A cold front moved across southeast Minnesota late in the evening of August 11, triggering a line of severe thunderstorms. Hail up to the size of golf balls was reported by storm spotters and law enforcement officials. In addition, wind gusts of 60 to 65 mph were common, with a gust of 74 mph recorded at the Rochester International Airport.

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 20:43:00 to 11-AUG-07 20:43:00 (CST-6)
Location: GENOA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 20:43:00 to 11-AUG-07 20:43:00 (CST-6)
Location: SALEM CORNERS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 20:55:00 to 11-AUG-07 20:55:00 (CST-6)
Location: ROCHESTER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 21:03:00 to 11-AUG-07 21:03:00 (CST-6)
Location: (RST)ROCHESTER MUNI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 21:06:00 to 11-AUG-07 21:06:00 (CST-6)
Location: ROCHESTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 21:08:00 to 11-AUG-07 21:08:00 (CST-6)
Location: ROCHESTER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 21:18:00 to 11-AUG-07 21:18:00 (CST-6)
Location: SIMPSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in DODGE, MINNESOTA
From 11-AUG-07 20:26:00 to 11-AUG-07 20:26:00 (CST-6)
Location: KASSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 20:28:00 to 11-AUG-07 20:28:00 (CST-6)
Location: BYRON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in WINONA, MINNESOTA
From 11-AUG-07 21:30:00 to 11-AUG-07 21:30:00 (CST-6)
Location: WINONA
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power line down in the western part of the city of Winona.

Thunderstorm Wind in FILLMORE, MINNESOTA
From 11-AUG-07 21:51:00 to 11-AUG-07 21:51:00 (CST-6)
Location: WHALAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 21:02:00 to 11-AUG-07 21:02:00 (CST-6)
Location: ROCHESTER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter to golf ball sized hail was reported 2 miles south of the Highway 52 / 63 intersection.

Hail in OLMSTED, MINNESOTA
From 11-AUG-07 21:08:00 to 11-AUG-07 21:08:00 (CST-6)
Location: (RST)ROCHESTER MUNI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Occurred at the Rochester International Airport.

Thunderstorm Wind in WABASHA, MINNESOTA
From 11-AUG-07 21:14:00 to 11-AUG-07 21:14:00 (CST-6)
Location: PLAINVIEW
Magnitude: 56.00 EG
Property damage: 2.50K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down.

Hail in FILLMORE, MINNESOTA
From 11-AUG-07 21:30:00 to 11-AUG-07 21:37:00 (CST-6)
Location: WASHINGTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Dime to nickel sized hail fell for about 7 minutes.

Thunderstorm Wind in FILLMORE, MINNESOTA
From 11-AUG-07 21:30:00 to 11-AUG-07 21:30:00 (CST-6)
Location: WASHINGTON
Magnitude: 56.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Public

A few trees were knocked down.

Thunderstorm Wind in OLMSTED, MINNESOTA
From 11-AUG-07 21:05:00 to 11-AUG-07 21:05:00 (CST-6)
Location: (RST)ROCHESTER MUNI
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust of 74 miles per hour was measured at the Rochester International Airport.