One of the biggest winter storms in years pounded much of Wisconsin, including the northeast part of the state.  Snow developed as low pressure rapidly deepened as it moved across Illinois into Lake Michigan.  Strong winds in response to the deepening low created blowing snow and near blizzard conditions very early in the morning on the 9th across parts of northeast Wisconsin.  Winds gusted to over 50 mph in Door County, and to 48 mph at the NWS Green Bay office.  During the height of the storm, lightning and thunder were reported in the Green Bay area and in central Wisconsin.
The extremely wet and heavy snow combined with high winds to cause widespread tree damage and numerous power outages in northern Door County, mainly in the Baileys Harbor area and on Washington Island.  Utility company reports indicated that about 12,000 customers, mostly in Door, Kewaunee and Marinette counties, lost power during the storm.
Widespread snowfalls of 8 to 16 inches were reported across much of northeast, east-central and central Wisconsin.  Some of the highest totals included 16.5 inches in Allouez and Ledgeview (Brown Co.), 16.2 inches on Green Bay's east side (Brown Co.), 15.6 inches in Scandinavia (Waupaca Co.) and 15.5 inches at St. Nazianz (Manitowoc Co.).  Officially, 14.7 inches fell in at the National Weather Service in Green Bay.
The 14.7 inches in Green Bay placed the storm in the top six biggest snowstorms in Green Bay weather history (observations since 1886), and was the biggest December snowstorm ever.

Winter Storm in FOREST, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in FLORENCE, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: Park/Forest Service

Winter Storm in VILAS, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in ONEIDA, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Blizzard in KEWAUNEE, WISCONSIN
From 08-DEC-09 18:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Blizzard in MANITOWOC, WISCONSIN
From 08-DEC-09 18:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: Trained Spotter

Blizzard in CALUMET, WISCONSIN
From 08-DEC-09 18:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: Utility Company

Blizzard in DOOR, WISCONSIN
From 08-DEC-09 18:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in WINNEBAGO, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in SOUTHERN OCONTO, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Blizzard in BROWN, WISCONSIN
From 08-DEC-09 18:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: Official NWS Observations

Winter Storm in NORTHERN OCONTO, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in MARATHON, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in PORTAGE, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in SOUTHERN MARINETTE, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in NORTHERN MARINETTE, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in LINCOLN, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in WAUPACA, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in SHAWANO, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in WOOD, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in OUTAGAMIE, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in WAUSHARA, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: Trained Spotter

Winter Storm in LANGLADE, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: COOP Observer

Winter Storm in MENOMINEE, WISCONSIN
From 08-DEC-09 15:00:00 to 09-DEC-09 15:00:00 (CST-6)
Reported by: Unknown