A vigorous wave moving across a moist and unstable airmass produced thunderstorms with large hail over portions of west and central Upper Michigan on the 10th.

Hail in MARQUETTE, MICHIGAN
From 10-AUG-21 16:47:00 to 10-AUG-21 16:52:00 (EST-5)
Location: GREEN GARDENS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer four miles southeast of Harvey measured hail from half-inch to three-quarter-inch in diameter covering the ground.

Hail in MARQUETTE, MICHIGAN
From 10-AUG-21 16:48:00 to 10-AUG-21 16:53:00 (EST-5)
Location: GREEN GARDENS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A caller reported quarter-sized hail on Green Garden Road about 3 miles southeast of Harvey.  Time of the report estimated from radar.

Hail in ALGER, MICHIGAN
From 10-AUG-21 16:15:00 to 10-AUG-21 16:20:00 (EST-5)
Location: TRENARY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of one-inch diameter hail at Trenary.  The time of the report was estimated by the radar.

Hail in MARQUETTE, MICHIGAN
From 10-AUG-21 16:44:00 to 10-AUG-21 16:49:00 (EST-5)
Location: HARVEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of quarter-sized hail in Harvey with pictures.

Hail in MARQUETTE, MICHIGAN
From 10-AUG-21 16:45:00 to 10-AUG-21 16:46:00 (EST-5)
Location: HARVEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A caller reported dime to penny-sized hail that lasted for a minute along Cherry Creek Road just south of County Road 480.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-AUG-21 14:25:00 to 10-AUG-21 14:45:00 (EST-5)
Location: WITCH LAKE
Magnitude: 56.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Utility Company

UPPCO outage map showed hundreds of customers without power in the area between Witch Lake and the Iron County line.  Delayed report with the time estimated by radar.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-AUG-21 15:00:00 to 10-AUG-21 15:21:00 (EST-5)
Location: AUSTIN
Magnitude: 56.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Utility Company

UPPCO outage map showed more than a thousand customers without power in the area west of Gwinn with most power outages concentrated around Shag Lake.  This is a delayed report with time estimated from radar.

Hail in MARQUETTE, MICHIGAN
From 10-AUG-21 14:40:00 to 10-AUG-21 14:48:00 (EST-5)
Location: WITCH LAKE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Photo and video received via social media of 1.50-inch diameter hail at Witch Lake.  Delayed report with time estimated by the radar.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 10-AUG-21 15:30:00 to 10-AUG-21 15:40:00 (EST-5)
Location: GWINN
Magnitude: 55.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Social Media

A report and photo from the Gwinn area of several trees and broken power down.  The time of the report was estimated from radar.

Hail in GOGEBIC, MICHIGAN
From 10-AUG-21 12:50:00 to 10-AUG-21 13:00:00 (CST-6)
Location: WATERSMEET
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Picture of two-inch diameter hailstone next to ruler sent from near Watersmeet to a local media outlet.  The exact location of the report is unknown and the time is estimated from radar.

Hail in GOGEBIC, MICHIGAN
From 10-AUG-21 12:50:00 to 10-AUG-21 13:00:00 (CST-6)
Location: WATERSMEET
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public submitted a photo of a baseball-sized hailstone near Watersmeet to a local news station immediately after the hail stopped at 300 CDT.

Hail in MARQUETTE, MICHIGAN
From 10-AUG-21 16:41:00 to 10-AUG-21 16:46:00 (EST-5)
Location: HARVEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail size ranged from pea-sized to three-quarter-inch in diameter just southwest of Harvey.