HAZARDOUS WEATHER OUTLOOK
Issue Date: 440 AM CST TUE DEC 8 2009
Expiration: 400 AM CST WED DEC 09 2009
...HIGH IMPACT...VERY DANGEROUS WINTER STORM THROUGH WEDNESDAY...
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST
CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST
MISSOURI.
.DAY ONE...TODAY AND TONIGHT
A HIGH IMPACT...EXTREMELY DANGEROUS WINTER STORM WILL MOVE OUT OF THE
PLAINS INTO THE GREAT LAKES TONIGHT. THIS SYSTEM WILL PRODUCE SNOW...
BECOMING HEAVY AT TIMES LATE THIS AFTERNOON AND CONTINUING TONIGHT.
A MIXTURE OF SNOW AND SLEET IS POSSIBLE SOUTH OF HIGHWAY 34 THIS
AFTERNOON INTO THIS EVENING AS WARMER AIR IS PULLED NORTHWARD...BUT
THE PRECIPITATION WILL CHANGE BACK TO ALL SNOW BY LATE EVENING.
THUNDER-SNOW MAY OCCUR TONIGHT RESULTING IN SNOW ACCUMULATION RATES
OF 1 TO 2 INCHES AN HOUR. SNOWFALL AMOUNTS OF 5 TO 12 INCHES WITH
LOCALLY HIGHER AMOUNTS ARE POSSIBLE BY WEDNESDAY MORNING. STRONG
NORTHWEST SUSTAINED WINDS OF 25 TO 35 MPH WITH GUSTS OVER 40 MPH ARE
EXPECTED AFTER MIDNIGHT. THIS WILL RESULT IN AREAS OF BLOWING AND
DRIFTING SNOW AND LOW VISIBILITIES PRODUCING DIFFICULT...IF NOT
IMPOSSIBLE TRAVEL CONDITIONS AT TIMES. DEPENDING ON THE EXACT TRACK
AND STRENGTH OF THIS STORM...PORTIONS OF THE OUTLOOK AREA ALONG
AND ESPECIALLY WEST OF THE MISSISSIPPI COULD EXPERIENCE BLIZZARD TO
NEAR BLIZZARD CONDITIONS TOWARD DAYBREAK WEDNESDAY.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
SNOW WILL CONTINUE THROUGH WEDNESDAY MORNING BEFORE SLOWLY ENDING
DURING THE AFTERNOON. ADDITIONAL SNOW ACCUMULATIONS OF 1 TO 2
INCHES ARE POSSIBLE.
SUSTAINED WINDS WILL INCREASE TO 25 TO 40 MPH WITH GUSTS TO 50 MPH
ON WEDNESDAY CREATING WHITEOUT CONDITIONS IN RURAL AND OPEN AREAS.
SNOW DRIFTS OF 3 TO OVER 6 FEET WILL BECOME COMMON BY AFTERNOON.
TRAVEL WILL DIFFICULT IF NOT IMPOSSIBLE. BLIZZARD OR NEAR BLIZZARD
CONDITIONS ARE PROBABLE WEDNESDAY INTO WEDNESDAY EVENING.
FALLING TEMPERATURES AND VERY STRONG WINDS WILL CREATE DANGEROUS
WIND CHILLS STARTING WEDNESDAY EVENING AND CONTINUING INTO THURSDAY
MORNING. HEADLINES FOR DANGEROUS WIND CHILLS MAY BE NEEDED AT SOME
POINT IN THE FUTURE.
THIS IS A PARTICULARLY DANGEROUS STORM THAT COULD RESULT IN PROLONGED
POWER OUTAGES OVER LARGE AREAS AND DAMAGE FROM FALLEN TREES OR LARGE
TREE LIMBS. INTERESTED INDIVIDUALS SHOULD MONITOR THIS PRODUCT AND
OTHER LOCAL OFFICE WINTER WEATHER PRODUCTS FOR FURTHER UPDATES AND
MORE SPECIFICS ON THIS POWERFUL SYSTEM AND PLAN ACCORDINGLY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER REPORTS REGARDING SNOWFALL AMOUNTS AND WINTER WEATHER
IMPACTS WILL BE GREATLY APPRECIATED TODAY THROUGH WEDNESDAY.
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