During the evening of September 6th, thunderstorms developed north of a nearly stationary front across the west central portions of Wisconsin. The first round of thunderstorms produced some locally heavy rains and damaging winds. A tree was blown down onto a house in Merrillan (Jackson County) and another house near Warrens (Monroe County) sustained roof and siding damage from the winds. A second round of thunderstorms then developed and moved very slowly over the same area as the previous storms. With already wet soils, the heavy rain from this second round of storms produced flash flooding across the very northern sections of Trempealeau County into northern Jackson County and southern Clark County. In Eleva (Trempealeau County), flood waters covered State Highway 93 and U.S. Highway 10 and caused around $400 thousand in damage to a food business. Numerous homes and businesses in Osseo sustained water damage from flooding along the North and South Forks of the Buffalo River. The flood waters covered or washed out numerous roads in Jackson and Clark Counties. Two accidents occurred in Jackson County when people tried to drive their vehicles over water covered roads that had been washed out. The dam at Emerson Lake (Clark County) was damaged by the flood waters with repairs estimated at almost a quarter of a million dollars. State of Emergencies were declared in Jackson and Trempealeau Counties. Total damages were estimated at $1.8 million in Trempealeau County, $800 thousand in Clark County and $400 thousand in Jackson County.

Thunderstorm Wind in MONROE, WISCONSIN
From 06-SEP-15 17:28:00 to 06-SEP-15 17:28:00 (CST-6)
Location: WARRENS
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down and damage to a roof and siding occurred in Warrens.

Thunderstorm Wind in JACKSON, WISCONSIN
From 06-SEP-15 16:01:00 to 06-SEP-15 16:01:00 (CST-6)
Location: ALMA CENTER
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down along old Highway 95 between Merrillan and Alma Center.

Flood in BUFFALO, WISCONSIN
From 06-SEP-15 20:26:00 to 06-SEP-15 23:00:00 (CST-6)
Location: MONDOVI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Street flooding occurred in Mondovi from locally heavy rains.

Flash Flood in CLARK, WISCONSIN
From 06-SEP-15 21:42:00 to 06-SEP-15 23:45:00 (CST-6)
Location: GREENWOOD
Flood cause: Heavy Rain
Property damage: 1.10M
Crop damage: 0.00K
Reported by: Law Enforcement

Flood waters from the Black River covered County Road G just west of Greenwood. Waters flowing through a drainage ditch undercut Chickadee Road near Gorman Avenue southwest of Willard. County Highway M was closed north of County Highway I when a culvert was washed out. This is the second time in three years that this section of County M has been washed out. County Highway B was undermined by water west of Humbird. The flood waters also prompted the closing of the county's ATV and horse trails. The flood waters damaged the dam at Emerson Lake with repairs estimated to cost almost a quarter of a million dollars. Highway damage along was estimated at $536,200.

Flash Flood in TREMPEALEAU, WISCONSIN
From 06-SEP-15 21:47:00 to 07-SEP-15 01:15:00 (CST-6)
Location: ELEVA
Flood cause: Heavy Rain
Property damage: 1.45M
Crop damage: 0.00K
Reported by: Law Enforcement

Flood waters from Adams Creek went over State Highway 93 just north of Eleva and U.S. Highway 10 on the east side of Eleva. One business and one home suffered major damage from the flood waters. The business, a food wholesaler, suffered damage to a food storage building, had around 30% of their frozen food inventory destroyed and several diesel trucks were damaged causing an estimated $400 thousand in damages. The home suffered major damage when the basement completely filled with water and the main floor was also covered with water. Six other businesses in Eleva sustained minor water damage. The flood waters along the Buffalo River caused the Buffalo River State Trail to be shut down west of Eleva into Buffalo County.

Thunderstorm Wind in MONROE, WISCONSIN
From 06-SEP-15 22:43:00 to 06-SEP-15 22:43:00 (CST-6)
Location: SPARTA
Magnitude: 40.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts to around 45 mph knocked down several small trees on the north side of Sparta.

Flash Flood in JACKSON, WISCONSIN
From 06-SEP-15 23:55:00 to 07-SEP-15 01:00:00 (CST-6)
Location: REQUA
Flood cause: Heavy Rain
Property damage: 400.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flood waters from Schoolhouse Creek caused U.S. Highways 10 and 12 to be closed in the extreme northern part of Jackson County east of Price. Numerous other roads were washed out with general flooding across the northern sections of the county covering much of the Townships of Cleveland and Garfield. Two accidents occurred when the drivers attempted to drive their vehicles over water covered roads that had been washed out. Three residents were stranded when flood waters overtook a dead end road in the Town of Cleveland. There were no reports of damage to private property with the damage limited to roads.

Flood in TREMPEALEAU, WISCONSIN
From 07-SEP-15 04:25:00 to 07-SEP-15 16:30:00 (CST-6)
Location: OSSEO
Flood cause: Heavy Rain
Property damage: 360.00K
Crop damage: 0.00K
Reported by: Law Enforcement

In Osseo, sandbagging was done along the North Fork of the Buffalo River and firemen went door to door to alert residents of flooding along the South Fork of the Buffalo River. The heavy rain also flooded numerous basements throughout town with about 40 structures sustaining minor water damage. The flood waters along the Buffalo River caused the Buffalo River State Trail to be shut down from west of Osseo into Jackson County.

Heavy Rain in CLARK, WISCONSIN
From 06-SEP-15 20:40:00 to 07-SEP-15 01:00:00 (CST-6)
Location: SPOKEVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

East of Loyal, 4.75 inches of rain fell.

Heavy Rain in TREMPEALEAU, WISCONSIN
From 06-SEP-15 14:45:00 to 06-SEP-15 22:00:00 (CST-6)
Location: OSSEO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

In Osseo, 6.95 inches of rain fell.

Heavy Rain in TREMPEALEAU, WISCONSIN
From 06-SEP-15 12:45:00 to 06-SEP-15 21:35:00 (CST-6)
Location: ELEVA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

In Eleva, six inches of rain fell.

Heavy Rain in CLARK, WISCONSIN
From 06-SEP-15 16:00:00 to 06-SEP-15 22:45:00 (CST-6)
Location: CHRISTIE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

An estimated five inches of rain fell south of Christie.

Heavy Rain in JACKSON, WISCONSIN
From 06-SEP-15 16:15:00 to 06-SEP-15 22:35:00 (CST-6)
Location: HATFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

In Hatfield, an estimated four inches of rain fell.

Flood in JACKSON, WISCONSIN
From 07-SEP-15 08:15:00 to 07-SEP-15 23:10:00 (CST-6)
Location: VAUDREUIL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the Black River out of its banks in Black River Falls. The river crested at 50.01 feet which was three feet over the flood stage.