Severe weather struck portions of Southwest Lower Michigan during the afternoon and evening hours of May 20th.  Damaging winds and large hail accompanied the strongest storms.  As the temperature and humidity levels climbed through the day, this led to a very unstable airmass in Michigan.  The arrival of a wave of low pressure triggered the storms shortly after noon.  As this feature tracked northeastward through Lower Michigan through the afternoon and evening, the storms strengthened and expanded in coverage.

Hail in MECOSTA, MICHIGAN
From 20-MAY-13 13:28:00 to 20-MAY-13 13:28:00 (EST-5)
Location: RODNEY
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 5.00K
Reported by: Broadcast Media

A one and three quarters inch diameter hail report was relayed by WZZM-TV 13 near Rodney.

Thunderstorm Wind in INGHAM, MICHIGAN
From 20-MAY-13 17:20:00 to 20-MAY-13 17:20:00 (EST-5)
Location: WILLIAMSTON
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Ingham county dispatch reported downed trees and power lines near Williamston.

Hail in NEWAYGO, MICHIGAN
From 20-MAY-13 13:45:00 to 20-MAY-13 13:45:00 (EST-5)
Location: OXPOW
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A one and a quarter inch diameter hail report was received from Newaygo county at Hardy Dam from an amateur radio operator.

Hail in CLARE, MICHIGAN
From 20-MAY-13 14:15:00 to 20-MAY-13 14:15:00 (EST-5)
Location: HARRISON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported one inch diameter hail.

Hail in KALAMAZOO, MICHIGAN
From 20-MAY-13 14:35:00 to 20-MAY-13 14:35:00 (EST-5)
Location: LONG LAKE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A three quarters inch hail report was received from Kalamazoo county near Long Lake.

Thunderstorm Wind in GRATIOT, MICHIGAN
From 20-MAY-13 15:20:00 to 20-MAY-13 15:20:00 (EST-5)
Location: ALMA
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large limbs were blown down in Alma by gusts estimated up to 60 mph.

Thunderstorm Wind in IONIA, MICHIGAN
From 20-MAY-13 15:15:00 to 20-MAY-13 15:15:00 (EST-5)
Location: BELDING
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Ionia county dispatch reported they had various trees and limbs downed in Belding and Orleans.

Thunderstorm Wind in GRATIOT, MICHIGAN
From 20-MAY-13 15:50:00 to 20-MAY-13 15:50:00 (EST-5)
Location: ALMA
Magnitude: 63.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported large trees and power lines down near Alma and estimated wind gusts of up to 70 to 75 mph.

Hail in INGHAM, MICHIGAN
From 20-MAY-13 17:20:00 to 20-MAY-13 17:20:00 (EST-5)
Location: MASON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Three quarters inch hail was reported by an amateur radio operator near Mason.

Thunderstorm Wind in MECOSTA, MICHIGAN
From 20-MAY-13 14:36:00 to 20-MAY-13 14:36:00 (EST-5)
Location: STANWOOD
Magnitude: 35.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

Mecosta county dispatch reported a downed tree brought down a couple of power lines near 8 mile road and US-131.

Hail in KENT, MICHIGAN
From 20-MAY-13 14:24:00 to 20-MAY-13 14:24:00 (EST-5)
Location: CASCADE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The broadcast media relayed an estimated one inch diameter hail report just northeast of Cascade.

Thunderstorm Wind in MONTCALM, MICHIGAN
From 20-MAY-13 14:37:00 to 20-MAY-13 14:37:00 (EST-5)
Location: TRUFANT
Magnitude: 43.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power poles were snapped in a field near Trufant.