Surface low pressure developed rapidly ahead of a strong short wave trough and moved south of Wisconsin from west central Illinois to just south of Chicago.  A shield of precipitation spread over southern Wisconsin the night of March 8th with forcing from warm air advection ahead of the low, and continued through the morning of the 9th as the low crossed northern Illinois. The thermal structure associated with the storm was such that the rain/snow line bisected the Milwaukee/Sullivan County Warning Area. Locations along and northwest of a Fond Du Lac to Madison line saw snowfall accumulations of 3 to 5 inches, with isolated spots seeing more than 5 inches. To the east of this line, 2 to 4 inches of snow was common. The tier of counties right along the Illinois border only received 1 to 2 inches of snow, as most of the precipitation fell as rain.

Winter Weather in WASHINGTON, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: COOP Observer

A mix of rain and snow began around midnight on March 9th and changed over to all snow overnight. Snowfall totaled between 4 and 5 inches across the county. A cooperative observer near Holy Hill recorded 4.8 inches of snow.

Winter Weather in OZAUKEE, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: Law Enforcement

A mix of rain and snow began around midnight on March 9th gradually changed over to all snow overnight. Snowfall totaled between 3 and 4 inches across the county.

Winter Weather in MILWAUKEE, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: COOP Observer

A mix of rain and snow gradually changed over to all snow overnight on March 9th.  Snowfall totaled between 2 and 4 inches across the county. A cooperative observer on the northwest side of MIlwaukee recorded 4.1 inches of snow.

Winter Weather in GREEN LAKE, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: COOP Observer

A mix of rain and snow changed over to all snow after midnight on March 9th. Maximum snowfall totaled between 7 and 8 inches. The cooperative observer in Mareksan recorded 7.4 inches of snow.

Winter Weather in FOND DU LAC, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: Law Enforcement

A mix of rain and snow changed over to all snow after midnight on March 9th. Maximum snowfall totaled around 6 inches in western Fond Du Lac County.

Winter Weather in SHEBOYGAN, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: COOP Observer

A mix of rain and snow changed over to all snow after midnight on March 9th. Snowfall totaled between 4 and 5 inches across the county. A cooperative observer 4 miles southwest of the city of Sheboygan recorded 4.6 inches of snow.

Winter Weather in DODGE, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: COOP Observer

A mix of rain and snow began around midnight on March 9th and changed over to all snow overnight. Snowfall totaled between 6 and 7 inches across the county. A cooperative observer in the town of Westford recorded 6.6 inches of snow.

Winter Weather in MARQUETTE, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: Law Enforcement

A mix of rain and snow changed over to all snow after midnight on March 9th. Snowfall totaled around 6 inches in eastern sections of Marquette County.

Winter Weather in SAUK, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: COOP Observer

A mix of rain and snow changed over to all snow after midnight on March 9th. Snowfall totaled between 4 and 5 inches across the county. A cooperative observer in Reedsburg recorded 4.6 inches of snow.

Winter Weather in COLUMBIA, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: Law Enforcement

A mix of rain and snow began around midnight on March 9th and changed over to all snow overnight. Snowfall totaled between 5 and 6 inches across the county.

Winter Weather in WAUKESHA, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: COOP Observer

A mix of rain and snow gradually changed over to all snow overnight on March 9th.  Snowfall totaled between 2 and 4 inches across the county. The cooperative observer in Oconomowoc recorded 3.7 inches of snow.

Winter Weather in IOWA, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: COOP Observer

A mix of rain and snow gradually changed over to all snow around midnight on March 9th.  Snowfall totaled between 4 and 5 inches across the county. A cooperative observer in Dodgeville recorded 4.5 inches of snow.

Winter Weather in DANE, WISCONSIN
From 09-MAR-11 00:00:00 to 09-MAR-11 14:00:00 (CST-6)
Reported by: Official NWS Observations

A mix of rain and snow gradually changed over to all snow around midnight on March 9th.  Snowfall totaled between 4 and 5 inches across the county. The contract observer at Dane County Regional Airport in Madison reported 5.1 inches of snow.