MARQUETTE, Mich. - A low-pressure system associated with a weather pattern known as an "Omega block" brought the snowiest May day on record for parts of Michigan’s Upper Peninsula on Monday, and the late-season winter storm continues to wallop the region Tuesday, leading to dangerous travel conditions and widespread power outages.
The extreme impacts predicted from the storm via NOAA's Weather Prediction Center’s Winter Storm Severity Index (WSSI) include substantial disruptions to daily life, extremely dangerous to impossible driving conditions and extensive and widespread closures and disruptions to infrastructure.
Marquette, Michigan, recorded its snowiest May day on record Monday, coming close to rivaling the May 9-10, 1990, winter storm that brought two feet of snow to the region.
The NWS said Green Bay, Wisconsin, also set a snowfall record on Monday, when more than 2 inches of snow fell.
Winter weather alerts still in effect
Winter Storm Warnings remain in effect for central and western portions of Michigan’s U.P., until Tuesday afternoon, including Cooper Harbor, Houghton, Hancock, L’Anse, Gwinn, Marquette, Grand Marais and Munising.
The NWS says additional snow totals between 1 and 6 inches can be expected. The lowest snow totals will be seen along Lake Superior and the highest in the higher elevations southeast of L’Anse and west of Marquette.
Flood watches, warnings in effect too
In addition, the National Weather Service issued Flood Watches and Warnings across western sections of Michigan’s Upper Peninsula as heavy rain had preceded the snow.
Flood Watches will remain in effect until Tuesday evening for portions of the central U.P., including Alger, Baraga, Dickinson, Iron and Marquette. In western areas of the U.P., the communities of Gogebic, Keweenaw, Northern Houghton, Ontonagon and Southern Houghton are also included in the Flood Watch.
As of Tuesday afternoon, more than 10,000 outages were reported. Counties with the most outages include Marquette, Baraga and Alger.
The storm system should start to wind down during the day on Tuesday and exit the region by Tuesday night and early Wednesday.