A line of severe thunderstorms struck from Muskegon to Newaygo and Isabella counties on the morning of September 3rd. A National Weather Service storm survey found a 40 mile path of intermittent downburst wind damage, with winds estimated to be from 40 to 70 mph.
Several trees were downed at around 8:35 a.m. in the southern part of the town of Newaygo. Scattered tree damage continued to Croton Dam. After a brief break, damage resumed near Morley in southern Mecosta County and continued to Remus in eastern Mecosta County where scattered trees and large limbs were downed. The most concentrated area of damage occurred in western Isabella County just northeast of Millbrook, where peak winds were estimated at 70 mph around 9:55 a.m. A tree fell on a house and roofs were damaged on an outbuilding and a trailer home.
Strong to severe thunderstorms struck Calhoun and Jackson Counties in the early evening. One inch diameter hail fell near Leroy in Calhoun County and several trees were downed along the path of the storms.

Thunderstorm Wind in OTTAWA, MICHIGAN
From 03-SEP-11 07:20:00 to 03-SEP-11 07:20:00 (EST-5)
Location: GRAND HAVEN
Magnitude: 52.00 EG
Reported by: Law Enforcement

Law enforcement in Grand Haven reported that two trees were blown down.

Thunderstorm Wind in MUSKEGON, MICHIGAN
From 03-SEP-11 07:25:00 to 03-SEP-11 07:25:00 (EST-5)
Location: MUSKEGON
Magnitude: 52.00 EG
Reported by: Law Enforcement

Law enforcement from Muskegon reported receiving reports of numerous trees and power lines down across the county.

Thunderstorm Wind in NEWAYGO, MICHIGAN
From 03-SEP-11 07:35:00 to 03-SEP-11 07:35:00 (EST-5)
Location: NEWAYGO
Magnitude: 52.00 EG
Reported by: NWS Storm Survey

An NWS storm survey revealed that several trees were downed in the town of Newaygo and that scattered tree damage continued to Croton Dam.

Thunderstorm Wind in MECOSTA, MICHIGAN
From 03-SEP-11 08:35:00 to 03-SEP-11 08:45:00 (EST-5)
Location: SYLVESTER
Magnitude: 52.00 EG
Reported by: NWS Storm Survey

An NWS storm survey found that scattered trees and large limbs were blown down from Morley to Remus.

Thunderstorm Wind in ISABELLA, MICHIGAN
From 03-SEP-11 08:53:00 to 03-SEP-11 08:55:00 (EST-5)
Location: MT PLEASANT
Magnitude: 61.00 EG
Property damage: 100.00K
Reported by: NWS Storm Survey

An NWS storm survey found that peak winds estimated at 70 mph just northeast of Millbrook caused a tree to fall on a house and that roofs were damaged on an outbuilding and a trailer home.

Hail in ISABELLA, MICHIGAN
From 03-SEP-11 07:37:00 to 03-SEP-11 07:37:00 (EST-5)
Location: WINN
Magnitude: 1.75 
Reported by: County Official

An Isabella county official reported 1.75 inch diameter hail two miles east of Winn.

Thunderstorm Wind in KENT, MICHIGAN
From 03-SEP-11 07:50:00 to 03-SEP-11 07:50:00 (EST-5)
Location: KENT CITY
Magnitude: 52.00 EG
Reported by: Law Enforcement

Kent county law enforcement reported two trees blown down in northern Kent county at 16 mile road and Sargent road.

Hail in CALHOUN, MICHIGAN
From 03-SEP-11 17:05:00 to 03-SEP-11 17:05:00 (EST-5)
Location: JOPPA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An amateur radio operator reported one inch diameter hail near Leroy.

Thunderstorm Wind in JACKSON, MICHIGAN
From 03-SEP-11 17:48:00 to 03-SEP-11 18:00:00 (EST-5)
Location: HORTON
Magnitude: 52.00 EG
Reported by: Public

Several large tree limbs were blown down near Brooklyn and Horton in southern Jackson county.