRIZZLE...WHICH IS IN EFFECT FROM 9 PM THIS
EVENING TO NOON CST WEDNESDAY. A WINTER STORM WATCH REMAINS IN
EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY MORNING.
* TIMING...FREEZING DRIZZLE WILL BEGIN ACROSS THE AREA LATE THIS
EVENING...LASTING THROUGH LATE WEDNESDAY MORNING. A HEAVIER AREA
OF PRECIPITATION...INCLUDING LIGHT SLEET AND FREEZING RAIN WILL
OVERSPREAD THE AREA DURING THE EARLY AFTERNOON WEDNESDAY. THE HEAVIEST
FREEZING RAIN IS EXPECTED FROM WEDNESDAY EVENING INTO THURSDAY
MORNING.
* ACCUMULATIONS...A GLAZING OF FREEZING DRIZZLE IS POSSIBLE LATE
THIS EVENING AND THROUGH THE MORNING WEDNESDAY. MORE
SUBSTANTIAL PRECIPITATION BEGINNING EARLY WEDNESDAY AFTERNOON
MAY RESULT IN UP TO A QUARTER INCH OF ICE.
* HAZARDS...ACCUMULATION OF ICE. SOME SLEET AND LIGHT SNOW MAY
MIX AS PRECIPITATION BEGINS ON WEDNESDAY.
* IMPACTS...GLAZING OF ROADWAYS...PARKING LOTS AND SIDEWALKS.
THIS WILL MAKE FOR HAZARDOUS TRAVEL ON UNTREATED SURFACES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
A WINTER WEATHER ADVISORY MEANS THAT FREEZING DRIZZLE WILL RESULT IN
SLIPPERY ROADWAYS AND CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
HAZARDOUS DRIVING CONDITIONS AND USE CAUTION WHILE TRAVELING.
$$
WINTER WEATHER ADVISORY
Warning Issue Date: 335 PM CST WED DEC 23 2009
...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO
NOON CST WEDNESDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER
WEATHER ADVISORY FOR FREEZING DRIZZLE...WHICH IS IN EFFECT FROM 9 PM THIS
EVENING TO NOON CST WEDNESDAY. A WINTER STORM WATCH REMAINS IN
EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY MORNING.
* TIMING...FREEZING DRIZZLE WILL BEGIN ACROSS THE AREA LATE THIS
EVENING...LASTING THROUGH LATE WEDNESDAY MORNING. A HEAVIER AREA
OF PRECIPITATION...INCLUDING LIGHT SLEET AND FREEZING RAIN WILL
OVERSPREAD THE AREA DURING THE EARLY AFTERNOON WEDNESDAY. THE HEAVIEST
FREEZING RAIN IS EXPECTED FROM WEDNESDAY EVENING INTO THURSDAY
MORNING.
* ACCUMULATIONS...A GLAZING OF FREEZING DRIZZLE IS POSSIBLE LATE
THIS EVENING AND THROUGH THE MORNING WEDNESDAY. MORE
SUBSTANTIAL PRECIPITATION BEGINNING EARLY WEDNESDAY AFTERNOON
MAY RESULT IN UP TO A QUARTER INCH OF ICE.
* HAZARDS...ACCUMULATION OF ICE. 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.
A WINTER WEATHER ADVISORY MEANS THAT FREEZING DRIZZLE WILL RESULT IN
SLIPPERY ROADWAYS AND CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
HAZARDOUS DRIVING CONDITIONS AND USE CAUTION WHILE TRAVELING.
$$
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