An upper disturbance moving across the region generated moderate to heavy lake enhanced snow downwind of Lake Superior in a north to northwest wind flow from the 29th into the 31st.

Lake-Effect Snow in NORTHERN HOUGHTON, MICHIGAN
From 29-DEC-17 10:00:00 to 30-DEC-17 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

There were reports of 10 inches of lake effect snow in 12 hours at South Range, Painesdale and Calumet during the day on the 29th.   Additional snow fell overnight into the morning of the 30th with the Painesdale observer measuring 15 inches of snow in 24 hours and Laurium measuring 14 inches in 22 hours.

Winter Weather in KEWEENAW, MICHIGAN
From 30-DEC-17 08:00:00 to 31-DEC-17 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Copper Harbor observer measured 8.6 inches of lake effect snow in 24 hours.

Winter Weather in KEWEENAW, MICHIGAN
From 29-DEC-17 10:00:00 to 29-DEC-17 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

There was a report of four inches of lake effect snow in 11 hours at Mohawk.

Lake-Effect Snow in ALGER, MICHIGAN
From 29-DEC-17 09:00:00 to 30-DEC-17 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer ten miles south of Grand Marais measured 14 inches of lake effect snow in 24 hours.  Five inches of snow fell in six hours at Deerton during the day on the 30th.

Flood in MARQUETTE, MICHIGAN
From 30-DEC-17 21:00:00 to 31-DEC-17 22:00:00 (EST-5)
Location: HARVEY
Flood cause: Ice Jam
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong northwest winds blowing across Lake Superior pushed ice into the mouth of the Chocolay River producing an ice jam.  Water backed up behind the ice jam causing flooding in the basements of eight homes along the Chocolay River near Lake Superior.

Lake-Effect Snow in MARQUETTE, MICHIGAN
From 30-DEC-17 10:00:00 to 30-DEC-17 16:00:00 (EST-5)
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

There were several reports of one to three inch per hour snowfall rates from Big Bay through Negaunee to Gwinn and Marquette to Harvey.  There was an estimated six to seven inches of lake effect snow at K.I Sawyer in around a two-hour period with whiteout conditions.  There was an estimated four inches of snow in two hours in Little Lake with whiteout conditions reported on Highway M-35 between Gwinn and Little Lake.  An estimated six inches of snow fell in five hours eight miles north-northwest of Negaunee. Whiteout conditions also caused accidents and shut down Highway US-41 for a few hours along the rock-cut between Marquette and Harvey.

Winter Weather in DICKINSON, MICHIGAN
From 30-DEC-17 06:00:00 to 30-DEC-17 11:00:00 (CST-6)
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A brief period of snow dropped 1 to 3 inches of snow near the Marquette County line during the morning of December 30th.  Gusty winds produced blowing snow causing visibility restrictions less than a half mile for a time.  A serious car accident attributed to the weather conditions occurred on M-35 in Sagola Township which claimed the lives of two high school students from the Kingsford School District.

Winter Weather in GOGEBIC, MICHIGAN
From 30-DEC-17 05:00:00 to 30-DEC-17 15:00:00 (CST-6)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A period of lake effect snow showers dropped 1 to 3 inches of snow across parts of Gogebic County. Gusty winds resulted in blowing snow and visibility restrictions during the day.  The combination of snow and reduced visibility contributed to a snowmobile accident at the US 2 and Ramsay Crossing intersection that climbed the life of a gentleman from Wisconsin.