Winter Weather Advisories are in effect for the northeast corner of South Dakota and southwestern Minnesota for tomorrow. Winter Storm Warnings are in effect for western and central Minnesota.
Thick clouds will move in this evening and tonight ahead of the next storm system. As moisture increases tonight and Friday, snow will start to fall in north central South Dakota and spread southeast during the day Friday. South central and southeast South Dakota will have a chance at freezing drizzle and light freezing rain in the morning before it changes to light snow in the afternoon.
The snow amounts will be heaviest in northeast South Dakota to western Minnesota. Three to six inches will be possible from Sisseton and Watertown southeast to Marshall. As you go west of that area, there will be a sharp cut-off for snow amounts. Aberdeen to Brookings will be in the one to three inch range, while Sioux Falls to Huron will only get a trace to an inch. Central and western South Dakota might miss this one entirely.
Once the system leaves, much colder air will filter in with temperatures only in the teens and twenties for highs on Saturday and Sunday. Overnight lows will even fall below zero during this time, but there’s a slow warm-up in the works as we go through next week.