WINTER STORM WARNING
Warning Issue Date: 950 PM CST WED DEC 23 2009
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST
FRIDAY NIGHT...
A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST
FRIDAY NIGHT.
* LONG TERM TRENDS...THE WINTRY MIX AND SNOW AND SLEET WILL
CONTINUE OVERNIGHT BEFORE EVENTUALLY TRANSITIONING TO ALL SNOW
LATE THURSDAY OR EARLY FRIDAY. THIS CHANGE OVER TO SNOW WILL BE
COINCIDENT WITH INCREASING NORTH TO NORTHWEST WINDS PRODUCING
GREATLY REDUCED VISIBILITIES AND NEAR BLIZZARD CONDITIONS.
* TOTAL SNOW AND ICE ACCUMULATIONS...TWO TENTHS TO A HALF OF AN
INCH OF ICE MAY ACCUMULATE WITH THE HIGHEST AMOUNTS ALONG THE
HIGHWAY 20 AND 30 CORRIDORS BEFORE THE CHANGE TO ALL SNOW. BY
THE TIME THE SNOW ENDS SATURDAY...AMOUNTS ARE FORECAST TO
RANGE FROM TWELVE TO FOURTEEN INCHES FROM ATLANTIC...TO
WEBSTER CITY...TO HAMPTON... WITH 14 TO 20 INCHES NORTHWEST OF
A LINE FROM NEAR DENISON TO MASON CITY. THE HIGHEST AMOUNTS OF
THAT RANGE SHOULD OCCUR FARTHER NORTHWEST TOWARD ESTHERVILLE.
* WINDS...BRISK EAST WINDS OF 15 TO 25 MPH WILL BE COMMON
THROUGH THURSDAY...HOWEVER BY FRIDAY...WINDS WILL BECOME
NORTHWEST AT 25 TO 35 MPH WITH HIGHER GUSTS.
* VISIBILITY...DURING THE PERIODS OF HEAVY SNOW THURSDAY INTO
FRIDAY...VISIBILITIES WILL GENERALLY BE LESS THAN ONE MILE AND
DOWN TO A QUARTER MILE DURING THE HEAVIEST SNOWS. NEAR
BLIZZARD CONDITIONS MAY DEVELOP OVER NORTHWEST IOWA.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE
WARNING AREA OVER THE NEXT SEVERAL DAYS AND WILL LIKELY BE
IMPOSSIBLE BY FRIDAY AS SNOW ACCUMULATES AND WINDS INCREASE.
WITH AROUND OF FOOT OF SNOW ALREADY ON THE GROUND IN PARTS OF
NORTHWEST IOWA...SNOW DEPTHS MAY REACH TWO TO THREE FEET BY
THE WEEKEND WITH DRIFTS REACHING ROOFTOPS OF HOUSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW...
SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO
POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.
$$
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