Wind Chill Advisory 9, NWS Sioux Falls, SD

791 
WWUS43 KFSD 111200
WSWFSD

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SIOUX FALLS SD
600 AM CST TUE JAN 11 2011

.AN AREA OF LOW PRESSURE WILL CONTINUE TO MOVE EAST EARLY THIS
MORNING. LIGHT SNOW OVER SOUTHWEST MINNESOTA AND NORTHWEST IOWA
WILL CONTINUE TO DECREASE. HOWEVER...STRONG WINDS COMBINED WITH
VERY COLD TEMPERATURES OVER PORTIONS OF SOUTHEAST AND SOUTH
CENTRAL SOUTH DAKOTA WILL PRODUCE DANGEROUS WIND CHILLS THIS
MORNING. FRESH POWDERY SNOW COVER COMBINED WITH THESE WINDS WILL
ALSO PRODUCE SOME BLOWING SNOW IN OPEN AREAS. EVEN WHERE
VISIBILITY IS NOT GREATLY REDUCED IN BLOWING SNOW...LOW LEVEL
DRIFTING WILL HAVE TRAVEL DIFFICULT ON SOME ROADS.

IAZ002-003-013-014-021-022-032-MNZ081-089-090-111300-
/O.EXP.KFSD.WW.Y.0025.000000T0000Z-110111T1200Z/
OSCEOLA-DICKINSON-OBRIEN-CLAY-CHEROKEE-BUENA VISTA-IDA-COTTONWOOD-
NOBLES-JACKSON-
INCLUDING THE CITIES OF...SIBLEY...SPIRIT LAKE...MILFORD...
ARNOLDS PARK...SHELDON...HARTLEY...SANBORN...SPENCER...CHEROKEE...
STORM LAKE...IDA GROVE...HOLSTEIN...BATTLE CREEK...WINDOM...
MOUNTAIN LAKE...WORTHINGTON...JACKSON...LAKEFIELD
600 AM CST TUE JAN 11 2011

...WINTER WEATHER ADVISORY WILL EXPIRE AT 6 AM CST EARLY THIS
MORNING...

THE WINTER WEATHER ADVISORY WILL EXPIRE AT 6 AM CST EARLY THIS
MORNING. 

* ACCUMULATIONS...LESS THAN A HALF INCH FOR THE REST OF THE DAY.

* WIND AND VISIBILITY...A FEW AREAS OF BLOWING SNOW WILL DEVELOP
  TODAY AS WINDS INCREASE. WHERE VISIBILITY IS NOT
  REDUCES...DRIFTING SNOW MAY STILL CAUSE LOCAL TRAVEL PROBLEMS.

$$

SDZ038-050-052-053-057>060-063>065-068-069-111800-
/O.CON.KFSD.WC.Y.0009.000000T0000Z-110111T1800Z/
BEADLE-GREGORY-JERAULD-SANBORN-BRULE-AURORA-DAVISON-HANSON-
CHARLES MIX-DOUGLAS-HUTCHINSON-BON HOMME-YANKTON-
INCLUDING THE CITIES OF...HURON...GREGORY...BURKE...
WESSINGTON SPRINGS...ALPENA...WOONSOCKET...CHAMBERLAIN...
KIMBALL...PLANKINTON...WHITE LAKE...STICKNEY...MITCHELL...
ALEXANDRIA...EMERY...WAGNER...PLATTE...LAKE ANDES...MARTY...
ARMOUR...CORSICA...DELMONT...PARKSTON...FREEMAN...MENNO...TRIPP...
TYNDALL...SCOTLAND...SPRINGFIELD...AVON...TABOR...YANKTON
600 AM CST TUE JAN 11 2011

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY...

A WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY. 

* WIND CHILL VALUES...WIND CHILLS OF 20 BELOW TO 30 BELOW ZERO 
  CAN BE EXPECTED THIS MORNING. 

* WIND AND VISIBILITY...WINDS OF 10 TO 20 MPH WITH GUSTS TO 25 
  MPH CAN BE EXPECTED THIS MORNING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND CHILL ADVISORY IS ISSUED WHEN A STRONG WIND WILL COMBINE
WITH COLD TEMPERATURES TO CREATE DANGEROUSLY COLD CONDITIONS FOR
EXPOSED SKIN.  THE WIND WILL MAKE IT FEEL LIKE IT IS 20 DEGREES
BELOW ZERO OR COLDER FOR A PERIOD OF SEVERAL HOURS.  THOSE
PLANNING TO VENTURE OUTDOORS SHOULD DRESS WARMLY...MAKING SURE
THAT ALL EXPOSED SKIN IS COVERED.

&&

$$
WILLIAMS

943 
WWUS43 KFSD 111742
WSWFSD

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1142 AM CST TUE JAN 11 2011

.NORTHWEST WINDS WILL AVERAGE 10 TO 20 MPH THROUGH THE REST OF THE
DAY WHICH WILL ALLOW WIND CHILL VALUES TO BE 15 BELOW TO 25 BELOW
ZERO.

SDZ038-050-052-053-057>060-063>065-068-069-111845-
/O.EXP.KFSD.WC.Y.0009.000000T0000Z-110111T1800Z/
BEADLE-GREGORY-JERAULD-SANBORN-BRULE-AURORA-DAVISON-HANSON-
CHARLES MIX-DOUGLAS-HUTCHINSON-BON HOMME-YANKTON-
INCLUDING THE CITIES OF...HURON...GREGORY...BURKE...
WESSINGTON SPRINGS...ALPENA...WOONSOCKET...CHAMBERLAIN...
KIMBALL...PLANKINTON...WHITE LAKE...STICKNEY...MITCHELL...
ALEXANDRIA...EMERY...WAGNER...PLATTE...LAKE ANDES...MARTY...
ARMOUR...CORSICA...DELMONT...PARKSTON...FREEMAN...MENNO...TRIPP...
TYNDALL...SCOTLAND...SPRINGFIELD...AVON...TABOR...YANKTON
1142 AM CST TUE JAN 11 2011

...WIND CHILL ADVISORY WILL EXPIRE AT NOON CST TODAY...

THE WIND CHILL ADVISORY WILL EXPIRE AT NOON CST TODAY. 

* WIND CHILL VALUES...WILL AVERAGE 15 BELOW TO 25 BELOW ZERO.

* WIND AND VISIBILITY...NORTHWEST WINDS 10 TO 20 MPH.


$$

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
908 PM CST MON JAN 10 2011

DISCUSSION...
SNOW SLOWLY WINDING DOWN THIS EVENING AS TROUGH PUSHES GRADUALLY
EWD. LITTLE IF ANY NEW SNOW ACCUMLULATIONS WEST OF I-29 THE REST OF
TONIGHT...MAYBE ANOTHER HALF INCH OR SO ALONG I-29. TOWARD
SLB...SPW...MWM...WILL SEE ANOTHER 2-3 INCHES TONIGHT THEN LITTLE IF
ANY ACCUMULATION AFTER SUNRISE TUE. EXTENDED ADVISORIES ANOTHER 6
HOURS...SO ADVISORY ALONG I-29 WILL EXPIRE AT MIDNIGHT WITH SPW TO
SLB EXPIRING AT 6 AM. SEEING SOME BLOWING IN DRIFTING WITH WINDS
INCREASING TO 15 TO 25 MPH ON THE BACKSIDE OF THE SFC TROUGH...BUT
DOES NOT QUITE STRONG ENOUGH TO EXTEND ADVISORIES ANY FURTHER IN
TIME. MAINLY EXPECTING VISIBLITIES OF A MILE OR MORE EVEN WITH GUSTS
TO 25 MPH. STILL THERE WILL BE SOME BLOWING AND DRIFTING IN OPEN
AREAS. ADJUSTED TEMPERATURES SOME FOR TONIGHT. /97

&&

.AVIATION...
WDSPRD LIGHT SNOW WILL PERSIST E OF I29 TONIGHT...GRADUALLY ENDING
TUESDAY MORNING. WDSPRD MVFR CIGS WL GRADUALLY BECOME VFR ON
TUESDAY. AREAS OF BLOWING SNOW WL DEVELOP LATER TONIGHT W OF I29 AND
SPREAD E ON TUESDAY. VSBYS WL REMAIN BLO 3SM E OF I29 TONIGHT WITH
VSBYS OCNLY DROPPING BLO 3SM W OF I29.

&&

.PREV DISCUSSION...
ONGOING WINTRY SYSTEM ACRS NRN PLAINS WITH STRONG WAVE PUSHING THRU
ERN NEBRASKA ATTM...AND STRONG INVERTED TROUGH NOW PIVOTING FROM E
OF KHON TO NR KFSD TO JUST E OF KSUX. GENERALLY 5 TO 12 INCHES
SNOWFALL ACRS AREA...WITH LEAST ALG HWY 14 AREAS TOWARD MN
BORDER...AND ALSO DOWN THE I29 CORRIDOR TOWARD KFSD AND CANTON. BULK
OF MORE SIGNIFICANT SNOWFALL OCCURRING IN AREAS ALG/AHEAD OF THIS
FEATURE... CORRESPONDING TO STRONG AREA OF LOW TO MID LVL
FRONTOGENESIS WHICH HAS BEEN HOLDING PLACE...OR SLIDING GRADUALLY
EWRD AT LOWER LVLS THRU THE AFTN. TEMPERATURES COOLING ENOUGH THAT
THE MORE DEEP DENDRITIC ZONE IS ACRS THE ERN CWA MID AFTN...AND
BECOMES LESS DEEP WITH TIME THERE AND ELSEWHERE...SLOWLY CUTTING
EFFICIENCY OF PCPN PRODUCTION AS WELL THIS EVENING...LIKELY MARKING
REDUCTION OF SNOWFALL RATES ACRS ERN AREAS. BECOME A REAL QUANDRY
WHAT TO DO WITH HEADLINES. WORST OF THE SNOWFALL IS CERTAINLY
STARTING TO WIND DOWN GOING THRU THE EVNG...WITH FOCUS FOR LATE
AFTN/EVNG DEFINITELY ACRS NW IA INTO SW MN. EXPECT PERHAPS A COUPLE
INCHES MORE SNOWFALL FOR ERN 1/3 OF CWA...AN INCH OR LESS TOWARD I29
CORRIDOR. CURRENT ADVY AREAS ADEQUATELY COVER AND TIME THE SNOWFALL
THREAT. ATTENTION THEN TURNS TO WHAT HAS FALLEN...AND WHAT MIGHT
MOVE AROUND WITH INCREASE IN GRADIENT THROUGH THE NIGHT AND INTO
EARLY TUE. ONE COULD ARGUE POTENTIAL THREAT DEVELOPING FOR SOME
BLOWING SNOW ISSUE WITH GUSTS NR 25 KTS LATE. COLDER TMPS FLUSHING
IN W OF THE INVERTED TROUGH AS WELL...GIVEN GRADIENT AND TMPS...ALSO
WL BE DEALING WITH A FEW SUB -20F WIND CHILLS FROM JAMES VLY W LATE
TONIGHT. WITH EXPECTED WIND SPEEDS...A BIT MARGINAL TO TRULY GET
LOTS OF LOFTING OF SNOW AND POTENTIAL TO DROP VSBYS IN BLOWING SNOW
TO A HALF MILE OR LESS IN WIDESPREAD AREAS. DID END UP MENTIONING
SOME BLOWING SNOW IN THE WRN THRU SRN AREAS AFTER MIDNIGHT...BUT
DECIDED TO NOT COMPLICATE ADVY PICTURE AND LET THE SNOW INDUCED
HIGHLIGHTS TAPER GRADUALLY DOWN BEFORE POTENTIAL FOR COVERING ANY
BLOWING SNOW OR WIND CHILL THREAT.
/CHAPMAN

TUESDAY SHOULD BE A BIT BREEZY AT TIMES...ESPECIALLY IN THE WEST AND
SOUTH...WITH WINDS ONLY GRADUALLY INCREASING OVER SW MN.
TEMPERATURES WILL ALSO BE ON THE COLD SIDE SO WIND CHILLS WILL
BOTTOM OUT AROUND ABOUT 20 BELOW ZERO AT TIMES THROUGH THE DAY WITH
HIGHS ONLY IN THE SINGLE DIGITS. COULD SEE A TENTH OR TWO OF
ACCUMULATION IN SW MN AS UPPER LEVEL SUPPORT FINALLY SHIFTS EAST OF
THE AREA AND AREAS OF BLOWING AND DRIFTING SNOW WILL ALSO BE LIKELY.

TUESDAY NIGHT INTO WEDNESDAY WILL SEE COLD HIGH PRESSURE NOSE INTO
THE AREA BRINGING COLDER AIR...BUT LESS WIND. EXPECT MOST AREAS TO
FALL BELOW ZERO BY WEDNESDAY MORNING WITH A FEW SPOTS A LITTLE ABOVE
ZERO ACROSS SW MN WHERE CLOUDS COULD LINGER LONGEST. HIGHS ONLY IN
THE SINGLE DIGITS ON WEDNESDAY UNDER A PARTLY CLOUDY SKY.

A WEAK SYSTEM WILL PASS ON WEDNESDAY NIGHT AND NO PLANS TO ADD ANY
POPS FOR THIS FEATURE...BUT WILL BE A SYSTEM TO WATCH WHICH COULD
DROP A QUARTER TO A HALF AN INCH OF SNOW IF MOISTURE CAN IMPROVE A
LITTLE BIT. OTHERWISE...SLIGHTLY MODERATED TEMPERATURES WITH
SOUTHEAST WINDS...HIGHS MAINLY IN THE TEENS.

IN THE LATTER PERIODS(FRI/MON)...MAIN CONCERN STILL WHETHER OR NOT
WE GET ANY ACCUMULATING SNOW THURSDAY NIGHT INTO FRIDAY AND JUST HOW
STRONG WILL THE INCOMING COLD FRONT BE. FOR THE SNOW...AT THIS TIME
NOT LOOKING LIKE TOO MUCH OF A CONCERN SO WILL CONTINUE LOWER POPS
AND EXPECT AMOUNT OF ABOUT AN INCH OR LESS. LATEST RUNS OF THE
MODELS BACKING OFF A SMIDGE ON THE STRENGTH OF THE COLD AIR COMING
IN...BUT STILL PRETTY COLD REGARDLESS. WILL STAY ON THE COLD SIDE OF
GUIDANCE FOR THE MOST PART BUT OFFSET THAT A BIT DUE TO TIMING
ISSUES. HIGHS ON SATURDAY...SUNDAY AND MONDAY SHOULD BE MAINLY IN
THE SINGLE DIGITS AND WITH A LITTLE WIND A WIND CHILL ADVISORY TYPE
SCENARIO A DEFINITE POSSIBILITY. WILL AIM FOR LOWS MAINLY 5 BELOW TO
15 BELOW ZERO DURING THIS TIME. DID WARM HIGHS UP A BIT ON FRIDAY
HOWEVER AS MODELS HINTING THAT THE WARM SECTOR WILL SCRAPE THE FAR
SOUTHERN CWA...SO WILL ADD SOME LOWER 20S IN THAT AREA. /08

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
IA...WINTER WEATHER ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR IAZ001-
     012-020-031.

     WINTER WEATHER ADVISORY UNTIL 6 AM CST TUESDAY FOR IAZ002-003-
     013-014-021-022-032.

MN...WINTER WEATHER ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR MNZ098.

     WINTER WEATHER ADVISORY UNTIL 6 AM CST TUESDAY FOR MNZ081-089-
     090.

NE...WINTER WEATHER ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR NEZ013-
     014.

SD...WINTER WEATHER ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR SDZ061-
     062-066-067-070-071.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
0440 AM CST MON JAN 10 2011

SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-111200-
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-
0440 AM CST MON JAN 10 2011

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

.DAY ONE...TODAY AND TONIGHT

WINTER WEATHER...
SNOW WILL CONTINUE TO DECREASE FROM THE WEST TODAY AND BECOME
LIGHT BY TONIGHT. ADDITIONAL SNOWFALL WILL VARY FROM LESS THAN 2
INCHES IN MOST OF SOUTHEAST SOUTH DAKOTA TO AROUND 4 INCHES FROM
WINDOM MINNESOTA TO STORM LAKE IOWA. A FEW AREAS OF BLOWING SNOW
MAY DEVELOP LATE TONIGHT FROM MITCHELL SOUTH TO THE MISSOURI
RIVER AREA IN SOUTHEAST SOUTH DAKOTA AS WINDS INCREASE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

LINGERING LIGHT SNOW FROM THE EASTERN BORDER OF SOUTH DAKOTA INTO
SOUTHWEST MINNESOTA AND NORTHWEST IOWA TUESDAY IS EXPECTED TO
PRODUCE LITTLE OR NO ADDITIONAL ACCUMULATION. A FEW AREAS OF
BLOWING SNOW ARE POSSIBLE TUESDAY...MAINLY SOUTH OF INTERSTATE
90.

ANOTHER POTENTIAL FOR SNOWFALL WILL COME WITH A COLD FRONT
THURSDAY NIGHT INTO FRIDAY NIGHT. SNOWFALL POTENTIAL DOES NOT
LOOK HEAVY AT THIS TIME...BUT STRONG WINDS...BLOWING SNOW...AND
DANGEROUS WIND CHILLS MAY DEVELOP BEHIND THE FRONT BY 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.

WILLIAMS