An upper level disturbance interacted with a warm, moist and unstable air mass ahead of a stalled out cold front and produced several severe thunderstorms over central Upper Michigan from the evening of the 9th into the morning of the 10th.

Hail in DICKINSON, MICHIGAN
From 09-APR-17 19:30:00 to 09-APR-17 19:34:00 (CST-6)
Location: ANTOINE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

There was a public report of nickel-sized hail near Moon Lake.

Hail in DICKINSON, MICHIGAN
From 09-APR-17 19:30:00 to 09-APR-17 19:34:00 (CST-6)
Location: ANTOINE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

There was a public report of nickel-sized hail near Bass Lake.

Hail in IRON, MICHIGAN
From 09-APR-17 23:10:00 to 09-APR-17 23:16:00 (CST-6)
Location: MAPLETON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

One inch diameter hail was observed along the Bates Amasa Road.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-APR-17 02:25:00 to 10-APR-17 02:29:00 (EST-5)
Location: ISHPEMING
Magnitude: 78.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a natural gas leak caused by damage from a large uprooted tree along East Johnson Street in the city of Ishpeming.

Hail in MARQUETTE, MICHIGAN
From 10-APR-17 01:30:00 to 10-APR-17 01:34:00 (EST-5)
Location: SWANZY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was a public report of estimated golf ball sized hail at Engman Lake in West Branch Township.

Hail in MARQUETTE, MICHIGAN
From 10-APR-17 02:30:00 to 10-APR-17 02:34:00 (EST-5)
Location: GWINN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

There was a public report of one inch diameter hail in Gwinn.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-APR-17 02:00:00 to 10-APR-17 02:02:00 (EST-5)
Location: (MQT)MARQUETTE CO AR
Magnitude: 62.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The National Weather Service in Negaunee Township observed a peak wind gust of 71 mph.  The strong wind toppled several trees in close proximity to the station.

Hail in DICKINSON, MICHIGAN
From 09-APR-17 18:25:00 to 09-APR-17 18:30:00 (CST-6)
Location: ANTOINE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A public report via MPING of one inch diameter hail near Iron Mountain.  The time of the report was estimated from radar.

Hail in MARQUETTE, MICHIGAN
From 10-APR-17 02:28:00 to 10-APR-17 02:32:00 (EST-5)
Location: SWANZY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A public report via MPING of penny-sized hail four miles northwest of Little Lake.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-APR-17 01:50:00 to 10-APR-17 01:59:00 (EST-5)
Location: WINTHROP JCT
Magnitude: 78.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds peeled a metal roof was peeled off a commercial building in downtown Ishpeming.  Numerous commercial signs and billboards were also torn down or damaged.  Time was estimated from radar.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-APR-17 01:43:00 to 10-APR-17 01:50:00 (EST-5)
Location: NORTH LAKE
Magnitude: 78.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Marquette County Dispatch Center reported multiple high-tension transmission lines downed resulting in widespread power outages and the closure of US Highway 41 west of Ishpeming.  Time of the report was estimated from radar.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-APR-17 02:12:00 to 10-APR-17 02:17:00 (EST-5)
Location: ISHPEMING
Magnitude: 83.00 EG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported multiple large trees and power lines down in the city of Ishpeming.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-APR-17 01:26:00 to 10-APR-17 01:31:00 (EST-5)
Location: SOUTH REPUBLIC
Magnitude: 75.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported numerous trees and a few power poles downed around South Republic.  At least one tree fell on the roof of a house.  The strong wind also tipped over a pull behind camper trailer and bent over a street sign.  Hail of unknown size was also reported.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-APR-17 01:48:00 to 10-APR-17 01:53:00 (EST-5)
Location: GREENWOOD
Magnitude: 83.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The regional central dispatch center reported large power poles down near the intersection of Highway US-41 and County Road 496 in West Ishpeming.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-APR-17 02:00:00 to 10-APR-17 02:05:00 (EST-5)
Location: (MQT)MARQUETTE CO AR
Magnitude: 78.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Social Media

There was a public report of a garage moved off its foundation and windows broken in a house in Negaunee Township along Cedar Lane and Airport Circle.

Thunderstorm Wind in IRON, MICHIGAN
From 09-APR-17 23:48:00 to 09-APR-17 23:55:00 (CST-6)
Location: GIBSON LAKE
Magnitude: 70.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Iron County Sheriff reported numerous trees down across the Bates-Amasa Road resulting in its closure.  Numerous trees were downed in the Amasa area as well.  The time of the report was estimated from radar.