HAZARDOUS WEATHER OUTLOOK
Issue Date: 1019 AM CST WED DEC 23 2009
Expiration: 600 AM CST THU DEC 24 2009

Expires:200912241200;;
FLUS43 KFSD 231614
HWOFSD
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1013 AM CST WED DEC 23 2009
SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-241200-
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-
1013 AM CST WED DEC 23 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA...
SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA.
.DAY ONE...TODAY AND TONIGHT
WINTER WEATHER...
AREAS OF FOG AND FREEZING DRIZZLE WILL CONTINUE TO CREATE THIN
ICE DEPOSITS THROUGH THIS AFTERNOON. SNOW WILL SPREAD STEADILY
INTO THE AREA FROM THE SOUTH THIS AFTERNOON AND EARLY EVENING.
SNOW WILL BECOME HEAVY AT TIMES LATE THIS AFTERNOON AND TONIGHT.
ACCUMULATIONS THROUGH TONIGHT WILL VARY FROM AROUND 3 INCHES WEST
OF THE JAMES RIVER...TO AROUND 6 INCHES EAST OF INTERSTATE 29.
THE SNOW MAY BE MIXED WITH SLEET AND FREEZING RAIN FROM SIOUX
CITY TO STORM LAKE THIS AFTERNOON...AND SOUTHEAST OF A LINE FROM
SIOUX CITY TO SPENCER IOWA LATE TONIGHT. ICE ACCUMULATIONS UP TO
A TENTH OF AN INCH ARE POSSIBLE IN THE STORM LAKE AREA.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
A MAJOR WINTER STORM WILL CONTINUE TO MOVE SLOWLY THROUGH THE
AREA THURSDAY AND CHRISTMAS DAY. 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 CHRISTMAS
DAY...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 IN EXCESS OF 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.
$$

WINTER STORM WARNING
Issue Date: 448 AM CST WED DEC 23 2009
Expiration: 600 AM CST SAT DEC 26 2009

...HOLIDAY TRAVEL TO BE SEVERELY IMPACTED BY SIGNIFICANT WINTER
STORM BEGINNING WEDNESDAY...
.THIS IS A LIFE THREATENING SYSTEM AND ANY TRAVEL FROM WEDNESDAY
NIGHT INTO FRIDAY NIGHT WILL BE TREACHEROUS. THIS IS A PROLONGED
WINTER WEATHER EVENT...WITH THE STORM EJECTING FROM THE ROCKIES IN
TWO OR THREE SYSTEMS. THEREFORE SNOWFALL ACCUMULATIONS ARE
EXPECTED TO BE MAJOR LATE THIS WEEK. THE STRONG WINDS WILL MAKE
TRAVEL EXTREMELY DIFFICULT...ESPECIALLY AS THURSDAY PROGRESSES AND
LASTING THROUGH FRIDAY AND FRIDAY NIGHT. DO NOT TRAVEL UNLESS
ABSOLUTELY NECESSARY IN THIS AREA.
IAZ001>003-012>014-020>022-031-032-MNZ089-090-098-NEZ013-014-
SDZ050-057>071-231900-
/O.NEW.KFSD.WW.Y.0025.091223T1048Z-091223T1800Z/
/O.EXT.KFSD.WS.W.0008.091223T2100Z-091226T1200Z/
LYON-OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-PLYMOUTH-CHEROKEE-
BUENA VISTA-WOODBURY-IDA-NOBLES-JACKSON-ROCK-DIXON-DAKOTA-GREGORY-
BRULE-AURORA-DAVISON-HANSON-MCCOOK-MINNEHAHA-CHARLES MIX-DOUGLAS-
HUTCHINSON-TURNER-LINCOLN-BON HOMME-YANKTON-UNION-
INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD...
LARCHWOOD...SIBLEY...SPIRIT LAKE...MILFORD...ARNOLDS PARK...
ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY...SANBORN...
SPENCER...LE MARS...CHEROKEE...STORM LAKE...SIOUX CITY...
IDA GROVE...HOLSTEIN...BATTLE CREEK...WORTHINGTON...JACKSON...
LAKEFIELD...LUVERNE...WAKEFIELD...PONCA...ALLEN...
SOUTH SIOUX CITY...GREGORY...BURKE...CHAMBERLAIN...KIMBALL...
PLANKINTON...WHITE LAKE...STICKNEY...MITCHELL...ALEXANDRIA...
EMERY...SALEM...CANISTOTA...BRIDGEWATER...MONTROSE...
SIOUX FALLS...WAGNER...PLATTE...LAKE ANDES...MARTY...ARMOUR...
CORSICA...DELMONT...PARKSTON...FREEMAN...MENNO...TRIPP...PARKER...
CENTERVILLE...MARION...VIBORG...HURLEY...CHANCELLOR...CANTON...
LENNOX...TEA...HARRISBURG...TYNDALL...SCOTLAND...SPRINGFIELD...
AVON...TABOR...YANKTON...VERMILLION...NORTH SIOUX CITY...
BERESFORD...ELK POINT...ALCESTER...JEFFERSON
448 AM CST WED DEC 23 2009
...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON CST TODAY...
...WINTER STORM WARNING NOW IN EFFECT FROM 3 PM THIS AFTERNOON TO
6 AM CST SATURDAY...
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER
WEATHER ADVISORY FOR FREEZING MIST AND LIGHT FREEZING DRIZZLE...
WHICH IS IN EFFECT UNTIL NOON CST TODAY. THE WINTER STORM WARNING
IS NOW IN EFFECT FROM 3 PM THIS AFTERNOON TO 6 AM CST SATURDAY.
* TIMING...LIGHT FREEZING DRIZZLE WILL BE A PROBLEM ON UNTREATED
ROAD SURFACES THROUGH MIDDAY. SNOW WILL THEN SPREAD NORTH INTO
THE AREA THIS AFTERNOON. IN ADDITION...ENOUGH WARM AIR ALOFT IS
WRAPPING INTO THIS SYSTEM...THAT THE STORM LAKE IOWA HAS A
THREAT OF SEEING A WINTRY MIX OF SLEET LATE TONIGHT AND
THURSDAY. ALTHOUGH THE SNOW WILL DIMINISH FROM TIME TO TIME...
THE SNOW WILL PERSIST THROUGH FRIDAY NIGHT...MODERATE TO HEAVY
AT TIMES.
* ACCUMULATIONS...ALL TOLD FROM TONIGHT THROUGH FRIDAY NIGHT...
SNOWFALL TOTALS OF 12 TO 18 INCHES ARE EXPECTED. SOME AMOUNTS
NEAR 20 INCHES ARE NOT OUT OF THE QUESTION ALONG I 90 IN
SOUTHWEST MINNESOTA. ICE ACCUMULATIONS TODAY WILL BE EXTREMELY
MINIMAL.
* WIND AND VISIBILITY...WINDS WILL TURN TO THE NORTH AND NORTHWEST
ON THURSDAY...LASTING THROUGH FRIDAY NIGHT. 20 TO 35 MPH WINDS
WILL BE COMMON ON THURSDAY...INCREASING ON FRIDAY TO 25 TO 40
MPH. THE STRONGEST WINDS WILL BE ALONG AND WEST OF THE JAMES
RIVER VALLEY IN SOUTHEAST AND SOUTH CENTRAL SOUTH DAKOTA. THE
WIND COMBINED WITH THE SNOWFALL WILL LIKELY REDUCE VISIBILITIES
TO NEAR ZERO AT TIMES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW
ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS...IF NOT IMPOSSIBLE
AT TIMES. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN
EXTRA FLASHLIGHT...FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY.
$$
MJF

WINTER STORM WATCH
Issue Date: 202 PM CST MON DEC 21 2009
Expiration: 600 PM CST FRI DEC 25 2009

.A MAJOR WINTER STORM IS POSSIBLE ACROSS THE REGION WEDNESDAY INTO
FRIDAY AS STRONG LOW PRESSURE DEVELOPS ACROSS THE SOUTHERN PLAINS
ON WEDNESDAY AND MOVES NORTH INTO IOWA BY FRIDAY MORNING. SNOW WILL
BECOME WIDESPREAD ON WEDNESDAY...TAPER OFF WEDNESDAY AND THEN
BECOME WIDESPREAD THURSDAY AND THURSDAY NIGHT. HEAVY SNOW IN
EXCESS OF 10 INCHES WILL BE POSSIBLE WITH THIS STORM. STRONG NORTH
WINDS WILL DEVELOP ON THURSDAY AND CREATE WIDESPREAD BLOWING SNOW
THURSDAY INTO FRIDAY.
IAZ001>003-012>014-020>022-031-032-MNZ089-090-098-NEZ013-014-
SDZ050-057>071-220415-
/O.NEW.KFSD.WS.A.0007.091223T1800Z-091226T0000Z/
LYON-OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-PLYMOUTH-CHEROKEE-
BUENA VISTA-WOODBURY-IDA-NOBLES-JACKSON-ROCK-DIXON-DAKOTA-GREGORY-
BRULE-AURORA-DAVISON-HANSON-MCCOOK-MINNEHAHA-CHARLES MIX-DOUGLAS-
HUTCHINSON-TURNER-LINCOLN-BON HOMME-YANKTON-UNION-
INCLUDING THE CITIES OF...ROCK RAPIDS...GEORGE...INWOOD...
LARCHWOOD...SIBLEY...SPIRIT LAKE...MILFORD...ARNOLDS PARK...
ORANGE CITY...SIOUX CENTER...SHELDON...HARTLEY...SANBORN...
SPENCER...LE MARS...CHEROKEE...STORM LAKE...SIOUX CITY...
IDA GROVE...HOLSTEIN...BATTLE CREEK...WORTHINGTON...JACKSON...
LAKEFIELD...LUVERNE...WAKEFIELD...PONCA...ALLEN...
SOUTH SIOUX CITY...GREGORY...BURKE...CHAMBERLAIN...KIMBALL...
PLANKINTON...WHITE LAKE...STICKNEY...MITCHELL...ALEXANDRIA...
EMERY...SALEM...CANISTOTA...BRIDGEWATER...MONTROSE...
SIOUX FALLS...WAGNER...PLATTE...LAKE ANDES...MARTY...ARMOUR...
CORSICA...DELMONT...PARKSTON...FREEMAN...MENNO...TRIPP...PARKER...
CENTERVILLE...MARION...VIBORG...HURLEY...CHANCELLOR...CANTON...
LENNOX...TEA...HARRISBURG...TYNDALL...SCOTLAND...SPRINGFIELD...
AVON...TABOR...YANKTON...VERMILLION...NORTH SIOUX CITY...
BERESFORD...ELK POINT...ALCESTER...JEFFERSON
202 PM CST MON DEC 21 2009
...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
FRIDAY AFTERNOON...
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER
STORM WATCH...WHICH IS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
FRIDAY AFTERNOON.
* TIMING...SNOW WILL SPREAD NORTH ACROSS THE AREA ON
WEDNESDAY...TAPER OFF WEDNESDAY NIGHT...AND BECOME WIDESPREAD
AGAIN THURSDAY AND THURSDAY NIGHT.
* ACCUMULATIONS...SNOWFALL TOTALS OF 10 TO 20 INCHES WILL BE
POSSIBLE WITH THIS STORM WITH THE HEAVIEST AMOUNTS LIKELY ACROSS
NORTHWEST IOWA.
* WIND AND VISIBILITY...NORTHEAST WINDS OF 10 TO 20 MPH CAN BE
EXPECTED WEDNESDAY AND WEDNESDAY AND INCREASE TO 25 TO 35 MPH
OUT OF THE NORTH THURSDAY THROUGH FRIDAY. THE WIND COMBINED WITH
THE SNOW MAY REDUCE VISIBILITIES TO NEAR ZERO AT TIMES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
$$