An upper level disturbance interacted with an unstable airmass in place across Lower Michigan, producing multiple short line segments of strong to severe thunderstorms.  These storms produced both large hail and damaging wind gusts during the afternoon hours.

Hail in ANTRIM, MICHIGAN
From 20-MAY-13 13:55:00 to 20-MAY-13 13:55:00 (EST-5)
Location: BELLAIRE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ANTRIM, MICHIGAN
From 20-MAY-13 13:23:00 to 20-MAY-13 13:23:00 (EST-5)
Location: KEWADIN
Magnitude: 55.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees were downed.

Thunderstorm Wind in ANTRIM, MICHIGAN
From 20-MAY-13 14:00:00 to 20-MAY-13 14:00:00 (EST-5)
Location: MANCELONA
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree and multiple tree limbs were downed.

Thunderstorm Wind in ROSCOMMON, MICHIGAN
From 20-MAY-13 14:10:00 to 20-MAY-13 14:10:00 (EST-5)
Location: HOUGHTON LAKE
Magnitude: 54.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were downed.

Thunderstorm Wind in CHARLEVOIX, MICHIGAN
From 20-MAY-13 14:10:00 to 20-MAY-13 14:10:00 (EST-5)
Location: WALLOON LAKE
Magnitude: 60.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines downed.  Forty trees uprooted at Walloon Lake Country Club.

Thunderstorm Wind in GLADWIN, MICHIGAN
From 20-MAY-13 15:15:00 to 20-MAY-13 15:25:00 (EST-5)
Location: LYLE
Magnitude: 60.00 EG
Property damage: 55.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A swath of wind damage moved across the Beaverton and Sugar Springs area. Dozens of trees were downed, and some minor damage to homes occurred.

Hail in GLADWIN, MICHIGAN
From 20-MAY-13 15:30:00 to 20-MAY-13 15:30:00 (EST-5)
Location: DALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHARLEVOIX, MICHIGAN
From 20-MAY-13 14:16:00 to 20-MAY-13 14:16:00 (EST-5)
Location: EAST JORDAN ARPT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in OGEMAW, MICHIGAN
From 20-MAY-13 15:30:00 to 20-MAY-13 15:30:00 (EST-5)
Location: WEST BRANCH
Magnitude: 52.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Public

A semi-trailer was blown over near I-75.

Thunderstorm Wind in ARENAC, MICHIGAN
From 20-MAY-13 15:53:00 to 20-MAY-13 15:57:00 (EST-5)
Location: STERLING
Magnitude: 55.00 EG
Property damage: 45.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were downed in Sterling, while the roof was blown off of a home in Standish.

Thunderstorm Wind in ARENAC, MICHIGAN
From 20-MAY-13 16:05:00 to 20-MAY-13 16:05:00 (EST-5)
Location: TWINING
Magnitude: 54.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were downed.

Thunderstorm Wind in ALCONA, MICHIGAN
From 20-MAY-13 16:10:00 to 20-MAY-13 16:10:00 (EST-5)
Location: GLENNIE
Magnitude: 55.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees and power lines were downed.

Thunderstorm Wind in IOSCO, MICHIGAN
From 20-MAY-13 16:15:00 to 20-MAY-13 16:15:00 (EST-5)
Location: TAWAS CITY
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Some tree limbs and numerous power lines were downed.

Thunderstorm Wind in IOSCO, MICHIGAN
From 20-MAY-13 16:07:00 to 20-MAY-13 16:07:00 (EST-5)
Location: LONG LAKE
Magnitude: 54.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A number of trees were downed.

Hail in ANTRIM, MICHIGAN
From 20-MAY-13 13:30:00 to 20-MAY-13 13:30:00 (EST-5)
Location: CLAM RIVER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LEELANAU, MICHIGAN
From 20-MAY-13 13:08:00 to 20-MAY-13 13:08:00 (EST-5)
Location: NORTHPORT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Hail in KALKASKA, MICHIGAN
From 20-MAY-13 13:51:00 to 20-MAY-13 13:51:00 (EST-5)
Location: SPENCER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LEELANAU, MICHIGAN
From 20-MAY-13 12:51:00 to 20-MAY-13 12:51:00 (EST-5)
Location: GREILICKVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media