A potent storm system moved out of the Rockies and across the nation's mid-section into Iowa and Illinois on February 20-21.  Abundant moisture ahead of this storm led to the development of snow across central and east-central Wisconsin during the day February 20th.  Thunder and lightning was reported with the heavy snow in several locations during the afternoon and evening at the height of the storm.
Very dry Canadian air, which moved into far northeast Wisconsin from the north, prevented much, if any snow, to fall there.  This resulted in a large gradient of snowfall across the region.  Twenty-four hour snowfall totals generally ranged from 8 to 12 inches along and near Highway 29 from Wausau to Green Bay.
An upper level low pressure system, which lagged behind the surface storm center, produced another 2 to 4 inches of snow on February 21, bringing two-day storm totals to 13.9 inches at Green Bay (Brown Co.) and 13.0 inches at Appleton (Outagamie Co.).   All time two-day February snowfalls were broken at Wausau (Marathon Co.) with 13.5 inches and Stevens Point (Portage Co.) with 15.8 inches.

Winter Storm in DOOR, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Winter Storm in MARATHON, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Winter Storm in SHAWANO, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Winter Storm in MENOMINEE, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Winter Storm in KEWAUNEE, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Storm in OUTAGAMIE, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Winter Storm in BROWN, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Winter Storm in CALUMET, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Winter Storm in MANITOWOC, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Winter Storm in WOOD, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Winter Storm in PORTAGE, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Winter Storm in WAUPACA, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Winter Storm in WAUSHARA, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Winter Storm in WINNEBAGO, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Winter Storm in SOUTHERN OCONTO, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Winter Storm in LINCOLN, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Storm in LANGLADE, WISCONSIN
From 20-FEB-11 12:00:00 to 21-FEB-11 04:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown