A cold front moving through a very moist and unstable air mass produced severe thunderstorms over portions of west and central Upper Michigan during the afternoon and evening of the 30th.

Hail in LUCE, MICHIGAN
From 30-JUN-18 12:40:00 to 30-JUN-18 12:45:00 (EST-5)
Location: DEER PARK
Magnitude: 2.50 
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement relayed a report of a windshield smashed by hail while driving from Muskallonge Lake State Park to Pine Stump Junction.  Size of the hail was unknown but estimated from the earlier report at the park.  Time of the report was estimated from radar.

Hail in LUCE, MICHIGAN
From 30-JUN-18 12:35:00 to 30-JUN-18 12:45:00 (EST-5)
Location: DEER PARK
Magnitude: 4.00 
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Park/Forest Service

Rangers at Muskallonge Lake State Park reported tennis ball sized hail with numerous camper roofs destroyed.  All 159 campsites at the park sustained hail damage to campers, cars and other property. Seven park vehicles were significantly damaged, and the roofs of several buildings in the park, including the park headquarters building, will probably need to be replaced.  Time of the report was estimated by radar.

Seiche in BARAGA, MICHIGAN
From 30-JUN-18 18:00:00 to 30-JUN-18 18:30:00 (EST-5)
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Pressure differences caused by a large thunderstorm complex moving through the area induced a seiche in Keweenaw Bay.  A significant rise in water of up to five feet in Keweenaw Bay impacted the Baraga Marina, the campground near Sand Point and many others along the bay.  Debris was washed up on US Highway 41 prompting a brief closure.

Seiche in MARQUETTE, MICHIGAN
From 30-JUN-18 18:00:00 to 30-JUN-18 18:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Pressure differences caused by a large thunderstorm complex moving through the area induced a seiche in Marquette Bay.   Video was received at the office which showed boats  grounded for a time in Marquette Bay as seiche waters receded from the shoreline.

Lightning in MARQUETTE, MICHIGAN
From 30-JUN-18 17:17:00 to 30-JUN-18 17:17:00 (EST-5)
Location: MARQUETTE
Property damage: 2.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Smoke was reported at the U.P. Health System in Marquette due to a lightning strike.

Hail in MARQUETTE, MICHIGAN
From 30-JUN-18 17:49:00 to 30-JUN-18 17:54:00 (EST-5)
Location: WEST ISHPEMING
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Penny-sized hail was reported just west of Ishpeming.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 30-JUN-18 18:05:00 to 30-JUN-18 18:10:00 (EST-5)
Location: TROWBRIDGE PARK
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

The Marquette County Central Dispatch in Negaunee Township reported a tree down blocking a road just northwest of Trowbridge Park.  Time of the report was estimated from radar.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 30-JUN-18 17:15:00 to 30-JUN-18 17:20:00 (EST-5)
Location: (MQT)MARQUETTE CO AR
Magnitude: 50.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

The Marquette County Central Dispatch reported two trees down, one on a power line, five  miles northeast of Negaunee.  Time of the report was based on radar.

Hail in ALGER, MICHIGAN
From 30-JUN-18 19:12:00 to 30-JUN-18 19:17:00 (EST-5)
Location: DEERTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Penny-sized hail was reported in Deerton.

Thunderstorm Wind in GOGEBIC, MICHIGAN
From 30-JUN-18 18:12:00 to 30-JUN-18 18:17:00 (CST-6)
Location: WATERSMEET
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Gogebic/Iron County Central Dispatch reported several trees down in Watersmeet.  Time of the report was estimated from radar.

Thunderstorm Wind in ONTONAGON, MICHIGAN
From 30-JUN-18 18:45:00 to 30-JUN-18 18:50:00 (EST-5)
Location: TROUT CREEK
Magnitude: 55.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Social Media

Aspen trees eight inches in diameter were blown down near the roots at Trout Creek.  Report was relayed via social media.

Flash Flood in MARQUETTE, MICHIGAN
From 30-JUN-18 19:00:00 to 30-JUN-18 21:30:00 (EST-5)
Location: MARQUETTE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Marquette County Central Dispatch reported water over US Highway 41 in south Marquette and five inches of water over Highway M-553 near the Carp River Bridge.

Hail in LUCE, MICHIGAN
From 30-JUN-18 12:35:00 to 30-JUN-18 12:40:00 (EST-5)
Location: DEER PARK
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Three-inch diameter hail was observed on the Lake Superior beach seven miles east of Grand Marais.  Pictures and video were received via social media.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 30-JUN-18 17:12:00 to 30-JUN-18 17:17:00 (EST-5)
Location: (MQT)MARQUETTE CO AR
Magnitude: 55.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The Negaunee Township Fire Department received multiple reports of trees down on power lines in the area of North Road and Kivela Road.  Time of the report was estimated from radar.