An area of upper-level low pressure tracked across the Upper Midwest and western Great lakes region, interacting with increasing moisture moving into Wisconsin ahead of the low. Snow began falling late on the afternoon on the 9th, with most of the area seeing steady snow during the evening rush hour, causing travel problems.
Every event with a place to put it; 17 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MKX wrote it up.
An area of upper-level low pressure tracked across the Upper Midwest and western Great lakes region, interacting with increasing moisture moving into Wisconsin ahead of the low. Snow began falling late on the afternoon on the 9th, with most of the area seeing steady snow during the evening rush hour, causing travel problems. Overall snow totals ranged between 2 and 4 inches, with the snow ending around midnight. The highest snowfall totals were north of a Portage to Port Washington line.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Milwaukee, WI wrote its last area forecast discussion before the first event at Dec 9, 2:04 PM CST, 56 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
17 winter weather. Local standard time, as filed.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Around 2 inches of snow fell across the county, with 1.9 inches measured at Montello.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Around 2 inches of snow fell across the county, with 2 inches measured at Berlin.
Snow began falling late in the afternoon and lasted through the evening. Though snow totals were around 1 inch, the snow fell during the evening rush hour, causing travel problems. The highest snow total was 1 inch in Fond Du Lac.
Snow began falling late in the afternoon and lasted through the evening. Snow totals ranged between 2 and 3 inches, with the highest total of 3 inches in Random Lake.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 1 and 2 inches, with the highest total of 2.2 inches in Baraboo.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 2 and 3 inches, with the highest total of 3 inches in Arlington.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 3 and 4 inches, with the highest total of 3.7 inches in Watertown.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 2 and 3 inches, with the highest totals of 3 inches at West Bend and Holy Hill.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 2 and 3 inches, with the highest total of 3.3 inches at Deforest.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 2 and 4 inches, with the highest total of 3.7 inches near Watertown.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 2 and 3 inches, with the highest total of 2.5 inches at Waukesha.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 2 and 3 inches, with the highest total of 2.8 inches at Brown Deer. There were eight vehicle accidents on area freeways causing minor damage, and one accident involving a minor injury.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 1 and 2 inches, with the highest total of 1.8 inches at Janesville.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 1 and 2 inches, with the highest total of 1.1 inches at Elkhorn.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 1 and 2 inches, with the highest total of 1.8 inches at Wind Lake.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals were around 1 inch, with the highest total of 1.1 inches at Kenosha.
Snow began falling late in the afternoon and lasted through the evening, causing travel problems during the evening rush hour. Snow totals ranged between 2 and 3 inches, with the highest total of 2.7 inches at Cedarburg.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2010Every state in 2010This day in weather historyWarnings in Wisconsin, December 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 275483, 275484, 275485, 275486, 275487, 275488, 275489, 275490, 275491, 275492, 275493, 275494, 275495, 275496, 275497, 275498, 275499.