HAZARDOUS WEATHER OUTLOOK
Issue Date: 532 AM CST TUE DEC 22 2009
Expiration: 600 AM CST WED DEC 23 2009

Expires:200912231200;;
FLUS43 KFSD 221130
HWOFSD
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
0530 AM CST TUE DEC 22 2009
SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-231200-
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-
0530 AM CST TUE DEC 22 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 LIGHT FREEZING DRIZZLE AND A FEW FLURRIES MAY MAKE FOR
SOME SLIPPERY TRAVEL TODAY AND TONIGHT.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
A MAJOR WINTER STORM WILL MOVE SLOWLY THROUGH THE AREA FROM
WEDNESDAY AFTERNOON THROUGH FRIDAY. IT APPEARS THE HEAVIEST
SNOWFALL OF 13 TO 17 INCHES SHOULD BE WEST OF INTERSTATE
29...WITH GRADUALLY LESSER AMOUNTS EXPECTED EAST OF INTERSTATE
29...BUT STILL APPROACHING A FOOT IN MANY AREAS. THE STRONG LOW
PRESSURE SYSTEM MOVING NORTHWARD FROM MISSOURI TO IOWA THROUGH
THURSDAY WILL BRING SOME MILDER AIR ALOFT INTO NORTHWEST
IOWA...WHERE PRECIPITATION SHOULD BE A MIX OF SNOW...
FREEZING RAIN...AND SLEET FROM WEDNESDAY INTO THURSDAY...BEFORE
CHANGING TO ALL SNOW BY LATE THURSDAY. STRONG NORTHERLY WINDS
WILL KICK IN ON THE BACKSIDE OF THE LOW PRESSURE THURSDAY
AFTERNOON AND EVENING...CAUSING WIDESPREAD BLOWING SNOW...IF NOT
BLIZZARD CONDITIONS...TO DEVELOP. THE SNOW AND BLOWING SNOW
SHOULD GRADUALLY TAPER OFF FROM WEST TO EAST OVER THE AREA FRIDAY
NIGHT INTO SATURDAY MORNING.
.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: 430 AM CST TUE DEC 22 2009
Expiration: 600 PM CST FRI DEC 25 2009

...HOLIDAY TRAVEL TO BE SEVERELY IMPACTED BY SIGNIFICANT WINTER
STORM THE LAST HALF OF THE WEEK...
.A DANGEROUS AND POTENTIALLY LIFE THREATENING WINTER STORM IS
EXPECTED TO IMPACT MUCH OF THE REGION WEDNESDAY THROUGH FRIDAY.
STRONG LOW PRESSURE WILL DEVELOP ACROSS THE SOUTHERN PLAINS ON
WEDNESDAY...AND INTENSIFY AS IT MOVES SLOWLY NORTHWARD INTO IOWA
ON FRIDAY. THE FIRST ROUND OF SNOWFALL WILL START ON WEDNESDAY...
BUILDING NORTHWARD OUT OF NEBRASKA AND IOWA AND BECOMING
WIDESPREAD DURING THE AFTERNOON AND NIGHTTIME HOURS. WARMER
TEMPERATURES ALOFT WILL CREATE POTENTIAL FOR FREEZING RAIN AND
SLEET THROUGH MUCH OF NORTHWEST IOWA...NORTHEAST NEBRASKA...AND
EXTREME SOUTHEAST SOUTH DAKOTA WEDNESDAY NIGHT INTO THURSDAY. THE
GREATEST THREAT FOR PERSISTENT SNOWFALL APPEARS TO HAVE SHIFTED
MORE TO THE NORTHWEST THROUGH THE EARLY PARTS OF THE STORM...FAVORING
HEAVIER SNOWFALL THROUGH EASTERN SOUTH DAKOTA AND NORTHERN PORTIONS
OF SOUTHWEST MINNESOTA.
AS THE LOW PRESSURE AREA STRENGTHENS THURSDAY AND THURSDAY NIGHT...
NORTH TO NORTHEAST WINDS WILL INCREASE...WITH WIDESPREAD SNOW AND
BLOWING SNOW THURSDAY NIGHT INTO FRIDAY. WITH GUSTY WINDS LIKELY
TO REACH 25 TO 35 MPH LATER THURSDAY THROUGH FRIDAY...AREAS OF
BLIZZARD OR NEAR BLIZZARD CONDITIONS APPEAR PROBABLE.
HEAVY SNOW IN EXCESS OF 10 INCHES IS LIKELY WITH THIS STORM...
WITH SOME AMOUNTS IN EXCESS OF 15 INCHES ESPECIALLY THROUGH
SOUTHEAST SOUTH DAKOTA. ICE ACCUMULATIONS FROM A QUARTER TO A
THIRD OF AN INCH WILL ALSO BE POSSIBLE FOR AREAS ROUGHLY SOUTHEAST
OF A SIOUX CITY TO SPENCER LINE.
LEADING INTO THE SYSTEM TODAY AND TONIGHT...AREAS OF FREEZING
DRIZZLE ARE POSSIBLE.
SDZ050-057>070-221830-
/O.UPG.KFSD.WS.A.0007.091223T1800Z-091226T0000Z/
/O.NEW.KFSD.WS.W.0008.091223T1800Z-091226T0000Z/
GREGORY-BRULE-AURORA-DAVISON-HANSON-MCCOOK-MINNEHAHA-CHARLES MIX-
DOUGLAS-HUTCHINSON-TURNER-LINCOLN-BON HOMME-YANKTON-CLAY-
INCLUDING THE CITIES OF...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
430 AM CST TUE DEC 22 2009
...WINTER STORM WARNING IN EFFECT FROM NOON WEDNESDAY TO 6 PM CST
FRIDAY...
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER
STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW...WHICH IS IN EFFECT
FROM NOON WEDNESDAY TO 6 PM CST FRIDAY. THE WINTER STORM WATCH IS
NO LONGER IN EFFECT.
* TIMING...SNOW WILL SPREAD NORTH ACROSS THE AREA ON WEDNESDAY.
THERE COULD BE A BRIEF PERIOD FOR SLEET OR FREEZING RAIN TOWARD
THE IOWA BORDER LATER WEDNESDAY NIGHT OR THURSDAY. SNOW WILL
BECOME WIDESPREAD AGAIN THURSDAY NIGHT INTO EARLY FRIDAY.
* ACCUMULATIONS...SNOWFALL TOTALS OF 12 TO 18 INCHES ARE
ANTICIPATED WITH THIS STORM...WITH THE HEAVIEST AMOUNTS LIKELY
ACROSS SOUTHEAST SOUTH DAKOTA.
* WIND AND VISIBILITY...NORTHEAST WINDS OF 10 TO 20 MPH CAN BE
EXPECTED WEDNESDAY...INCREASING GRADUALLY THROUGH WEDNESDAY
NIGHT...AND REACHING 25 TO 35 MPH OUT OF THE NORTH THURSDAY
THROUGH FRIDAY. 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. ONLY TRAVEL IN AN
EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD...
AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.
$$

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.
$$