A very moist and unstable airmass accompanying a stalled stationary boundary resulted in multiple rounds of thunderstorms beginning during the early morning hours of August 28, 2020 and continuing into the evening hours. During the morning hours, several of these thunderstorms repeatedly trained over the same areas, resulting in 2-4+ inches of rain in just a few hour's time and numerous reports of flooding especially in the greater Detroit metro region. As daytime instability increased during the afternoon hours, widely scattered severe thunderstorms developed producing large hail and isolated damaging winds. The stationary boundary was finally ushered east of the region during the overnight hours of August 28 into 29, 2020 as a vigorous cold front and accompanying line of strong thunderstorms moved across the region bringing an end to the much needed, but in most areas, deluge of rainfall experienced across most of southeast Michigan.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 28-AUG-20 23:50:00 to 28-AUG-20 23:50:00 (EST-5)
Location: PINCKNEY
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were reported down.

Flash Flood in MACOMB, MICHIGAN
From 28-AUG-20 05:20:00 to 28-AUG-20 09:00:00 (EST-5)
Location: MT VERNON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

M-59 closed at Utica due to flooding, as well as Mound and Thirteen mile roads in Warren.

Flash Flood in WAYNE, MICHIGAN
From 28-AUG-20 05:35:00 to 28-AUG-20 09:00:00 (EST-5)
Location: NORTHVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

M-10 and I-94 were closed due to flooding in Detroit, as well as I-96 between Inkster and Beech Daly in Livonia.

Flood in OAKLAND, MICHIGAN
From 28-AUG-20 09:00:00 to 28-AUG-20 12:00:00 (EST-5)
Location: FERNDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flooding from the heavy morning rain slowly receded.

Hail in GENESEE, MICHIGAN
From 28-AUG-20 16:05:00 to 28-AUG-20 16:05:00 (EST-5)
Location: FLUSHING
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GENESEE, MICHIGAN
From 28-AUG-20 16:07:00 to 28-AUG-20 16:07:00 (EST-5)
Location: FLUSHING
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GENESEE, MICHIGAN
From 28-AUG-20 16:08:00 to 28-AUG-20 16:08:00 (EST-5)
Location: FLINT DALTONS ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in GENESEE, MICHIGAN
From 28-AUG-20 16:10:00 to 28-AUG-20 16:10:00 (EST-5)
Location: FLUSHING
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Airplane Pilot

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 28-AUG-20 14:20:00 to 28-AUG-20 14:20:00 (EST-5)
Location: STONY CREEK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 10 inch diameter tree branch was reported down on the road.

Thunderstorm Wind in GENESEE, MICHIGAN
From 28-AUG-20 16:02:00 to 28-AUG-20 16:02:00 (EST-5)
Location: CLIO CAGNEY ARPT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was snapped from the wind.

Thunderstorm Wind in SHIAWASSEE, MICHIGAN
From 28-AUG-20 22:35:00 to 28-AUG-20 22:35:00 (EST-5)
Location: LAINGSBURG ARPT
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were reported down.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 28-AUG-20 23:39:00 to 28-AUG-20 23:39:00 (EST-5)
Location: ANDERSON
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were reported down.

Flash Flood in OAKLAND, MICHIGAN
From 28-AUG-20 05:20:00 to 28-AUG-20 09:00:00 (EST-5)
Location: FERNDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Closed roads from flooding reported in Rochester and Southfield.

Flood in MACOMB, MICHIGAN
From 28-AUG-20 09:00:00 to 28-AUG-20 12:00:00 (EST-5)
Location: MT VERNON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flooding from the heavy morning rain slowly receded.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 28-AUG-20 23:52:00 to 28-AUG-20 23:52:00 (EST-5)
Location: ISLAND LAKE
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees were reported down.

Flood in WAYNE, MICHIGAN
From 28-AUG-20 09:00:00 to 28-AUG-20 12:00:00 (EST-5)
Location: NORTHVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flooding from the heavy morning rain slowly receded.