A powerful low pressure system originating over the mid-Mississippi Valley dumped wet heavy snow across much of the east half of Upper Michigan from the 20th into the 21st.  A few locations over western Upper Michigan also saw heavy snow during the event.  Strong wind gusts to 50 mph accompanying the wet snow caused power outages across the area.

Winter Weather in SOUTHERN HOUGHTON, MICHIGAN
From 20-DEC-12 08:00:00 to 21-DEC-12 06:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The spotter near Sidnaw measured 7.5 inches of wet snow along with some blowing snow during the event.

Winter Storm in MARQUETTE, MICHIGAN
From 20-DEC-12 07:00:00 to 21-DEC-12 15:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Storm total snowfall included 20 inches seven miles southwest of Ishpeming, 17 inches at the National Weather Service in Negaunee Township and 15 inches at Arnold. The wet heavy snow combined with north wind gusts to 50 mph at times contributed to sporadic power outages and numerous traffic accidents across the Marquette area.  Area schools were closed on the 20th and 21st due to the storm.

Winter Storm in LUCE, MICHIGAN
From 20-DEC-12 08:00:00 to 21-DEC-12 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

McMillan received a foot of wet snow in just over 24 hours.

Winter Storm in DELTA, MICHIGAN
From 20-DEC-12 06:30:00 to 20-DEC-12 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Delta County sheriff reported 6.5 inches of snow fell in Escanaba in less than 12 hours closing area schools on the 20th.

Winter Storm in MENOMINEE, MICHIGAN
From 20-DEC-12 05:00:00 to 21-DEC-12 18:30:00 (CST-6)
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter 12-hour snowfall totals included 12 inches in Powers and 9 inches near Stephenson.  The wet snow combined with north to northeast winds gusting to 50 mph caused sporadic power outages and closed area schools on the 20th.

Winter Storm in SOUTHERN SCHOOLCRAFT, MICHIGAN
From 20-DEC-12 07:00:00 to 20-DEC-12 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Schoolcraft County Road Commission estimated six to eight inches of wet snow fell in Manistique in less than 12 hours on the 20th.

Winter Storm in NORTHERN SCHOOLCRAFT, MICHIGAN
From 20-DEC-12 09:00:00 to 20-DEC-12 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The spotter in Seney measured six inches of wet snow in nine hours.

Winter Storm in DICKINSON, MICHIGAN
From 20-DEC-12 04:30:00 to 20-DEC-12 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The spotter east of Iron Mountain measured 7.4 inches of wet snow in 11 hours while the observer in Norway measured six inches of snow in 12 hours.  Area schools were closed due to the storm.

Winter Storm in ALGER, MICHIGAN
From 20-DEC-12 07:30:00 to 21-DEC-12 08:00:00 (EST-5)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Observers south and east of Grand Marais measured between 12 and 14 inches storm total snowfall.  The wet snow combined with north wind gusts to 50 mph caused power outages and several minor accidents in the Munising area.  Many area schools were also closed on the 20th and 21st.

Winter Storm in BARAGA, MICHIGAN
From 20-DEC-12 08:00:00 to 21-DEC-12 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer in Herman measured 10 inches of wet snow in 24 hours.

Winter Storm in GOGEBIC, MICHIGAN
From 20-DEC-12 06:00:00 to 21-DEC-12 00:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter in Ironwood measured 11 inches of snow in less than 24 hours while a spotter in Bessemer estimated nearly 10 inches of snow.

Winter Weather in NORTHERN HOUGHTON, MICHIGAN
From 20-DEC-12 09:00:00 to 21-DEC-12 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer near Twin Lakes measured seven inches of snow in less than 24 hours.

Winter Weather in ONTONAGON, MICHIGAN
From 20-DEC-12 07:00:00 to 21-DEC-12 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer near Bergland measured nine inches of snow in 24 hours.

Winter Weather in KEWEENAW, MICHIGAN
From 20-DEC-12 09:30:00 to 20-DEC-12 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Keweenaw County Road Commission estimated up to 5 inches of wet snow over the higher terrain of Keweenaw County and in the Mohawk area.