A warm front remained nearly stationary across central Iowa and northern Illinois during the evening hours of September 15th. A complex of thunderstorms developed north of the warm front and tracked across portions of southeast Minnesota. The thunderstorms knocked down trees, produced a sixty-one mile per hour wind gust at the Austin Municipal airport (Mower County) and golf ball size hail near Nodine (Winona County).

Thunderstorm Wind in MOWER, MINNESOTA
From 15-SEP-10 18:45:00 to 15-SEP-10 18:45:00 (CST-6)
Location: LANSING
Magnitude: 50.00 EG
Property damage: 2.50K
Crop damage: 0.00K
Reported by: Broadcast Media

A fence was blown onto an automobile and a large tree was blown into power lines.

Thunderstorm Wind in MOWER, MINNESOTA
From 15-SEP-10 21:35:00 to 15-SEP-10 21:35:00 (CST-6)
Location: AUSTIN
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The automated weather observing equipment at the Austin airport measured a sixty-one mile per hour wind gust.

Thunderstorm Wind in WINONA, MINNESOTA
From 15-SEP-10 22:00:00 to 15-SEP-10 22:00:00 (CST-6)
Location: HART
Magnitude: 56.00 EG
Property damage: 2.50K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down in the township of Hart.

Thunderstorm Wind in WINONA, MINNESOTA
From 15-SEP-10 22:03:00 to 15-SEP-10 22:03:00 (CST-6)
Location: WINONA
Magnitude: 52.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A street light pole and stop lights were blown down in the city of Winona.

Thunderstorm Wind in WINONA, MINNESOTA
From 15-SEP-10 22:10:00 to 15-SEP-10 22:10:00 (CST-6)
Location: LAMOILLE
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Small trees were knocked down along County Road 7.

Flood in WINONA, MINNESOTA
From 15-SEP-10 23:30:00 to 16-SEP-10 01:30:00 (CST-6)
Location: NEW HARTFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was over roads near the intersection of County Roads 125 and 5.

Hail in FILLMORE, MINNESOTA
From 15-SEP-10 21:08:00 to 15-SEP-10 21:08:00 (CST-6)
Location: PETERSON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FILLMORE, MINNESOTA
From 15-SEP-10 21:10:00 to 15-SEP-10 21:10:00 (CST-6)
Location: PETERSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FILLMORE, MINNESOTA
From 15-SEP-10 21:16:00 to 15-SEP-10 21:16:00 (CST-6)
Location: BRATSBERG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HOUSTON, MINNESOTA
From 15-SEP-10 21:25:00 to 15-SEP-10 21:25:00 (CST-6)
Location: MONEY CREEK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WINONA, MINNESOTA
From 15-SEP-10 22:05:00 to 15-SEP-10 22:05:00 (CST-6)
Location: NODINE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flood in WINONA, MINNESOTA
From 15-SEP-10 22:00:00 to 16-SEP-10 00:00:00 (CST-6)
Location: GOODVIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Squad cars were pulled from flooded streets by tow trucks.

Thunderstorm Wind in MOWER, MINNESOTA
From 15-SEP-10 18:44:00 to 15-SEP-10 18:44:00 (CST-6)
Location: RAMSEY
Magnitude: 50.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Six trees were blown down and a camper was blown over.