HAZARDOUS WEATHER OUTLOOK
Issue Date: 0627 AM CST WED DEC 23 2009
Expiration: 600 AM CST THU DEC 24 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA...
SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA.
.DAY ONE...TODAY AND TONIGHT
WINTER WEATHER...
WIDESPREAD LIGHT FREEZING DRIZZLE WILL CONTINUE THIS
MORNING...AND
INTO THE AFTERNOON GENERALLY NORTH OF INTERSTATE 90. THIS
FREEZING
DRIZZLE SHOULD DIMINISH AND TRANSITION TO SNOW...AS AN AREA OF
PRECIPITATION PUSHES NORTHWARD THROUGH NEBRASKA AND IOWA. THIS
SHOULD REACH THE SIOUX CITY AREA BY LATE MORNING...AND EARLY TO
MID AFTERNOON TOWARD INTERSTATE 90. SNOW WILL BECOME MORE
WIDESPREAD
AND HEAVY AT TIMES LATER THIS AFTERNOON AND TONIGHT...WITH TOTAL
SNOWFALL ACCUMULATION BY MORNING EXPECTED TO RANGE FROM 3 TO 4
INCHES
WEST OF THE JAMES RIVER...TO 5 TO 7 INCHES EAST OF INTERSTATE 29.
A LITTLE SLEET OR LIGHT FREEZING RAIN WILL BE POSSIBLE LATE THIS
AFTERNOON AND TONIGHT IN AREAS SOUTH OF A LINE FROM SPENCER IOWA
TO SIOUX CITY IOWA...WHERE ICE ACCUMULATIONS SHOULD BE LIMITED TO
AROUND A TENTH OF AN INCH.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
A MAJOR WINTER STORM WILL MOVE SLOWLY THROUGH THE AREA THURSDAY
AND FRIDAY. IT APPEARS SNOWFALL IN EXCESS OF A FOOT SHOULD BE
COMMON...WITH A MAXIMUM OF 15 TO 20 INCHES CENTERED ON AN AXIS
FROM SOUTHWEST MINNESOTA TO EXTREME SOUTHEAST SOUTH DAKOTA. THE
INTENSIFYING LOW PRESSURE SYSTEM MOVING NORTHWARD FROM MISSOURI
TO IOWA THROUGH FRIDAY WILL RESULT IN VERY STRONG NORTHERLY
WINDS...WHICH WILL LINGER INTO FRIDAY NIGHT. STRONGEST WINDS ARE
LIKELY THURSDAY NIGHT INTO FRIDAY...AND WITHOUT DOUBT WILL CAUSE
WIDESPREAD BLOWING SNOW...IF NOT BLIZZARD CONDITIONS...TO
DEVELOP. SUCH LARGE AMOUNTS OF SNOWFALL AND STRONG NORTHERLY
WINDS WILL BE FAVORABLE TO PRODUCE EXTREME DRIFTING SNOW...WITH
POTENTIAL FOR DRIFTS OF 6 TO 10 FEET TO CREATE IMPASSABLE
ROADWAYS. THE SNOW AND BLOWING SNOW SHOULD GRADUALLY TAPER OFF
FROM WEST TO EAST OVER THE AREA ON SATURDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.
&&
FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.
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