October 22, 2021


Storm Update: March 13th PM

SOUTH DAKOTA - Changes from this morning's update has counties in the Southwest and southern Black Hills under a Blizzard Warning.  Winter Storm Warnings have expanded to include Mission, Kadoka and White River areas and Philip and Union Center are now under Winter Weather Advisories.

Winter Storm Watches remain in effect for two counties in east-central, South Dakota which go into effect tomorrow night.

Not seen in the map below, a wind advisory has also been posted from south-central and southeast, South Dakota, mainly south of Interstate 90.


Snowfall amounts from this system will be significant across the southwest region of the state, where over a foot of snow is possible (those areas in the purple and pink regions in the map below).

Belle Fourche:  1 - 3"
Custer:  20 - 26"
Faith:  0 - 3"
Hot Springs:  18 - 24"
Kadoka:  8 - 12"
Lead:  12 - 18"
Martin:  12 - 18"
Mission:  12 - 18"
Murdo:  3 - 6"
Pierre:  1 - 3"
Pine Ridge:  12 - 18"
Rapid City:  12 - 18"
Wall:  8 - 12"
Winner:  3 - 6"


Out towards the east, a growing concerned about significant accumulating snows is growing.  At this time, places like Brookings, Clear Lake, Estelline, Flandreau and Madison could see 4 to 6 inches of snow with higher amounts possible near Elkton and White.  Lesser amounts are expected towards the southeast where two inches of less are in the forecast.  The northeast could see accumulations with areas like Milbank and Watertown may see two to four inches with lesser amounts up towards Sisseton and Aberdeen.

Rain will push into the southwest tonight.  This rain will mix and then turn over to snow, heavy at times by Sunday morning.  Rain is expected to come into southeast, South Dakota as well.

By mid-day tomorrow, heavy snow is expected in the west with rain across south-central and southeast, South Dakota.

Sunday evening will bring widespread snow across the west with a mixture of rain and snow across central regions of the state.  The southeast will continue to see chance of rain.

Sunday night, most of the rain would have changed over to snow.  The snow will start to end across the west as it spreads over eastern, South Dakota.

By mid-day on Monday, the bulk of the snow is expected to exit South Dakota and continue its impacts in Minnesota.

Besides the heavy and significant snow accumulations, strong winds are also expected with this system.  Wind gust from 45 to 60mph will be commons across the southwest.  This will create blizzard conditions which will make travel impossible and extremely dangerous.  Below are the forecast wind speeds.

Please keep checking back with DakotaRadar for storm reports and updates on the storm. S tay safe out there!