On Tuesday, June 27th, an upper level disturbance led to an environment with moderate instability and moderate windshear. The atmosphere was primarily favorable for mostly a large hail event. However, the atmosphere was also susceptible to strong downbursts as evidenced by a measured wind gust of 56 Knots at the Ann Arbor airport. The strongest storm tracked across Washtenaw county and produced hail up to the size of golf balls. A weak boundary near Lake Erie allowed for the spinup of an F0 Tornado near Estral Beach.

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 14:12:00 to 27-JUN-06 14:12:00 (EST)
Location: ANN ARBOR
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 27-JUN-06 14:14:00 to 27-JUN-06 14:14:00 (EST)
Location: ANN ARBOR
Magnitude: 52 EG
Property damage: 4K
Reported by: LAW ENFORCEMENT

Law Enforcement reported a tree blown down on car.

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 14:12:00 to 27-JUN-06 14:12:00 (EST)
Location: ANN ARBOR
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 27-JUN-06 14:03:00 to 27-JUN-06 14:03:00 (EST)
Location: ANN ARBOR
Magnitude: 54 MG
Reported by: AWOS,ASOS,MESONET,ETC

National Weather Service surface observing equipment measured a wind gust of 65 MPH.

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 14:07:00 to 27-JUN-06 14:07:00 (EST)
Location: ANN ARBOR
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 14:17:00 to 27-JUN-06 14:17:00 (EST)
Location: ANN ARBOR
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in WAYNE, MICHIGAN
From 27-JUN-06 15:30:00 to 27-JUN-06 15:30:00 (EST)
Location: RIVER ROUGE
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

Trained spotter reported numerous 6 inch tree limbs down.

Hail in WAYNE, MICHIGAN
From 27-JUN-06 15:30:00 to 27-JUN-06 15:30:00 (EST)
Location: RIVER ROUGE
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 14:00:00 to 27-JUN-06 14:00:00 (EST)
Location: SALINE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 13:55:00 to 27-JUN-06 13:55:00 (EST)
Location: SALINE
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 13:58:00 to 27-JUN-06 13:58:00 (EST)
Location: SALINE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in MACOMB, MICHIGAN
From 27-JUN-06 09:55:00 to 27-JUN-06 09:55:00 (EST)
Location: MT CLEMENS
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Hail in MACOMB, MICHIGAN
From 27-JUN-06 14:10:00 to 27-JUN-06 14:10:00 (EST)
Location: WARREN
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in WAYNE, MICHIGAN
From 27-JUN-06 15:40:00 to 27-JUN-06 15:40:00 (EST)
Location: DETROIT
Magnitude: 0.75 
Reported by: BROADCAST MEDIA

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 27-JUN-06 13:24:00 to 27-JUN-06 13:24:00 (EST)
Location: MANCHESTER
Magnitude: 51 EG
Reported by: EMERGENCY MANAGER

Emergency Manager reported 2 twelve inch limbs blown down.

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 13:50:00 to 27-JUN-06 13:50:00 (EST)
Location: SALINE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 27-JUN-06 13:50:00 to 27-JUN-06 13:50:00 (EST)
Location: SALINE
Magnitude: 54 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Trained spotter reported 6 inch trees blown down.

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 13:45:00 to 27-JUN-06 13:45:00 (EST)
Location: BRIDGEWATER
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 14:10:00 to 27-JUN-06 14:10:00 (EST)
Location: ANN ARBOR
Magnitude: 0.75 
Reported by: NWS EMPLOYEE(OFF DUTY)

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 27-JUN-06 14:10:00 to 27-JUN-06 14:10:00 (EST)
Location: ANN ARBOR
Magnitude: 54 EG
Property damage: 12K
Reported by: LAW ENFORCEMENT

Law Enforcement reported 6 utility poles blown down.

Hail in WASHTENAW, MICHIGAN
From 27-JUN-06 14:10:00 to 27-JUN-06 14:10:00 (EST)
Location: ANN ARBOR
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT