Thunderstorms began to develop along a weak frontal boundary across southern Minnesota, between Springfield and Mankato. These storms moved to the east across portions of south central and east central Minnesota and spanned numerous reports of large hail, very heavy rainfall, and gusty winds. Most of the hail stones were one inch in diameter, however, a few reports of up to tennis ball size was reported near Mankato. These storms moved into west central Wisconsin and caused more hail near Lake Pepin. Another complex of storms moved across northeast South Dakota, and into west central Minnesota during the late evening. These storms caused more large hail reports during the early morning in east central Minnesota.

Hail in LE SUEUR, MINNESOTA
From 02-MAY-12 18:07:00 to 02-MAY-12 18:10:00 (CST-6)
Location: WATERVILLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Consistent hail of half dollar size was covering the ground from Waterville, and east to Calvary Cemetery.

Flash Flood in GOODHUE, MINNESOTA
From 02-MAY-12 19:45:00 to 02-MAY-12 22:45:00 (CST-6)
Location: WANAMINGO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rainfall across Goodhue County caused flooding on Highway 57, along the North Fork of the Zumbro River, north of Wanamingo, Minnesota.  In addition, over two inches of rainfall was measured near Wanamingo.

Hail in CHIPPEWA, MINNESOTA
From 02-MAY-12 21:38:00 to 02-MAY-12 21:38:00 (CST-6)
Location: WATSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POPE, MINNESOTA
From 02-MAY-12 21:50:00 to 02-MAY-12 21:50:00 (CST-6)
Location: HAREB
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in NICOLLET, MINNESOTA
From 02-MAY-12 17:18:00 to 02-MAY-12 17:24:00 (CST-6)
Location: NICOLLET
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous spotters and local law enforcement officials reported a swath of large hail, up to golf ball size, from 6 miles west of North Mankato, to just west of North Mankato.

Hail in KANDIYOHI, MINNESOTA
From 02-MAY-12 23:15:00 to 02-MAY-12 23:15:00 (CST-6)
Location: WILLMAR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MEEKER, MINNESOTA
From 02-MAY-12 23:58:00 to 02-MAY-12 23:58:00 (CST-6)
Location: GROVE CITY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in BROWN, MINNESOTA
From 02-MAY-12 16:34:00 to 02-MAY-12 16:46:00 (CST-6)
Location: HANSKA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several spotters and the emergency manager reported a swath of hail stones from near the Watonwan, Brown county line, northeast to the Brown, Blue Earth county line.  The largest hail stones were 1.25 inches in diameter.

Hail in RICE, MINNESOTA
From 02-MAY-12 18:28:00 to 02-MAY-12 18:30:00 (CST-6)
Location: WARSAW
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf ball size hail fell in Warsaw, Minnesota, it covered the ground in areas, and damaged numerous cars.

Hail in MEEKER, MINNESOTA
From 03-MAY-12 00:03:00 to 03-MAY-12 00:03:00 (CST-6)
Location: GROVE CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in RICE, MINNESOTA
From 02-MAY-12 18:36:00 to 02-MAY-12 18:36:00 (CST-6)
Location: SHEFFIELD MILL
Magnitude: 1.25 
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Local officials also reported hail damage to playground equipment, roofs and windows.

Flash Flood in RICE, MINNESOTA
From 02-MAY-12 19:00:00 to 02-MAY-12 22:00:00 (CST-6)
Location: FARIBAULT
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rainfall fell during the evening of May 2nd. Flooding was observed in the town of Faribault, especially in the southeast part of town where flood waters rose up to 5 feet in some residential areas. A local campground had flood waters close both their entrance and exit roads during the height of the storm.

Flash Flood in RICE, MINNESOTA
From 02-MAY-12 18:45:00 to 02-MAY-12 20:45:00 (CST-6)
Location: WARSAW
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rainfall occurred during the early evening of May 2nd. Flooding was observed in the town of Warsaw, with flood waters up to 5 feet in residential areas, stalled cars, and several roads impassable.

Hail in WRIGHT, MINNESOTA
From 03-MAY-12 01:21:00 to 03-MAY-12 01:21:00 (CST-6)
Location: BUFFALO MUNI ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in RICE, MINNESOTA
From 02-MAY-12 18:47:00 to 02-MAY-12 18:47:00 (CST-6)
Location: CANNON CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASECA, MINNESOTA
From 02-MAY-12 17:45:00 to 02-MAY-12 17:45:00 (CST-6)
Location: JANESVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in NICOLLET, MINNESOTA
From 02-MAY-12 17:25:00 to 02-MAY-12 17:33:00 (CST-6)
Location: NORTH MANKATO
Magnitude: 2.50 
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several spotters and local law enforcement officials reports a swath of very large hail from just west of North Mankato, to approximately 2 miles north of North Mankato.  Most of the hail was quarter to half dollar size, but a few reports of tennis ball size hail was noted.

Hail in RICE, MINNESOTA
From 02-MAY-12 18:15:00 to 02-MAY-12 18:15:00 (CST-6)
Location: MORRISTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In addition to quarter size hail, winds were measured at 51 mph in Morristown.

Hail in RICE, MINNESOTA
From 02-MAY-12 18:19:00 to 02-MAY-12 18:19:00 (CST-6)
Location: MORRISTOWN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MEEKER, MINNESOTA
From 03-MAY-12 00:20:00 to 03-MAY-12 00:20:00 (CST-6)
Location: LITCHFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm Wind in MEEKER, MINNESOTA
From 03-MAY-12 00:21:00 to 03-MAY-12 00:21:00 (CST-6)
Location: (Y69)LITCHFIELD MUNI
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several large tree branches and one large tree blew down in the southern part of Litchfield. In addition, a plane was flipped over at the Litchfield airport.

Hail in BLUE EARTH, MINNESOTA
From 02-MAY-12 17:10:00 to 02-MAY-12 17:10:00 (CST-6)
Location: LAKE CRYSTAL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BLUE EARTH, MINNESOTA
From 02-MAY-12 17:35:00 to 02-MAY-12 17:35:00 (CST-6)
Location: MANKATO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BROWN, MINNESOTA
From 02-MAY-12 17:45:00 to 02-MAY-12 17:45:00 (CST-6)
Location: DOTSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in BROWN, MINNESOTA
From 02-MAY-12 18:33:00 to 02-MAY-12 18:36:00 (CST-6)
Location: HANSKA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was observed for a few minutes north of Hanska, Minnesota.

Hail in BROWN, MINNESOTA
From 02-MAY-12 18:00:00 to 02-MAY-12 18:00:00 (CST-6)
Location: COBDEN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RICE, MINNESOTA
From 02-MAY-12 18:42:00 to 02-MAY-12 18:42:00 (CST-6)
Location: FARIBAULT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GOODHUE, MINNESOTA
From 02-MAY-12 18:40:00 to 02-MAY-12 18:40:00 (CST-6)
Location: ROSCOE CENTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAC QUI PARLE, MINNESOTA
From 02-MAY-12 20:40:00 to 02-MAY-12 20:40:00 (CST-6)
Location: ROSEN
Magnitude: 2.00 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in LAC QUI PARLE, MINNESOTA
From 02-MAY-12 21:08:00 to 02-MAY-12 21:08:00 (CST-6)
Location: LOUISBURG
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RICE, MINNESOTA
From 02-MAY-12 18:25:00 to 02-MAY-12 18:30:00 (CST-6)
Location: CANNON LAKE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail lasted for approximately five minutes south of Cannon Lake.

Hail in BROWN, MINNESOTA
From 02-MAY-12 18:47:00 to 02-MAY-12 18:47:00 (CST-6)
Location: NEW ULM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GOODHUE, MINNESOTA
From 02-MAY-12 19:27:00 to 02-MAY-12 19:27:00 (CST-6)
Location: ROSCOE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GOODHUE, MINNESOTA
From 02-MAY-12 19:30:00 to 02-MAY-12 19:30:00 (CST-6)
Location: WANAMINGO
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GOODHUE, MINNESOTA
From 02-MAY-12 18:43:00 to 02-MAY-12 18:43:00 (CST-6)
Location: ZUMBROTA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAC QUI PARLE, MINNESOTA
From 02-MAY-12 20:32:00 to 02-MAY-12 20:32:00 (CST-6)
Location: ROSEN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LAC QUI PARLE, MINNESOTA
From 02-MAY-12 20:42:00 to 02-MAY-12 20:42:00 (CST-6)
Location: ROSEN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CHIPPEWA, MINNESOTA
From 02-MAY-12 21:25:00 to 02-MAY-12 21:25:00 (CST-6)
Location: MILAN
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter