After being hit by heavy snow December 18 and 19, southwest and central Wisconsin were impacted by another winter storm December 20 through 21. Highest snowfall amounts were mainly 4 to 7 inches, with specific reports of 7.5 inches near Galesville (Trempealeau County) and 6.5 inches near La Crosse (La Crosse County) and Warrens (Monroe County).
Northwest winds gusting to 25 to 35 mph in the wake of an arctic cold front produced blowing and drifting snow, especially on ridgetops. In addition to the wind and snow, sharply falling temperatures resulted in bitterly cold wind chills of 20 below to 40 below, which lingered into December 22.
Due to several in a series of snow-producing systems, La Crosse would go on to establish an all-time record monthly snowfall of 32.7 inches for December 2008. The previous record snowfall for December was 30.4 inches in 1990.

Cold/Wind Chill in VERNON, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Cold/Wind Chill in BUFFALO, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An unofficial wind chill of -35F was reported from Alma.

Cold/Wind Chill in MONROE, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values included -33F from the Tomah area and -30F from Sparta.

Cold/Wind Chill in JACKSON, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Black River Falls had an unofficial wind chill of -33F.

Winter Storm in JUNEAU, WISCONSIN
From 20-DEC-08 08:30:00 to 21-DEC-08 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Storm in LA CROSSE, WISCONSIN
From 20-DEC-08 08:30:00 to 21-DEC-08 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Storm in MONROE, WISCONSIN
From 20-DEC-08 08:30:00 to 21-DEC-08 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Storm in CRAWFORD, WISCONSIN
From 20-DEC-08 10:00:00 to 21-DEC-08 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Storm in GRANT, WISCONSIN
From 20-DEC-08 10:00:00 to 21-DEC-08 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Storm in RICHLAND, WISCONSIN
From 20-DEC-08 10:00:00 to 21-DEC-08 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Storm in VERNON, WISCONSIN
From 20-DEC-08 08:30:00 to 21-DEC-08 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Cold/Wind Chill in LA CROSSE, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values include -37F at the La Crosse National Weather Service office and -34F at the La Crosse Municipal Airport.

Cold/Wind Chill in ADAMS, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values included -37 at Friendship.

Cold/Wind Chill in JUNEAU, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values included -37F at Volk Field and -34F at Necedah.

Cold/Wind Chill in GRANT, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values include -39F at Fennimore and -27F at Boscobel.

Cold/Wind Chill in CRAWFORD, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values included -39F at Mount Sterling and -34F at Prairie du Chien.

Cold/Wind Chill in TREMPEALEAU, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values included -38F at Arcadia.

Cold/Wind Chill in RICHLAND, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values included -37F at Richland Center.

Cold/Wind Chill in TAYLOR, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values included -36F at Diamond Lake and -35F at Medford.

Cold/Wind Chill in CLARK, WISCONSIN
From 21-DEC-08 18:00:00 to 22-DEC-08 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lowest wind chill values included -36F at Loyal.