HAZARDOUS WEATHER OUTLOOK
Issue Date: 0549 AM CST THU DEC 24 2009
Expiration: 600 AM CST FRI DEC 25 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA...
SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA.
.DAY ONE...TODAY AND TONIGHT
WINTER WEATHER...
MAINLY LIGHT SNOWFALL WILL PREVAIL DURING THE DAY TODAY...BUT
SOME MORE SIGNIFICANT SNOWFALL WILL START TO PUSH INTO NORTHWEST
IOWA TOWARD SUNSET. ACCUMULATION OF SNOWFALL BY SUNDOWN IS
EXPECTED TO BE GENERALLY ONE TO TWO INCHES...GREATEST THROUGH
NORTHWEST IOWA.
WINDS WILL CONTINUE TO INCREASE FROM WEST TO EAST THROUGH THE
DAY... WITH WINDS ALONG THE INTERSTATE 29 CORRIDOR INCREASING
MIDDAY...AND LATER IN THE DAY TO THE EAST. WINDS SHOULD REACH
20 TO 35 MPH FROM THE NORTH OR NORTHWEST...WHICH WILL PRODUCE
AN INCREASING AMOUNT OF BLOWING AND DRIFTING SNOW GOING THROUGH
THE AFTERNOON.
CONDITIONS WILL DETERIORATE SIGNIFICANTLY TONIGHT AS THE MAIN
PORTION OF THE MAJOR WINTER STORM MOVES INTO THE REGION. STRONG
NORTHERLY WINDS FROM 25 TO 40 MPH WILL COMBINE WITH SNOW EXPECTED
TO SPREAD FROM SOUTHEAST TO NORTHWEST ACROSS THE AREA. THE SNOW
WILL BECOME HEAVY AT TIMES...AND AREAS OF WHITEOUT CONDITIONS
WILL BE POSSIBLE.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
THE MAJOR WINTER STORM WILL CONTINUE TO AFFECT THE AREA CHRISTMAS
DAY THROUGH A GOOD PORTION OF SATURDAY...DUE TO A VERY SLOW
MOVEMENT...BRINGING BLIZZARD TO NEAR BLIZZARD CONDITIONS...AND A
STORM TOTAL SNOWFALL IN EXCESS OF A FOOT MOST AREAS. A MAXIMUM OF
16 TO 19 INCHES IS EXPECTED FROM EAST CENTRAL SOUTH DAKOTA INTO
SOUTHWEST MINNESOTA. SUCH LARGE AMOUNTS OF SNOWFALL AND STRONG
NORTHERLY WINDS WILL BE FAVORABLE TO PRODUCE EXTREME DRIFTING
SNOW...WITH POTENTIAL FOR DRIFTS FROM 5 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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