Our third clipper system since this past weekend will move through the Northland later tonight bringing with it a period of snow which looks to last roughly one to four hours in any given location.
Although the snow will be of short duration, it may come down heavily in some parts of the area overnight tonight with a quick half inch to two inches of snow accumulation possible in parts of the Northland by daybreak, with a slight chance for a few isolated three-inch snow amounts.
A brief period of strong lift (orange and red colors on animation below) will move across the Northland from west to east late tonight, and this combined with rather steep mid-level lapse rates will lead to the possibility for heavier snow showers impacting parts of the area late tonight.
Snow is forecast to spread quickly from west to east across the Northland from mid to late evening and during the overnight with snow ending in most of the area by ~6 AM Wednesday, except in the Arrowhead where some snow may linger thru mid-morning Wednesday.
The potential does exist for a few rain showers or mixed rain/snow showers Wednesday afternoon and evening but any precipitation that falls during that time frame shouldn’t amount to much.
Timing for tonight’s snow in Duluth and Superior: Starting ~11 PM to 1 AM tonight, ending ~4 AM to 5 AM Wednesday.
18z NAM 3km model simulated radar forecast thru 6 PM Wednesday.
Here’s my snowfall accumulation forecast for tonight’s system.
Greatest amounts of 2 to 3 inches across far northern Minnesota into the Arrowhead with amounts tapering to 1 to 2 inches from Grand Rapids to Hibbing to Two Harbors to Bayfield, with trace to 1-inch amounts forecast for much of east-central Minnesota and northwest Wisconsin.
Note: Snowfall totals ranging from a half inch to two inches is possible in Duluth and Superior early Wednesday morning.
December will open on a mild note across the region with daytime highs on Wednesday ranging from the upper 30s to middle 40s in northeast Minnesota and northwest Wisconsin to the 50s and lower 60s in western and southern Minnesota.
Another burst of light snow could affect parts of the Northland sometime late Thursday or Friday, but a system moving east out of the Western High Plains/Northern Plains over the weekend has a chance to produce a more significant snowfall in parts of the upper Midwest which could include parts of northeast Minnesota and northwest Wisconsin. Stay tuned!
With the month of November 2021 wrapping up today here’s a preliminary look at how temperatures were this month, generally warmer than average across the west, and below average over the east.
Here in the Northland, average temps for November 2021 will likely finish about +1 degree warmer than average.
I’ll have a complete climate summary for November 2021 on Wednesday.