A storm is brewing over the southwestern U.S. tonight. It is forecast to redevelop in the southern Plains and Lower Mississippi Valley and then swing northeastward. Winter Storm Watches and Warnings are flying just to our south (Image above). It appears that this system will only graze the Upper Peninsula with system snow. The heaviest snow is likely to fall over the southeast half of Wisconsin to about Green Bay and then eastward into the northern Lower Peninsula. The southeastern U.P. should have some snow from this system late Saturday night into Sunday but it should not be heavy.
As the system moves eastward during Sunday, colder air will be drawn in on northerly winds. Lake-effect snow is likely to pick up in the north-wind snow belts of Lake Superior and continue into Sunday night. Areas favored under northerly flow include the far west end around Ironwood up to the Porcupine Mountains and the north-central U.P. around Marquette. Substantial snow accumulations are possible in these areas by Monday morning.
Snow fell last night into the early morning hours in varying amounts. Only around an inch fell at Iron Mountain. Around 3 inches fell in the high country of the Keweenaw at Mohawk and Allouez with around 2 inches at Stonington and Garden Corners in Delta County. The most snow fell in the north-central U.P. with help from Lake Superior. Just less than 4 inches was reported at Harvey near Marquette. Lâ??Anse had 5.5 inches and the NWS site just east of Negaunee reported 6.1 inches overnight with a 24 hour total of 8.1 inches.