HAZARDOUS WEATHER OUTLOOK
Issue Date: 555 AM CST THU DEC 24 2009
Expiration: 600 AM CST FRI DEC 25 2009

Expires:200912251200;;
FLUS43 KFSD 241149
HWOFSD
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
0549 AM CST THU DEC 24 2009
SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-251200-
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-
0549 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...
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.
$$

WINTER STORM WARNING
Issue Date: 400 AM CST THU DEC 24 2009
Expiration: 1200 PM CST SAT DEC 26 2009

...CHRISTMAS TRAVEL WILL BE SEVERELY IMPACTED BY A SIGNIFICANT
WINTER STORM...
.THIS IS A LIFE THREATENING SYSTEM AND ANY TRAVEL FROM TONIGHT
THROUGH SATURDAY WILL BE TREACHEROUS...IF NOT NEARLY IMPOSSIBLE IN
MANY AREAS. THIS IS A PROLONGED WINTER WEATHER EVENT. AFTER A
RELATIVE LULL TODAY...THE STORM WILL REALLY BEGIN TO ORGANIZE
TONIGHT...WITH SURFACE LOW PRESSURE TRACKING NORTHWARD UP THE
MISSISSIPPI VALLEY. THE LOW WILL THEN MEANDER AROUND IOWA FRIDAY
AND FRIDAY NIGHT...BEFORE MOVING SLIGHTLY EASTWARD ON SATURDAY.
NORTH TO NORTHWEST WINDS WILL STEADILY INCREASE TODAY...TOPPING
OUT ON CHRISTMAS DAY AVERAGING 25 TO 40 MPH. WIDESPREAD SNOW
ACCUMULATIONS OF MORE THEN A FOOT WILL OCCUR BY SATURDAY
AFTERNOON. COUPLED WITH THE WIND...5 TO 10 FOOT DRIFTS ARE NOT OUT
OF THE QUESTION IN RURAL AREAS.
ALSO...A LAYER OF ICE EXISTS UNDER THE FRESH BED OF SNOW. THIS
WILL CREATE SLIPPERY CONDITIONS...ESPECIALLY ON UNTREATED
SURFACES.
STAY ALERT FOR FUTURE STATEMENTS WHICH MAY HAVE TO BE UPGRADED
FURTHER TO INCLUDE BLIZZARD CONDITIONS.
IAZ001>003-012>014-020>022-031-032-MNZ089-090-098-NEZ013-014-
SDZ050-057>071-241800-
/O.EXT.KFSD.WS.W.0008.000000T0000Z-091226T1800Z/
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
400 AM CST THU DEC 24 2009
...WINTER STORM WARNING NOW IN EFFECT UNTIL NOON CST SATURDAY...
THE WINTER STORM WARNING IS NOW IN EFFECT UNTIL NOON CST
SATURDAY.
* TIMING...A RELATIVE QUIET TIME WILL BE IN STORE TODAY...WITH
PERIODS OF LIGHT SNOW GIVING MINOR SNOW ACCUMULATIONS. THERE
WILL EVEN BE A WINTRY MIX OF LIGHT FREEZING DRIZZLE AND SLEET
POSSIBLE THIS MORNING...GENERALLY ALONG AND EAST OF INTERSTATE
29. BUT AS THE BULK OF THE STORM ORGANIZES...WIDESPREAD SNOW AND
BLOWING SNOW WILL BEGIN TONIGHT...LASTING THROUGH SATURDAY. THE
SNOWFALL WILL BE HEAVY AT TIMES.
* ACCUMULATIONS...STORM TOTALS OF 12 TO 18 INCHES OF SNOW WILL BE
COMMON BY SATURDAY. 5 TO 10 FOOT DRIFTS ARE POSSIBLE IN RURAL AREAS.
* WIND AND VISIBILITY...NORTH TO NORTHWEST WINDS WILL STEADILY
INCREASE TODAY...TOPPING OUT ON CHRISTMAS DAY AND FRIDAY NIGHT
AT 25 TO 40 MPH. THIS WILL CREATE VISIBILITIES OF ZERO AT TIMES
IN RURAL AREAS TONIGHT THROUGH SATURDAY MORNING.
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.
$$

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.
$$