August 5, 2021


Major Winter Storm Update


Future Radar:  Thursday at 2:00pm CDT

Winter Storm Watches and Warnings are in effect for a good part of the state, starting as soon as tomorrow.  This powerful winter storm is expected to start pushing precipitation into northwest, South Dakota by tomorrow afternoon.  This precipitation is forecast to be rain before changing over to snow by mid to late afternoon.


By Wednesday evening, any rain would have changed over to snow across the northwest and west-central, South Dakota.  The southwest will be battling over rain and snow, with snow winning by Wednesday night.  Rain chances increase across the east.


By Wednesday night, snow will be common across the west and possibly be heavy at times.  During the early morning hours on Thursday, rain will mix or change over to snow across central, South Dakota with rain continuing in the east.

By the midday on Thursday, the change over from rain to snow would have moved east into western parts of northeast, South Dakota and down towards south-central, South Dakota.  Rain chances continue for the southeast and snow for the west.  Heaviest snow is expected to be across the north-central region during this time frame.


By the afternoon and into the evening hours, snow will cover western and central, South Dakota with the eastern side of the state between rain showers and rain/snow mixture.

By Thursday night, any rain would have changed over to snow across the east.  The northwest would start to see an end of precipitation by late Thursday night into Friday morning.  By Friday afternoon, the west would be cleared from snow with chances of snow continuing for north-central, northeast and east-central, South Dakota.

Snowfall amounts look to be the heaviest across north-central, South Dakota where over a foot of snow is expected.  Those along northeast (Sisseton, Watertown and Redfield areas) and back towards western regions of east-central (Huron area) and into south-central, South Dakota (Chamberlain and Winner areas) may want to continue to watch for updated forecast.  These areas will be the battle ground between the rain and snow.  If temperatures cool off quicker and the rain changes over to snow quicker then forecast, snow amounts in this area will be higher.