Numerous showers and thunderstorms filtered in across portions of Southeast Michigan through the evening of August 11, 2023. The strongest storms were found within the vicinity of or along a warm front, which produced sporadic reports of hail up to an inch and some isolated damaging wind gusts. Prolonged heavy rainfall also led to flooding within Flint which led to multiple road closures. The most significant damage came from a supercell over Perry, MI, which resulted in the production of an EF-1 tornado with maximum wind gusts up to 95 mph. This tornado was on the ground for 12 minutes and started just west of Perry, before moving into the city. Uprooted and sheared trees, damage to outbuildings, and some siding/shingle damage to residential builds were observed. Downed trees also landed on some residential houses and vehicles, resulting in further damage.

Thunderstorm Wind in SAGINAW, MICHIGAN
From 11-AUG-23 18:10:00 to 11-AUG-23 18:10:00 (EST-5)
Location: CHESANING
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Tree limb fell onto a power line.

Hail in SHIAWASSEE, MICHIGAN
From 11-AUG-23 19:04:00 to 11-AUG-23 19:04:00 (EST-5)
Location: JUDDVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in OAKLAND, MICHIGAN
From 11-AUG-23 20:56:00 to 11-AUG-23 20:56:00 (EST-5)
Location: MILFORD
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A 12-15 inch diameter tree was blown down onto the road.

Flash Flood in GENESEE, MICHIGAN
From 11-AUG-23 19:50:00 to 11-AUG-23 19:50:00 (EST-5)
Location: (FNT)BISHOP ARPT FLI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Radar estimates and observations suggest one to one and half inches of rain fell in Flint area. The rainfall occurred in a short period, which lead to flooding, causing vehicles to be stranded in the southern parts of Flint.

Hail in SAGINAW, MICHIGAN
From 11-AUG-23 18:10:00 to 11-AUG-23 18:10:00 (EST-5)
Location: OAKLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in SHIAWASSEE, MICHIGAN
From 11-AUG-23 18:51:00 to 11-AUG-23 19:03:00 (EST-5)
Location: PERRY
Tornado F-scale: EF1
Property damage: 1.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down three miles west of Perry around Beardslee Rd, just south of W. Britton Rd, and initially traveled through Ruess Rd and Boulder Ln, where downed trees and fallen large tree limbs were observed. The tornado then intensified as it entered into the city of Perry. Damage located around the intersection of Polly St and Lamb St and southeast into the intersection of 2nd St and Washington St consisted of large uprooted trees, sheared large tree limbs, major roofing damage to several outbuildings, and shingle/siding damaging to some residential homes. These locations observed a peak wind around 95 mph with a tornado width around 430 yards. The tornado then weakened while entering the vicinity of Washington and 2nd St
where downed large tree limbs were observed, before lifting just east of this location.