Southern Wisconsin recorded accumulating snow in most areas as a warm front passed through the region under an upper-level disturbance. The combination of the warm front and upper disturbance provided the ingredients for snow on Monday, December 20th, with freezing drizzle moving over the area early Tuesday morning, December 21st. The snow began to fall in southwestern Wisconsin mid-day Monday and began a progression to the east and north through the rest of the day. The snow eventually moved into the counties along Lake Michigan late in the afternoon and lasted into early Tuesday morning. Patchy freezing drizzle mixed in with the light snow early Tuesday, with light accumulations of around a hundredth of an inch being reported in multiple areas.

Winter Weather in JEFFERSON, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals around 2 inches were recorded, with Fort Atkinson measuring 2.4 inches. A 40-year-old woman was killed and 3 others injured when her mini-van slid across a snow-covered county road and crashed into a truck. In addition, county officials reported 14 runoff accidents and 3 property damage accidents in the county due to the hazardous travel conditions.

Winter Weather in WAUKESHA, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals of 1 to 2 inches were recorded, with Muskego measuring 2.0 inches.

Winter Weather in KENOSHA, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals of 1 to 2 inches were recorded, with Paddock Lake measuring 2.4 inches.

Winter Weather in MILWAUKEE, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals around 1 inch were recorded, with Brown Deer measuring 1.4 inches.

Winter Weather in WALWORTH, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals of 2 to 3 inches were recorded, with Delavan measuring 2.8 inches.

Winter Weather in RACINE, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals of 2 to 3 inches were recorded, with Burlington measuring 3.0 inches.

Winter Weather in LAFAYETTE, WISCONSIN
From 20-DEC-10 14:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 3 and 6 inches were recorded, with Benton measuring 5.5 inches.

Winter Weather in GREEN, WISCONSIN
From 20-DEC-10 14:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 3 and 4 inches were recorded, with Brodhead measuring 4.1 inches.

Winter Weather in ROCK, WISCONSIN
From 20-DEC-10 14:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 3 and 4 inches were recorded, with Janesville measuring 3.7 inches. Five students received minor injuries when a school bus skidded off a road after hitting a patch of ice near Clinton.

Winter Weather in SAUK, WISCONSIN
From 20-DEC-10 14:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 2 and 4 inches were recorded, with the Wisconsin Dells measuring 4 inches and Spring Green receiving 3.5 inches.

Winter Weather in IOWA, WISCONSIN
From 20-DEC-10 14:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 3 and 5 inches were recorded, with Arena measuring 5 inches.

Winter Weather in DANE, WISCONSIN
From 20-DEC-10 14:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 3 and 4 inches were recorded, with Mount Horeb measuring 4.4 inches.

Winter Weather in MARQUETTE, WISCONSIN
From 20-DEC-10 14:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces.

Winter Weather in DODGE, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 1 and 3 inches were recorded, with Beaver Dam measuring 2.7 inches.

Winter Weather in COLUMBIA, WISCONSIN
From 20-DEC-10 14:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 2 and 4 inches were recorded, with the Wisconsin Dells measuring 4 inches.

Winter Weather in WASHINGTON, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 1 and 2 inches were recorded, with Holy Hill measuring 1.6 inches.

Winter Weather in OZAUKEE, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 1 and 2 inches were recorded, with Fredonial measuring 1.6 inches.

Winter Weather in GREEN LAKE, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 2 and 3 inches were recorded in the county.

Winter Weather in FOND DU LAC, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 2 and 3 inches were recorded, with Fond Du Lac measuring 2.4 inches.

Winter Weather in SHEBOYGAN, WISCONSIN
From 20-DEC-10 17:00:00 to 21-DEC-10 09:00:00 (CST-6)
Reported by: COOP Observer

Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals between 1 and 2 inches were recorded, with Sheboygan measuring 0.7 of an inch.