It's been 16 days since we've seen significant snowfall in much of southern Minnesota. That streak ends today.
Our next significant snowmaker is plowing into Minnesota overnight and Monday. This "long duration" snow event will bring several inches of fresh snowfall, with the heaviest totals focused on the southern third of Minnesota.
Winter storm warnings are flying for much of southwest & south central Minnesota through Monday. Winter weather advisories bracket the winter storm areas, and include the densely populated Twin Cities Metro area.
Snow will expand Sunday night, and the storm's impacts will increase Monday. It looks like Monday will be a tough travel day around the Upper Midwest, and both rush hours will be impacted by snow in the metro.
Here's the breakdown on the developing storm.
Storm Timeline: Sunday night through Tuesday morning:
Timing: Snow spreading rapidly east from the Dakotas into Minnesota Sunday PM & evening. Snow should spread into the metro between 7pm and 10pm Sunday evening.
Intensity/duration/accumulation: Long duration snow event of 24 to 36 hours possible. Light intensity at onset Sunday evening. Snowfall rates increase Monday, with visibilities under 1 mile at times. This should be a fairly dry snowfall with snow:water ratios around 15:1 or so.
Best estimate of accumulations by Tuesday morning include...
Grand Rapids-Duluth-Rice Lake: 2" to 4"
I-94 Corridor: (Fargo-Alex-St. Cloud-Twin Cities-Eau Claire): 3" to 6" **Note: There is a chance metro accumulations could go higher if the storm track shifts slightly north.
Marshall-Mankato-Red Wing: Potential for some 6" to 12" totals!
Primary impact: Basically travel will be a mess in most of Minnesota Monday, including both AM & PM metro drive times. Increasing winds late Monday into Tuesday will cause blowing and drifting.
Plan accordingly, and prepare for a big wintery comeback as we close out January!