Wind Chill Advisory 2, NWS Sioux Falls, SD

673 
WWUS43 KFSD 021709
WSWFSD

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1109 AM CST SAT JAN 2 2010

SDZ038-039-050-052>055-057>061-063>066-068-069-021815-
/O.CAN.KFSD.WC.Y.0002.000000T0000Z-100102T2100Z/
BEADLE-KINGSBURY-GREGORY-JERAULD-SANBORN-MINER-LAKE-BRULE-AURORA-
DAVISON-HANSON-MCCOOK-CHARLES MIX-DOUGLAS-HUTCHINSON-TURNER-
BON HOMME-YANKTON-
INCLUDING THE CITIES OF...HURON...DE SMET...ARLINGTON...
LAKE PRESTON...GREGORY...BURKE...WESSINGTON SPRINGS...ALPENA...
WOONSOCKET...HOWARD...MADISON...CHAMBERLAIN...KIMBALL...
PLANKINTON...WHITE LAKE...STICKNEY...MITCHELL...ALEXANDRIA...
EMERY...SALEM...CANISTOTA...BRIDGEWATER...MONTROSE...WAGNER...
PLATTE...LAKE ANDES...MARTY...ARMOUR...CORSICA...DELMONT...
PARKSTON...FREEMAN...MENNO...TRIPP...PARKER...CENTERVILLE...
MARION...VIBORG...HURLEY...CHANCELLOR...TYNDALL...SCOTLAND...
SPRINGFIELD...AVON...TABOR...YANKTON
1109 AM CST SAT JAN 2 2010

...WIND CHILL ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS CANCELLED THE
WIND CHILL ADVISORY. 

WHILE THE EXTREME COLD WIND CHILL VALUES ARE NO LONGER
ANTICIPATED...WIND CHILL READINGS WILL STILL AVERAGE 10 TO 20
BELOW ZERO THROUGH THE AFTERNOON. 

$$

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
404 AM CST SAT JAN 2 2010

.DISCUSSION...

THE STORY FOR THE NEXT SEVERAL DAYS IS CONTINUED MUCH BELOW NORMAL
TEMPERATURES WITH THE REGION REMAINING UNDER THE INFLUENCE OF ARCTIC
AIR...WITH PERIODIC SHOTS OF SNOW...PRIMARILY IN OUR WEST...AS A
SERIES OF SHORTWAVES DROP SOUTHWARD ON A NORTHWESTERLY UPPER LEVEL
FLOW.

PRESENT SURFACE ANALYSIS INDICATING SURFACE HIGH PRESSURE AXIS
LOCATED OVER THE EASTERN PORTIONS OF THE DAKOTAS AND NEBRASKA...WITH
MAINLY CLEAR SKIES AND TEMPERATURES RANGING FROM AROUND 25 TO 30
BELOW ZERO COLLOCATED WITH THE VERY LIGHT WINDS UNDER THE RIDGE
AXIS. TO THE WEST...BEGINNING TO SEE AN INCREASE IN CLOUDS OVER THE
WESTERN HIGH PLAINS WITH MID LEVEL WAA IN ADVANCE OF THE NEXT WAVE
TO AFFECT THE REGION.

TEMPERATURES TODAY ARE GOING NOWHERE...COMING IN A COUPLE OF DEGREES
COOLER THAN YESTERDAY AND STAYING AT OR BELOW ZERO OVER ALL BUT THE
SOUTHWESTERN PORTIONS OF OUR CWA. WILL SEE WINDS PICK UP A BIT IN
OUR WEST TODAY AS A THE SURFACE RIDGE BEGINS TO MOVE EASTWARD...AND
WE COME UNDER THE INFLUENCE OF A RETURNING SOUTHERLY FLOW ON THE
BACKSIDE OF THE HIGH. NOT REAL WINDY...IN THE 10 TO 15 KT
RANGE...BUT THESE WINDS IN COMBINATION WITH THE BITTERLY COLD
TEMPERATURES WILL RESULT IN WINDS CHILLS OF 25 TO 35 BELOW OVER THIS
AREA UNTIL LATE IN THE AFTERNOON. IN LIGHT OF THAT...WENT AHEAD AND
ISSUED A WIND CHILL ADVISORY FOR THE JAMES RIVER VALLEY. DID NOT GO
ANY FARTHER EAST...IN SPITE OF THE FACT THAT APPARENT TEMPERATURES
WILL BE SIMILAR TO THOSE IN THE WEST...BUT WINDS WILL REMAIN VERY
LIGHT...AROUND 5 KTS. MID LEVEL SHORTWAVE PUSHES OUT WYOMING THROUGH
THE DAY...AND WITH THE WAA AND A PV ANOMALY SLIDING ACROSS OUR
WEST...WILL SEE LIGHT SNOW DEVELOP OVER THAT AREA BY LATE AFTERNOON
OR EVENING.

WILL SEE A CHANCE OF LIGHT SNOW CONTINUE OVER THE WESTERN TWO THIRDS
OF OUR CWA THROUGH AT LEAST TONIGHT AND TOMORROW AS A SERIES OF
SHORTWAVES TRACK ACROSS THE REGION AND A PRETTY DECENT LOWER LEVEL
THERMAL BOUNDARY SETS UP OVER CENTRAL SOUTH DAKOTA. NOT EXPECTING
MUCH IN THE WAY OF ACCUMULATION...FROM AROUND A HALF AN INCH ALONG
THE I 29 CORRIDOR TO NEAR 2 INCHES IN OUR SOUTHWEST. WITH THE CLOUD
COVER AND SLIGHTLY HIGHER WINDS...TEMPERATURES WILL BE WARMER TONIGHT
OVER MOST OF THE CWA...FROM NEAR ZERO IN OUR SOUTHWEST TO THE SINGLE
DIGITS BELOW ZERO THROUGH OUR CENTRAL AND SOUTHERN LOCALES. OUR
NORTHEAST AND FAR EASTERN AREAS MAY STILL DROP DOWN INTO THE MID
TEENS BELOW ZERO WITH LIGHTER WINDS AND LESS CLOUD COVER THAN AREAS
TO THE WEST. HIGHS ON SUNDAY WILL ALSO BE WARMER...IN THE SINGLE
DIGITS ABOVE IN OUR EAST TO LOWER TEENS SOUTHWEST.

LIGHT SNOW OR FLURRIES MAY LINGER IN OUR WEST ON SUNDAY NIGHT INTO
MONDAY MORNING WITH WEAK WEAK FORCING REMAINING. ARCTIC HIGH
PRESSURE BUILDS BACK INTO THE REGION FOR LATER ON MONDAY INTO
TUESDAY...KEEPING MUCH BELOW NORMAL TEMPERATURES IN PLACE...BUT
LOOKS TO BE DRY UNTIL LATER ON TUESDAY. MODELS CONTINUE TO POINT
TOWARD A MORE SIGNIFICANT SYSTEM AFFECTING THE REGION ON TUESDAY
NIGHT AND WEDNESDAY.  /JM

&&

.AVIATION...

PRIMARILY VFR CONDITIONS EXPECTED TODAY AS ARCTIC HIGH PRESSURE OVER
THE AREA EARLY THIS MORNING SHIFTS EAST. EXTREME COLD COULD LEAD TO
SOME AREAS OF ICE CRYSTALS IN TYPICAL LOW LYING AREAS ALONG AND EAST
OF I-29...INCLUDING KFSD AND KSUX...THROUGH 15-16Z. WEAK UPPER WAVE
WILL MOVE INTO THE REGION TONIGHT...BRINGING CHANCE OF -SN TO AREAS
NEAR/WEST OF I-29 THROUGH 12Z. BEST CHANCE FOR -SN ALONG/WEST OF THE
JAMES RIVER...AND WILL CONTINUE WITH MVFR VSBYS IN -SN FOR KHON TAF
LOCATION AFTER 03/03Z-04Z. PERIODS OF MVFR CIGS/IFR VSBYS POSSIBLE
THERE AFTER 03/08Z.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...

IA...NONE.
MN...NONE.
NE...NONE.
SD...WIND CHILL ADVISORY UNTIL 3PM CST THIS AFTERNOON FOR
     SDZ038-039- 050-052>055-057>061-063>066-068-069.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
0444 AM CST FRI JAN 01 2010

SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-021200-
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-
0444 AM CST FRI JAN 01 2010

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

.DAY ONE...TODAY AND TONIGHT

WINTER WEATHER...

A PERIOD OF LIGHT SNOW FROM THIS MORNING INTO THE EARLY AFTERNOON
WILL LEAVE BEHIND LESS THAN AN INCH OF SNOW MAINLY FROM
CHAMBERLAIN AND MITCHELL THROUGH THE MISSOURI RIVER CORRIDOR.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

LIGHT SNOW WILL DEVELOP ON SATURDAY AFTERNOON THROUGH CENTRAL
SOUTH DAKOTA...THEN PUSH TO THE SOUTH AND EAST ON SATURDAY NIGHT.
THE MAIN AREAS AFFECTED WOULD BE THE JAMES RIVER VALLEY AND
THROUGH THE MISSOURI RIVER CORRIDOR. SNOWFALL IS EXPECTED TO BE
LIGHT...WITH HIGHEST AMOUNTS ALONG THE MISSOURI RIVER CORRIDOR
WHERE AROUND 2 INCHES MAY ACCUMULATE.

.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.