A cold front triggered a broken line of severe thunderstorms during the afternoon and evening hours of July 22nd.  A small tornado touched down in the Mississippi River and moved onshore into the Trempealeau National Wildlife Refuge (Trempealeau County) before dissipating. The only damage from the tornado was to hundreds of trees in the refuge. Otherwise, the storms produced a few more funnel clouds and some large hail. The largest hail reported was golf ball sized in Centerville (Trempealeau County).

Funnel Cloud in BUFFALO, WISCONSIN
From 22-JUL-13 15:48:00 to 22-JUL-13 15:48:00 (CST-6)
Location: BLUFF SIDING
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A funnel cloud was sighted over the Mississippi River southeast of Fountain City.

Hail in TREMPEALEAU, WISCONSIN
From 22-JUL-13 16:07:00 to 22-JUL-13 16:07:00 (CST-6)
Location: TREMPEALEAU
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in TREMPEALEAU, WISCONSIN
From 22-JUL-13 16:17:00 to 22-JUL-13 16:17:00 (CST-6)
Location: CENTERVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ping pong ball to golf ball sized hail fell in Centerville.

Hail in LA CROSSE, WISCONSIN
From 22-JUL-13 16:22:00 to 22-JUL-13 16:22:00 (CST-6)
Location: COUNCIL BAY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in LA CROSSE, WISCONSIN
From 22-JUL-13 16:46:00 to 22-JUL-13 16:46:00 (CST-6)
Location: COUNCIL BAY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in TREMPEALEAU, WISCONSIN
From 22-JUL-13 16:34:00 to 22-JUL-13 16:34:00 (CST-6)
Location: TREMPEALEAU
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Quarter sized hail was reported in the village of Trempealeau.

Hail in LA CROSSE, WISCONSIN
From 22-JUL-13 16:54:00 to 22-JUL-13 16:54:00 (CST-6)
Location: COUNCIL BAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Quarter sized hail partially covered the ground north of Holmen.

Funnel Cloud in TAYLOR, WISCONSIN
From 22-JUL-13 17:35:00 to 22-JUL-13 17:35:00 (CST-6)
Location: HANNIBAL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A brief funnel cloud was sighted north of Hannibal.

Hail in VERNON, WISCONSIN
From 22-JUL-13 18:17:00 to 22-JUL-13 18:17:00 (CST-6)
Location: STODDARD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Quarter sized hail was reported in Stoddard.

Hail in VERNON, WISCONSIN
From 22-JUL-13 19:00:00 to 22-JUL-13 19:00:00 (CST-6)
Location: VIROQUA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in VERNON, WISCONSIN
From 22-JUL-13 18:21:00 to 22-JUL-13 18:21:00 (CST-6)
Location: STODDARD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Several large tree branches were blown down northeast of Stoddard.

Tornado in TREMPEALEAU, WISCONSIN
From 22-JUL-13 16:15:00 to 22-JUL-13 16:20:00 (CST-6)
Location: CENTERVILLE
Tornado F-scale: EF0
Property damage: 22.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado began as a waterspout in the marsh waters just off the main channel of the Mississippi River southeast of Winona, Minnesota, but on the Wisconsin side.  White spray could be seen for some distance as the waterspout pulled up water into the funnel.  The tornado then moved onshore in the Trempealeau Wildlife Refuge and knocked down numerous trees for nearly a half mile.  Water plants were found on the refuge roads suggesting they were thrown some distance.