HAZARDOUS WEATHER OUTLOOK
Issue Date: 556 AM CST MON DEC 21 2009
Expiration: 600 AM CST TUE DEC 22 2009
...MAJOR WINTER STORM TO HAVE PROLONGED EFFECT ON IOWA...
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST
CENTRAL...CENTRAL AND SOUTHERN IOWA.
.DAY ONE...TODAY AND TONIGHT
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
A MAJOR WINTER STORM WILL IMPACT THE AREA THIS WEEK WITH INITIAL
CONDITIONS BEGINNING TUESDAY AND LASTING RIGHT ON INTO THE START
OF THE WEEKEND. AREAS OF FREEZING DRIZZLE WILL BEGIN
TUESDAY...TRANSITIONING INTO LIGHT FREEZING RAIN TUESDAY
NIGHT...THEN EITHER SNOW...SLEET OR FREEZING RAIN FOR MUCH OF
WEDNESDAY AND WEDNESDAY NIGHT. MUCH OF THE SNOW WILL FALL OVER THE
NORTHWEST THIRD OF IOWA WHERE SIX TO EIGHT INCHES OF SNOW MAY
ACCUMULATE BY DAYBREAK THURSDAY.
FARTHER SOUTHEAST INTO CENTRAL IOWA...A WINTRY MIX OF FREEZING
RAIN...SLEET AND SNOW IS MORE LIKELY. AMOUNTS OF ANY PARTICULAR
FORM OF PRECIPITATION ARE DIFFICULT TO DETERMINE AS OF YET...BUT
ABOUT A TENTH OF AN INCH OF ICING FOLLOWED BY MODERATE SNOW
ACCUMULATIONS SHOULD OCCUR BY WEDNESDAY NIGHT. IN SOUTHEAST
IOWA...PERIODIC FREEZING RAIN MAY OCCUR WHEN IT IS NOT WARM ENOUGH
TO SWITCH TO ALL RAIN.
ADDITIONAL SNOW ACCUMULATIONS ARE ALSO EXPECTED THURSDAY INTO
FRIDAY WHICH WILL BE ACCOMPANIED BY STRONG WINDS. THIS WILL LIKELY
RESULT IN CONSIDERABLE BLOWING AND DRIFTING WITH THE WORSE
CONDITIONS...NEAR BLIZZARD AT TIMES...OVER THE NORTHWEST HALF OF
THE STATE.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT SNOWFALL AMOUNTS AND
REPORT OF ADVERSE WINTER CONDITIONS ARE APPRECIATED AND ENCOURAGED.
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