Winter Storm Watch 7, NWS Sioux Falls, SD

Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD, Union County, SD, Yankton County, SD

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HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
0632 AM CST MON DEC 21 2009

SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-221200-
AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA-
CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE-
DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON-
IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN-
LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN-
OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN-
SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON-
0632 AM CST MON DEC 21 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA...
SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA.

.DAY ONE...TODAY AND TONIGHT

WINTER WEATHER...
A BAND OF SNOW SHOULD DEVELOP THIS AFTERNOON AND EVENING...MAINLY
NORTH OF INTERSTATE 90 IN SOUTH DAKOTA...TO SOUTHWEST
MINNESOTA...AND FAR NORTHERN PARTS OF NORTHWEST IOWA. GENERALLY 1
TO 3 INCHES SNOWFALL IS EXPECTED...BUT LOCAL AMOUNTS UP TO 4
INCHES IS POSSIBLE ON A LINE FROM NEAR BROOKINGS SOUTH DAKOTA TO
JACKSON MINNESOTA...INCLUDING LOCATIONS NEAR THE BUFFALO RIDGE.
ALSO PATCHY LIGHT FREEZING RAIN OR FREEZING DRIZZLE IS POSSIBLE
ALONG THE MISSOURI VALLEY TO SOUTHERN PARTS OF NORTHWEST IOWA
FROM LATER THIS AFTERNOON INTO TONIGHT.

WIND AND FOG...
WIDESPREAD FOG...DENSE IN PLACES WITH VISIBILITIES AT OR BELOW A
QUARTER MILE...WILL GRADUALLY LIFT BY LATE MORNING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

AREAS OF FREEZING DRIZZLE SHOULD DEVELOP OVER THE AREA TUESDAY
AND TUESDAY NIGHT...AS MILD AIR ALOFT OVERRUNS COLD MOIST AIR
NEAR THE SURFACE. THEN SNOW SHOULD SPREAD NORTH OVER THE AREA
THROUGH WEDNESDAY...AS A MAJOR WINTER STORM SYSTEM DEVELOPS IN
THE PLAINS.

THERE IS THE POTENTIAL FOR A SIGNIFICANT WINTER STORM TO AFFECT A
GOOD PART OF THE AREA FROM WEDNESDAY THROUGH FRIDAY. AT THIS TIME
THE BEST POTENTIAL FOR HEAVY SNOW IS SOUTHEAST OF A LINE FROM
BROOKINGS TO SPRINGFIELD SOUTH DAKOTA...BUT THIS COULD SHIFT
NORTHWEST WITH LATER FORECASTS. IN ADDITION TO THE HEAVY
SNOW...STRONG WINDS LOOK TO CREATE AREAS OF BLOWING AND DRIFTING
SNOW MAKING TRAVEL TREACHEROUS. THE PRECISE TRACK OF THIS SYSTEM
IS UNCERTAIN AT THIS POINT...BUT THOSE WITH TRAVEL PLANS SHOULD
STAY TUNED TO THE LATEST INFORMATION REGARDING THIS MAJOR WINTER
STORM.

.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.

RSR