An amplified, upper level weather pattern allowed for an unseasonably warm and humid air mass to infiltrate the southern Great Lakes region.  Highly anomalous for the month of March, surface dew points climbed into the lower 60 degree range across much of Southeastern Michigan. This rich moisture combined with an upper level disturbance tracking northward through Lower Michigan to fuel a long duration severe thunderstorm event across Southeastern Michigan. The primary severe weather type observed with these storms was very large hail, along with 3 tornadoes.

Tornado in MONROE, MICHIGAN
From 15-MAR-12 17:50:00 to 15-MAR-12 17:52:00 (EST-5)
Location: YARGERVILLE
Tornado F-scale: EF0
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tornado was confirmed in central Monroe county.  The tornado was rated an EF0, with maximum wind speeds of 85 mph.   The estimated path length of the tornado is 0.5 miles with a maximum width of 50 yards.  Damage occurred along Ida Center Road just east of Lewis Rd.  The damage consisted of siding and shingles blown off a house, a tipped car, a shed destroyed and trees blown down.

Hail in MACOMB, MICHIGAN
From 15-MAR-12 09:59:00 to 15-MAR-12 09:59:00 (EST-5)
Location: CENTER LINE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HURON, MICHIGAN
From 15-MAR-12 14:28:00 to 15-MAR-12 14:28:00 (EST-5)
Location: CASEVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in HURON, MICHIGAN
From 15-MAR-12 15:12:00 to 15-MAR-12 15:12:00 (EST-5)
Location: POPPLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TUSCOLA, MICHIGAN
From 15-MAR-12 17:12:00 to 15-MAR-12 17:12:00 (EST-5)
Location: MILLINGTON ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 17:20:00 to 15-MAR-12 17:20:00 (EST-5)
Location: ANN ARBOR
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 17:20:00 to 15-MAR-12 17:20:00 (EST-5)
Location: ANN ARBOR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 17:20:00 to 15-MAR-12 17:20:00 (EST-5)
Location: ANN ARBOR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in MONROE, MICHIGAN
From 15-MAR-12 17:25:00 to 15-MAR-12 17:25:00 (EST-5)
Location: LULU
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GENESEE, MICHIGAN
From 15-MAR-12 17:28:00 to 15-MAR-12 17:28:00 (EST-5)
Location: OTISVILLE ARPT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in LENAWEE, MICHIGAN
From 15-MAR-12 17:53:00 to 15-MAR-12 17:53:00 (EST-5)
Location: BRITTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAPEER, MICHIGAN
From 15-MAR-12 17:57:00 to 15-MAR-12 17:57:00 (EST-5)
Location: MILLVILLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONROE, MICHIGAN
From 15-MAR-12 17:57:00 to 15-MAR-12 17:57:00 (EST-5)
Location: LA SALLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONROE, MICHIGAN
From 15-MAR-12 18:09:00 to 15-MAR-12 18:09:00 (EST-5)
Location: DUNDEE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAPEER, MICHIGAN
From 15-MAR-12 18:35:00 to 15-MAR-12 18:35:00 (EST-5)
Location: ELBA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAPEER, MICHIGAN
From 15-MAR-12 18:48:00 to 15-MAR-12 18:48:00 (EST-5)
Location: LAPEER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAPEER, MICHIGAN
From 15-MAR-12 18:50:00 to 15-MAR-12 18:50:00 (EST-5)
Location: IMLAY CITY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BAY, MICHIGAN
From 15-MAR-12 20:00:00 to 15-MAR-12 20:00:00 (EST-5)
Location: TOBICO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TUSCOLA, MICHIGAN
From 15-MAR-12 19:30:00 to 15-MAR-12 19:30:00 (EST-5)
Location: WAHJAMEGA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LENAWEE, MICHIGAN
From 15-MAR-12 20:17:00 to 15-MAR-12 20:17:00 (EST-5)
Location: RIGA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONROE, MICHIGAN
From 15-MAR-12 19:19:00 to 15-MAR-12 19:19:00 (EST-5)
Location: TEMPERANCE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BAY, MICHIGAN
From 15-MAR-12 15:45:00 to 15-MAR-12 15:45:00 (EST-5)
Location: BANGOR TOWNSHIP
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 15-MAR-12 16:20:00 to 15-MAR-12 16:20:00 (EST-5)
Location: HUDSON MILLS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A few trees were blown down.

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 16:53:00 to 15-MAR-12 16:53:00 (EST-5)
Location: DEXTER
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MONROE, MICHIGAN
From 15-MAR-12 17:39:00 to 15-MAR-12 17:39:00 (EST-5)
Location: LULU
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TUSCOLA, MICHIGAN
From 15-MAR-12 17:45:00 to 15-MAR-12 17:45:00 (EST-5)
Location: NORTH LAKE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in OAKLAND, MICHIGAN
From 15-MAR-12 17:46:00 to 15-MAR-12 17:46:00 (EST-5)
Location: NEWARK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 17:32:00 to 15-MAR-12 17:32:00 (EST-5)
Location: ANN ARBOR ARPT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TUSCOLA, MICHIGAN
From 15-MAR-12 17:55:00 to 15-MAR-12 17:55:00 (EST-5)
Location: CARO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONROE, MICHIGAN
From 15-MAR-12 18:00:00 to 15-MAR-12 18:00:00 (EST-5)
Location: PATTERSON GARDENS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in LAPEER, MICHIGAN
From 15-MAR-12 18:35:00 to 15-MAR-12 18:35:00 (EST-5)
Location: ELBA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a 70 mph thunderstorm wind gust.

Flash Flood in WASHTENAW, MICHIGAN
From 15-MAR-12 17:30:00 to 15-MAR-12 20:30:00 (EST-5)
Location: ANN ARBOR YOUNG ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Three to four feet of water was reported to be covering several roads.

Hail in LIVINGSTON, MICHIGAN
From 15-MAR-12 15:28:00 to 15-MAR-12 15:28:00 (EST-5)
Location: HOWELL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BAY, MICHIGAN
From 15-MAR-12 15:30:00 to 15-MAR-12 15:30:00 (EST-5)
Location: BANGOR TOWNSHIP
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in LIVINGSTON, MICHIGAN
From 15-MAR-12 16:07:00 to 15-MAR-12 16:07:00 (EST-5)
Location: PINCKNEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 16:19:00 to 15-MAR-12 16:19:00 (EST-5)
Location: LIMA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 16:30:00 to 15-MAR-12 16:30:00 (EST-5)
Location: WHITMORE LAKE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 16:40:00 to 15-MAR-12 16:40:00 (EST-5)
Location: DEXTER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 16:42:00 to 15-MAR-12 16:42:00 (EST-5)
Location: ANN ARBOR YOUNG ARPT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 16:42:00 to 15-MAR-12 16:42:00 (EST-5)
Location: CHELSEA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 16:55:00 to 15-MAR-12 16:55:00 (EST-5)
Location: CHELSEA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAPEER, MICHIGAN
From 15-MAR-12 17:03:00 to 15-MAR-12 17:03:00 (EST-5)
Location: OTTER LAKE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in MONROE, MICHIGAN
From 15-MAR-12 20:06:00 to 15-MAR-12 20:06:00 (EST-5)
Location: WHITEFORD CENTER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in SANILAC, MICHIGAN
From 15-MAR-12 18:07:00 to 15-MAR-12 18:07:00 (EST-5)
Location: TYRE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MONROE, MICHIGAN
From 15-MAR-12 19:19:00 to 15-MAR-12 19:19:00 (EST-5)
Location: TEMPERANCE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MACOMB, MICHIGAN
From 15-MAR-12 10:00:00 to 15-MAR-12 10:00:00 (EST-5)
Location: CENTER LINE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in BAY, MICHIGAN
From 15-MAR-12 15:50:00 to 15-MAR-12 15:50:00 (EST-5)
Location: BANGOR TOWNSHIP
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 16:55:00 to 15-MAR-12 16:55:00 (EST-5)
Location: DEXTER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 17:10:00 to 15-MAR-12 17:10:00 (EST-5)
Location: ANN ARBOR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 17:25:00 to 15-MAR-12 17:25:00 (EST-5)
Location: GEDDES
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 15-MAR-12 17:30:00 to 15-MAR-12 17:30:00 (EST-5)
Location: ANN ARBOR ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in WASHTENAW, MICHIGAN
From 15-MAR-12 16:18:00 to 15-MAR-12 16:56:00 (EST-5)
Location: HUDSON MILLS
Tornado F-scale: EF3
Property damage: 12.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service Storm Survey confirmed an EF-3 tornado touched down near Dexter, MI with maximum wind speeds of 135-140 mph. The path length was 7.6 miles with a maximum width of 800 yards. The tornado touched down at 5:18 pm just northeast of the intersection of N Territorial and Dexter Townhall Rd. The tornado moved southeast and produced EF-1 damage with winds estimated at 100 mph. Damage was limited to uprooted and snapped trees as well as minor roof damage. The tornado strengthened as it hit the Horseshoe Bend Subdivision with winds estimated at 120 mph and structural damage to the outside of homes. The tornado then continued to track southeast alongside Dexter-Pinckney Rd. and produced EF-3 damage at 5:31pm. Winds estimated at 135-140 mph destroyed one home northwest of Dexter. The tornado then made a left turn and paralleled Huron River Dr. producing EF-2 damage on the north side of Dexter. The tornado then produced EF-3 damage again at 5:49pm in the Huron Farms Subdivision with winds estimated at 135-140 mph. One home was destroyed and another house had only interior rooms left standing. The tornado then weakened as it moved southeast and lifted at 5:56 pm near the intersection of Zeeb Rd. and Ann Arbor-Dexter Rd. In total, 20 homes were severely damaged, with some damage to at least 200 homes.

Tornado in LAPEER, MICHIGAN
From 15-MAR-12 17:49:00 to 15-MAR-12 18:04:00 (EST-5)
Location: COLUMBIAVILLE
Tornado F-scale: EF2
Property damage: 0.50M
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service Storm Damage Survey confirmed the occurrence of a tornado in western Lapeer County, approximately 3 miles south of Columbiaville or 5 miles northwest of Lapeer.  The tornado produced damage consistent with a rating of EF2, with maximum wind speeds of around 125 mph. The tornado damage path was roughly 4.6 miles long with a maximum width of 400 yards.  The damage extended from near the intersection of Mt. Morris Road and German Road with a touchdown of approximately 649 PM EDT to near the intersection of Flint River Road and Millville Road by approximately 704 PM EDT. Damage along much of the path was primarily uprooted trees and minor structural damage. The most intense damage occurred along Carpentar Road, roughly one quarter mile south of Stanley Road, at 700 PM EDT. A house was shifted off the foundation and an attached garage was destroyed at this location.

Hail in BAY, MICHIGAN
From 15-MAR-12 18:20:00 to 15-MAR-12 18:20:00 (EST-5)
Location: BAYSIDE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TUSCOLA, MICHIGAN
From 15-MAR-12 17:45:00 to 15-MAR-12 17:45:00 (EST-5)
Location: CARO MUNI ARPT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in HURON, MICHIGAN
From 15-MAR-12 14:31:00 to 15-MAR-12 14:31:00 (EST-5)
Location: HARBOR BEACH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Coast Guard