A strong storm system tracked across the central Plains and through the Upper Mississippi Valley, sweeping a cold front through the region during the late evening hours of Friday (12/15) and early morning hours of Saturday (12/16). Strong wind gusts of 55 to 76 mph were observed behind this cold front for several hours across northeast Wisconsin.  The winds led to pockets of tree damage and numerous power outages, leaving over 50,000 people without power in northeast Wisconsin.

High Wind in NORTHERN MARINETTE, WISCONSIN
From 16-DEC-21 02:00:00 to 16-DEC-21 05:00:00 (CST-6)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

High winds downed trees and power lines in northern Marinette County. Peak winds of 58 mph were measured in Pembine.

High Wind in MARATHON, WISCONSIN
From 16-DEC-21 02:00:00 to 16-DEC-21 05:00:00 (CST-6)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High winds downed trees and power lines in Marathon County. Peak winds of 62 mph were measured at the Wausau airport.

High Wind in WOOD, WISCONSIN
From 16-DEC-21 01:00:00 to 16-DEC-21 04:00:00 (CST-6)
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

High winds downed trees and power lines in Wood County. Peak winds of 74 mph were measured at the Marshfield airport.

High Wind in OUTAGAMIE, WISCONSIN
From 16-DEC-21 01:00:00 to 16-DEC-21 05:00:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High winds downed trees and power lines in Outagamie County. Several power poles were downed by high winds near Mackville.

High Wind in MARATHON, WISCONSIN
From 16-DEC-21 01:00:00 to 16-DEC-21 05:00:00 (CST-6)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High winds downed trees and power lines in Brown County. Peak winds of 60 mph were measured at the Green Bay airport.

High Wind in DOOR, WISCONSIN
From 16-DEC-21 04:00:00 to 16-DEC-21 06:00:00 (CST-6)
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

High winds downed trees and power lines in Door County. Peak winds of 66 mph were measured at Washington Island.

High Wind in WINNEBAGO, WISCONSIN
From 15-DEC-21 23:00:00 to 16-DEC-21 01:00:00 (CST-6)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High winds downed trees and power lines in Winnebago County. Peak winds of 58 mph were measured at the Oshkosh airport.

High Wind in CALUMET, WISCONSIN
From 16-DEC-21 00:00:00 to 16-DEC-21 02:00:00 (CST-6)
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

High winds downed trees and power lines in Calumet County. Peak winds of 71 mph were measured in Forest Junction.

High Wind in VILAS, WISCONSIN
From 16-DEC-21 02:00:00 to 16-DEC-21 04:00:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High winds downed trees and power lines in Vilas County. Disasters were declared in the towns of Lincoln and Phelps.

High Wind in ONEIDA, WISCONSIN
From 16-DEC-21 02:00:00 to 16-DEC-21 04:00:00 (CST-6)
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High winds downed trees and power lines in Oneida County. Peak winds of 76 mph were measured at the Rhinelander airport.

High Wind in LANGLADE, WISCONSIN
From 16-DEC-21 02:00:00 to 16-DEC-21 04:00:00 (CST-6)
Magnitude: 36.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

High winds downed trees and power lines in Langlade County. Peak winds of 53 mph were measured at the Antigo airport with sustained winds over 40 mph for over an hour.