A large storm system began to organize across the southern Rockies the morning of Wednesday, December 19th.  This storm intensified as it moved out into the Plains, and across the Mid-Mississippi River Valley, then northeast across the southern Great Lakes by Thursday night, December 20th. Most of the snowfall was light during the evening, but started to intensify after 11 pm across portions of west-central Wisconsin.  One of the heavier bands of snow develop southeast of Red Wing, east toward Eau Claire, and Augusta around 11 pm. Snowfall rates in this area averaged between 1/2 to 1 inch per hour through 3 am.  Locally 4 to 6 inches of snow fell in this band, with additional heavy snowfall across far southeast Eau Claire County where locally 8 to 12 inches fell by mid morning. Occasional light snow continued through the late morning, before tapering off to flurries in the afternoon.

Winter Storm in CHIPPEWA, WISCONSIN
From 19-DEC-12 23:00:00 to 20-DEC-12 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow developed during the late evening, with the heaviest snowfall between 12 am and 4 am. Total snowfall amounts ranged from 4 to 8 inches, with the heaviest in the far south. Significant blowing snow developed and dropped surface visibilities to less than a mile for a few hours. The snow diminished during the morning, before tapering off to flurries in the afternoon.

Winter Storm in DUNN, WISCONSIN
From 19-DEC-12 23:00:00 to 20-DEC-12 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow developed during the late evening, with the heaviest snowfall between 12 am and 4 am. Total snowfall amounts ranged from 4 to 6 inches, with the heaviest in the far south. Significant blowing snow developed and dropped surface visibilities to less than a mile for a few hours. The snow diminished during the morning, before tapering off to flurries in the afternoon.

Winter Storm in EAU CLAIRE, WISCONSIN
From 19-DEC-12 23:00:00 to 20-DEC-12 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow developed during the late evening, with the heaviest snowfall between 12 am and 4 am. Total snowfall amounts ranged from 6 to 12 inches, with the heaviest in the far southeast corner. Significant blowing snow developed and dropped surface visibilities to less than a mile for a few hours. The snow diminished during the morning, before tapering off to flurries in the afternoon.

Winter Storm in PEPIN, WISCONSIN
From 19-DEC-12 23:00:00 to 20-DEC-12 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow developed during the late evening, with the heaviest snowfall between 12 am and 4 am. Total snowfall amounts ranged from 4 to 6 inches across the county.
Significant blowing snow developed and dropped surface visibilities to less than a mile for a few hours. The snow diminished during the morning, before tapering off to flurries in the afternoon.

Winter Storm in PIERCE, WISCONSIN
From 19-DEC-12 21:00:00 to 20-DEC-12 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light snow developed during the evening, with the heaviest snowfall between 11 pm and 4 am. Total snowfall amounts ranged from 4 to 6 inches in the southeast portion of the county. Significant blowing snow developed and dropped surface visibilities to less than a mile for a few hours. The snow diminished during the morning, before tapering off to flurries in the afternoon.