WINTER STORM WARNING
Warning Issue Date: 343 PM CST WED DEC 23 2009
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST
FRIDAY NIGHT...
...WINTER STORM WARNING...
* LONG TERM TRENDS...THE WINTRY MIX AND SNOW AND SLEET WILL
CONTINUE LATE THIS AFTERNOON AND TONIGHT 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...ONE TO FOUR TENTHS 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...SHOULD 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
HIGHER 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
EVEN DOWN TO A QUARTER MILE DURING THE HEAVIEST SNOWS. WHITE
OUT 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 WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE
DRIVING.
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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