A strong moisture-laden storm system lifting up from the Southern Plains resulted in record precipitation amounts across much of Upper Michigan from the 13th into the 15th with anywhere from one to three inches of storm total precipitation.  As colder air moved in behind the system on the 14th, precipitation changed from heavy rain to moderate to heavy sleet or snow over the west half.

Winter Weather in GOGEBIC, MICHIGAN
From 14-DEC-15 07:00:00 to 15-DEC-15 07:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer in Ironwood measured 4.5 inches of snow in approximately 18 hours.

Winter Weather in ONTONAGON, MICHIGAN
From 14-DEC-15 08:00:00 to 15-DEC-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Observers measured anywhere from one to nearly four inches of snow across the county from the event with the least amount of snow at Ontonagon near Lake Superior and the heaviest snow at Bergland Dam.  The spotter just south of Ontonagon reported one to two inches of sleet with very slippery road conditions.

Winter Weather in NORTHERN HOUGHTON, MICHIGAN
From 14-DEC-15 07:00:00 to 15-DEC-15 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Observers at Kearsarge and near Atlantic Mine measured four inches of snow in approximately 18 hours.  Accumulations of sleet, snow and freezing rain combined to make roads and sidewalks very slippery across much of the county.

Winter Weather in KEWEENAW, MICHIGAN
From 14-DEC-15 08:00:00 to 15-DEC-15 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Observers measured anywhere from two to four inches of snow across the county over approximately 18 hours.  Snow and sleet accumulation combined to make roads and sidewalks very slippery.

Winter Weather in BARAGA, MICHIGAN
From 14-DEC-15 07:00:00 to 14-DEC-15 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer in Herman measured 1.2 inches of sleet in less than 12 hours. The Baraga County Sheriff reported very slippery roadways throughout much of the county from the combination of sleet and snow.

Winter Weather in SOUTHERN HOUGHTON, MICHIGAN
From 14-DEC-15 07:00:00 to 15-DEC-15 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Sleet and snow accumulation approaching one inch at many locations resulted in very slippery roadways and sidewalks.

Winter Weather in IRON, MICHIGAN
From 14-DEC-15 07:00:00 to 15-DEC-15 07:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wintry mix of snow, sleet and freezing rain accumulating one to two inches resulted in very slippery roadways and sidewalks.

Winter Weather in MARQUETTE, MICHIGAN
From 14-DEC-15 18:00:00 to 15-DEC-15 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The National Weather Service in Negaunee Township and spotters in Negaunee and Ishpeming measured nearly four inches of snow in approximately 12 hours.  The observer south of Big Bay measured 5.7 inches for the 24-hour period ending on the morning of the 15th. Roads and sidewalks were reported to be very slippery from the wet snow.

Heavy Rain in ALGER, MICHIGAN
From 13-DEC-15 07:00:00 to 15-DEC-15 07:00:00 (EST-5)
Location: TRENARY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Observers across Alger County measured two-day rainfall totals between two and three inches with the highest totals generally over the western half of the county.

Heavy Rain in MENOMINEE, MICHIGAN
From 13-DEC-15 07:00:00 to 15-DEC-15 07:00:00 (CST-6)
Location: DAGGETT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Two-day rainfall total exceeded two inches at several locations across the county with the heaviest amounts in the Spalding and Daggett areas.

Heavy Rain in DICKINSON, MICHIGAN
From 13-DEC-15 07:00:00 to 15-DEC-15 07:00:00 (CST-6)
Location: NORWAY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Two-day rainfall totals exceeded two inches at several locations across the county with the heaviest amounts reported near Norway.

Heavy Rain in LUCE, MICHIGAN
From 13-DEC-15 07:00:00 to 15-DEC-15 07:00:00 (EST-5)
Location: NEWBERRY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Two-day rainfall totals exceeded two inches across much of Luce County.

Heavy Rain in SCHOOLCRAFT, MICHIGAN
From 13-DEC-15 07:00:00 to 15-DEC-15 07:00:00 (EST-5)
Location: MANISTIQUE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Two-day rainfall totals across the county generally ranged between two and three inches with the highest amounts reported near Manistique in southern Schoolcraft County.

Heavy Rain in DELTA, MICHIGAN
From 13-DEC-15 08:00:00 to 15-DEC-15 08:00:00 (EST-5)
Location: GARDEN CORNERS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Two-day rainfall totals across the county ranged generally between two and three inches with the highest totals reported near the Garden Peninsula.

Heavy Rain in MARQUETTE, MICHIGAN
From 13-DEC-15 08:00:00 to 15-DEC-15 08:00:00 (EST-5)
Location: (MQT)MARQUETTE CO AR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Two-day precipitation totals across much of Marquette County approached or exceeded two inches with nearly all of the precipitation falling as rain.  The National Weather Service in Negaunee Township measured a two-day precipitation total of 2.34 which was the second highest on record for December and for meteorological winter.