Update: 6-10 inches of snow, quarter of an inch of ice forecast for region
4:15 p.m. Update
SIOUX FALLS, S.D. - O'Brien and Dickinson counties in Iowa have also been added to the winter storm watch area.
SIOUX FALLS, S.D. - A winter storm watch has been issued for southwest Minnesota and parts of northwest Iowa, from late Saturday night through Sunday evening.
The watch includes Murray, Cottonwood, Nobles, Jackson, Pipestone, and Rock counties in Minnesota and Lyon and Osceola counties in Iowa.
Low pressure will develop across Nebraska on Saturday night and track east into Iowa on Sunday. A strong warm front will be found just north of this low pressure with precipitation expected over most of the area along and north of this low pressure. A band of mixed precipitation is expected to develop Saturday night, especially along and south of Interstate 90.
Far southeast South Dakota into northwest Iowa may see mainly rain to begin with, and an isolated thunderstorm is also possible on Sunday. Of most concern will be the threat for freezing rain and snow along and north of a Yankton to Jackson line.
At this time, the best chance for accumulating freezing rain will be along a line from Tyndall to Sioux Falls to Windom, with mainly snow expected north of this line.
Precipitation will change to mainly snow Sunday night and decrease in intensity during this time.
Timing: A band of freezing rain and snow will develop late Saturday night and intensify Sunday, before decreasing in intensity Sunday evening.
Accumulations: A band of 6 to 10 inches of snow will be possible along and north of a Slayton to Madison to Mitchell line. A band of around a quarter inch of ice will be possible from around Platte to Sioux Falls toward Luverne and Jackson.
Wind and Visibility: Blowing snow should not be a major problem with this system, however, reduced visibility in heavier snow will be possible, especially Sunday afternoon.
Wind Chill: Wind chill values of zero to 5 below will be likely Sunday night along and west of the James River.
Precautions: A winter storm watch means there is a potential for significant snow, sleet or ice accumulations that may impact travel. People in the area should continue to monitor the latest forecasts.