A combination of squall line thunderstorms tied to a strong cold front and pre-frontal supercells brought severe weather to parts of Southeast Michigan Thursday afternoon and early evening on July 20,2023. One supercell that developed just before the arrival of the squall line produced 2.75 inch (Baseball size) hail over Davison, MI leading to widespread hail damage to vehicles, homes, and businesses.  Several other locations also received severe hail, including Ypsilanti where 2 inch (Lime size) hail fell and Ann Arbor which experienced 1.5 inch (Ping Pong size) hail, shutting down the Ann Arbor Art Fair for a couple hours. Additionally, there were numerous reports of downed trees (some of which fell on homes), several measured wind gusts in excess of 50 mph, and a waterspout over Anchor Bay. DTE reported 90,000 residents without power due to downed power lines.  The outages were mainly along and south of I-69 to the I-94 corridor.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 20-JUL-23 14:40:00 to 20-JUL-23 14:40:00 (EST-5)
Location: WESTACRES
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A large tree was uprooted and blocking the road.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 20-JUL-23 14:36:00 to 20-JUL-23 14:36:00 (EST-5)
Location: ROCHESTER HILLS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two large trees and tree limbs reported down.

Thunderstorm Wind in SHIAWASSEE, MICHIGAN
From 20-JUL-23 13:47:00 to 20-JUL-23 13:47:00 (EST-5)
Location: BYRON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree fell onto a house in Byron.

Hail in MACOMB, MICHIGAN
From 20-JUL-23 14:40:00 to 20-JUL-23 14:40:00 (EST-5)
Location: ROSEVILLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GENESEE, MICHIGAN
From 20-JUL-23 13:33:00 to 20-JUL-23 13:33:00 (EST-5)
Location: MT MORRIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GENESEE, MICHIGAN
From 20-JUL-23 13:39:00 to 20-JUL-23 13:39:00 (EST-5)
Location: BELSAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GENESEE, MICHIGAN
From 20-JUL-23 13:47:00 to 20-JUL-23 13:47:00 (EST-5)
Location: DAVISON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GENESEE, MICHIGAN
From 20-JUL-23 13:50:00 to 20-JUL-23 13:50:00 (EST-5)
Location: DAVISON
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Reports of baseball size hail in Davison.

Hail in LAPEER, MICHIGAN
From 20-JUL-23 13:57:00 to 20-JUL-23 13:57:00 (EST-5)
Location: ELBA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GENESEE, MICHIGAN
From 20-JUL-23 14:00:00 to 20-JUL-23 14:00:00 (EST-5)
Location: DAVISON
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GENESEE, MICHIGAN
From 20-JUL-23 13:23:00 to 20-JUL-23 13:23:00 (EST-5)
Location: OTTERBURN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ST. CLAIR, MICHIGAN
From 20-JUL-23 14:56:00 to 20-JUL-23 14:56:00 (EST-5)
Location: GARDENDALE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees reported blown down.

Thunderstorm Wind in ST. CLAIR, MICHIGAN
From 20-JUL-23 14:55:00 to 20-JUL-23 14:55:00 (EST-5)
Location: WADNAMS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees and power lines reported down around the Wadhams area.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 20-JUL-23 14:45:00 to 20-JUL-23 14:45:00 (EST-5)
Location: CHELSEA
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree reported down on the road.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 20-JUL-23 13:56:00 to 20-JUL-23 13:56:00 (EST-5)
Location: COHOCTAH
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees reported blown across northern Livingston County.

Thunderstorm Wind in ST. CLAIR, MICHIGAN
From 20-JUL-23 14:53:00 to 20-JUL-23 14:53:00 (EST-5)
Location: RUBY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees blown down.

Thunderstorm Wind in WAYNE, MICHIGAN
From 20-JUL-23 15:14:00 to 20-JUL-23 15:14:00 (EST-5)
Location: ROMULUS
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Measured gusts at Detroit Metro Airport.

Hail in WAYNE, MICHIGAN
From 20-JUL-23 14:10:00 to 20-JUL-23 14:10:00 (EST-5)
Location: REDFORD HGTS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHTENAW, MICHIGAN
From 20-JUL-23 15:13:00 to 20-JUL-23 15:13:00 (EST-5)
Location: ANN ARBOR
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MACOMB, MICHIGAN
From 20-JUL-23 15:05:00 to 20-JUL-23 15:05:00 (EST-5)
Location: MT CLEMENS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OAKLAND, MICHIGAN
From 20-JUL-23 14:20:00 to 20-JUL-23 14:20:00 (EST-5)
Location: OXFORD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in OAKLAND, MICHIGAN
From 20-JUL-23 14:32:00 to 20-JUL-23 14:32:00 (EST-5)
Location: GINGLEVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CLAIR, MICHIGAN
From 20-JUL-23 14:42:00 to 20-JUL-23 14:42:00 (EST-5)
Location: ST CLAIR
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WAYNE, MICHIGAN
From 20-JUL-23 15:15:00 to 20-JUL-23 15:15:00 (EST-5)
Location: ALLEN PARK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in SHIAWASSEE, MICHIGAN
From 20-JUL-23 13:20:00 to 20-JUL-23 13:20:00 (EST-5)
Location: OWOSSO
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large trees trees and power lines reported down.

Thunderstorm Wind in ST. CLAIR, MICHIGAN
From 20-JUL-23 14:57:00 to 20-JUL-23 14:57:00 (EST-5)
Location: MARINE CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple trees blown down.

Thunderstorm Wind in ST. CLAIR, MICHIGAN
From 20-JUL-23 14:55:00 to 20-JUL-23 14:55:00 (EST-5)
Location: PORT HURON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A house suffered roof damage.

Hail in GENESEE, MICHIGAN
From 20-JUL-23 13:37:00 to 20-JUL-23 13:37:00 (EST-5)
Location: DAVISON
Magnitude: 2.50 
Property damage: 20.00M
Crop damage: 0.00K
Reported by: Public

Reports of widespread hail damage across Davison, which included car and house damage.

Hail in WAYNE, MICHIGAN
From 20-JUL-23 14:48:00 to 20-JUL-23 14:48:00 (EST-5)
Location: NORTHVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHTENAW, MICHIGAN
From 20-JUL-23 15:07:00 to 20-JUL-23 15:07:00 (EST-5)
Location: ANN ARBOR YOUNG ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 20-JUL-23 15:04:00 to 20-JUL-23 15:04:00 (EST-5)
Location: YPSILANTI
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in WAYNE, MICHIGAN
From 20-JUL-23 15:17:00 to 20-JUL-23 15:17:00 (EST-5)
Location: ECORSE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was reported blown on the road.