.DAY ONE…THROUGH TONIGHT
RAIN WILL QUICKLY CHANGE TO SNOW TONIGHT WITH BLIZZARD CONDITIONS
DEVELOPING BY THE END OF THE NIGHT IN THE AREA ALONG AND WEST OF
A LINE FROM DE SMET TO WHITE LAKE TO PICKSTOWN…OR IN THE AREA
JUST WEST AND NORTH OF MITCHELL. SNOW ACCUMULATIONS OD UP TO 6
INCHES ARE POSSIBLE BY DAYBREAK SUNDAY FROM WEST OF HURON TO
CHAMBERLAIN TO GREGORY. RAIN WILL BECOME MIXED WITH THEN CHANGE
TO SNOW LATE TONIGHT FROM MITCHELL TO BROOKINGS AND
FLANDREAU…AND IN MOST OF SOUTHWEST MINNESOTA. SNOW
ACCUMULATIONS BY DAYBREAK SHOULD BE 2 INCHES OR LESS.
.DAYS TWO THROUGH SEVEN…SUNDAY THROUGH FRIDAY
BLIZZARD CONDITIONS ARE EXPECTED IN MUCH OF THE AREA LATER SUNDAY
INTO MONDAY. THE GREATEST SNOW ACCUMULATIONS WILL BE FROM THE
JAMES VALLEY TO BROOKINGS AND MARSHALL…WHERE 8 TO 14 INCHES
COULD FALL. WINDS WILL INCREASE SUNDAY INTO SUNDAY NIGHT…WITH
GUSTS TO 50 MPH POSSIBLE. THIS WILL CREATE BLIZZARD CONDITIONS
NORTH OF INTERSTATE 90…AND IN THE AREA SOUTH OF INTERSTATE 90
THAT IS WEST OF THE JAMES RIVER. FURTHER SOUTHEAST…SNOW AND
BLOWING SNOW WILL DEVELOP BY LATE SUNDAY FROM YANKTON NORTHEAST
TO SPIRIT LAKE IOWA. FURTHER SOUTHEAST TO SIOUX CITY AND STORM
LAKE IOWA…SOME LIGHT SNOW AND BLOWING SNOW COULD DEVELOP SUNDAY
NIGHT…BUT VERY STRONG NORTHWEST WINDS WILL DEFINITELY AFFECT
THIS AREA BY SUNDAY NIGHT AND INTO MONDAY.
…WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON CST
…BLIZZARD WARNING REMAINS IN EFFECT FROM NOON TODAY TO NOON CST
* TIMING…SNOW…MIXED WITH SLEET AT TIMES EARLY THIS
MORNING…WILL CONTINUE THROUGH TONIGHT BEFORE DECREASING
MONDAY. SNOW MAY BE HEAVY AT TIMES THROUGH THIS AFTERNOON. NORTH
TO NORTHWEST WINDS WILL BECOME VERY STRONG BY LATE THIS
AFTERNOON…AND THESE VERY STRONG WINDS WILL CONTINUE INTO
* ACCUMULATIONS…SNOW AMOUNTS WILL RANGE FROM AROUND 4 TO 8 INCHES
WITH THE HEAVIEST SNOWFALL NORTH OF INTERSTATE 90.
* WIND AND VISIBILITY…EAST WINDS 10 TO 20 MPH WILL BECOME NORTH
TO NORTHWEST THIS AFTERNOON…WITH SPEEDS INCREASING TO 25 TO 45
MPH BY EARLY THIS EVENING. VISIBILITIES WILL DROP TO LESS THAN A
MILE AT TIMES IN SNOW THIS MORNING…AND TO NEAR ZERO AT TIMES IN
BLIZZARD CONDITIONS LATE THIS AFTERNOON INTO MONDAY.
* WIND CHILL VALUES…DROPPING TO NEAR ZERO BY MONDAY MORNING.
A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS
AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT
CONDITIONS…MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF
YOU MUST…HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET
STRANDED…STAY WITH YOUR VEHICLE.
Today Snow with areas of blowing snow. High near 33. Breezy, with a east northeast wind 10 to 15 mph becoming north 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 100%. Total daytime snow accumulation of around 4 inches.
Tonight Snow with widespread blowing snow before 1am, then snow likely with widespread blowing snow after 1am. Low around 21. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Monday Snow showers likely before 7am, then areas of blowing snow and scattered snow showers between 7am and 1pm, then patchy blowing snow and a slight chance of snow showers after 1pm. Cloudy, with a high near 25. Blustery, with a northwest wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday Night A slight chance of snow showers before 7pm. Mostly cloudy, with a low around 10. West northwest wind 5 to 15 mph. Chance of precipitation is 20%.
Blizzard conditions will affect a large portion of the Northern Plains through Monday morning. Light rain will continue until late afternoon across most of northeast Nebraska, and the southern parts of northwest Iowa. There will be a sloppy transition zone between the rain and the snow, across far southeast South Dakota, the northern part of northwest Iowa, and some of southwest Minnesota. Further north and west, plenty of snow and strong northwest winds of 25 to 45 mph will produce dangerous winter conditions. These conditions will continue across most of the eastern and southern parts of South Dakota and western Minnesota Sunday night and into Monday morning. Far southeast South Dakota and northwest Iowa will not have as much snow, but will still have areas of light snow and blowing snow. Continuing light snow and blowing snow northwest of a line from Wessington Springs South Dakota, to Canton, to Sioux Rapids Iowa Monday morning will be ending by around 12 Noon. Storm total snowfall by the time the snow is done Monday afternoon will range from 1 to 5 inches in most of northwest Iowa, to 10 to 13 inches in parts of east central and northeast South Dakota. If planning travel Sunday or Monday, please stay tuned to the latest forecasts, and be prepared to postpone your trip until conditions improve.