The evening of Sunday, July 5th, a line of thunderstorms developed along a frontal boundary from west central to northeast Minnesota. By 2 to 3 am CST, numerous thunderstorms began to develop in east central Minnesota, ahead of the main line.  As additional thunderstorms congealed with the main line, and deep moisture continued to surge toward western Wisconsin, the added effect of high precipitable water values resulted in rainfall rates increasing to 2-3 inches per hour. These storms moved eastward into west central Wisconsin.
Several hours of moderate to heavy rainfall occurred over St. Croix, Pierce and Dunn counties during the early morning hours of Monday, July 6th.
Storm totals ranged from 5-8 inches in portions of St. Croix and Pierce counties,  where locally 7.31 inches was measured around River Falls. The Kinnickinnic River near River Falls rose almost 7 feet in less than 5 hours.
The Troy Glen Trailer Park (consisting of about 20 homes) was evacuated to the Troy Town Hall, and the American Red Cross assisted in the displaced residents in Hudson. St. Croix and Dunn Counties reported some roads covered with water. Chippewa County reported the intersection of County Highway K and 170th Avenue (6 miles south of Cornell) was flooded.
County emergency management reported damage from municipalities, to roads, a couple bridges, culverts, ditches and houses with flooded basements. The hardest hit townships were Baldwin, Cady, Eau Galle, Kinnickinnic, Rush River, St. Joseph, Troy, Wilson, Woodville and especially River Falls.  Estimated damage to the flood in St. Croix County alone was $360,000.
The following are some of the higher rainfall totals from Monday morning, July 6th.
River Falls 7.31 inches.
St. Croix 7.10 inches.
Wheeler 4.90 inches.
Nye 4.12 inches.
Osceola 3.65 inches.

Flash Flood in ST. CROIX, WISCONSIN
From 06-JUL-15 03:30:00 to 06-JUL-15 08:30:00 (CST-6)
Location: HUDSON
Flood cause: Heavy Rain
Property damage: 360.00K
Crop damage: 0.00K
Reported by: Newspaper

The Troy Glen Trailer Park (consisting of about 20 homes) was evacuated to the Troy Town Hall due to flood waters, and the American Red Cross assisted in the displaced residents.

Heavy Rain in PIERCE, WISCONSIN
From 06-JUL-15 02:00:00 to 06-JUL-15 07:00:00 (CST-6)
Location: RIVER FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A measured rainfall report of 6.54 inches occurred in River Falls.

Flash Flood in DUNN, WISCONSIN
From 06-JUL-15 05:00:00 to 06-JUL-15 07:45:00 (CST-6)
Location: BOYCEVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flood waters closed Highway 12 near Knapp for several hours.

Flash Flood in DUNN, WISCONSIN
From 06-JUL-15 05:00:00 to 06-JUL-15 07:45:00 (CST-6)
Location: COLFAX
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Flood waters closed part of the road near the intersection of Highway 170 and County Road N.

Flash Flood in CHIPPEWA, WISCONSIN
From 06-JUL-15 05:00:00 to 06-JUL-15 07:45:00 (CST-6)
Location: JIM FALLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flood waters closed the intersection of Highway K and 170th Street south of Cornell.

Flash Flood in ST. CROIX, WISCONSIN
From 06-JUL-15 03:30:00 to 06-JUL-15 08:30:00 (CST-6)
Location: RIVER FALLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A Cul-De-Sac was flooded off Townsvalley Road.

Flash Flood in ST. CROIX, WISCONSIN
From 06-JUL-15 03:30:00 to 06-JUL-15 08:30:00 (CST-6)
Location: HUDSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water was running out of a drainage ditch and over Coulee Trail, one half mile east of Highway 35. The water eventually washed the road out.

Flash Flood in ST. CROIX, WISCONSIN
From 06-JUL-15 03:30:00 to 06-JUL-15 08:30:00 (CST-6)
Location: RIVER FALLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flood waters damaged a shoulder of County Road U near Glover Road.

Heavy Rain in PIERCE, WISCONSIN
From 06-JUL-15 02:00:00 to 06-JUL-15 06:00:00 (CST-6)
Location: RIVER FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS observer measured 6.50 inches in a 4 hour period just south of River Falls.

Heavy Rain in ST. CROIX, WISCONSIN
From 06-JUL-15 02:00:00 to 06-JUL-15 07:00:00 (CST-6)
Location: RIVER FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS observer measured 7.31 inches of rain in a 5 hour period north of River Falls.

Heavy Rain in ST. CROIX, WISCONSIN
From 06-JUL-15 02:00:00 to 06-JUL-15 07:00:00 (CST-6)
Location: HUDSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A measured rainfall report of 7.10 inches occurred east of Hudson.

Heavy Rain in CHIPPEWA, WISCONSIN
From 06-JUL-15 02:00:00 to 06-JUL-15 08:00:00 (CST-6)
Location: EAGLETON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A measured rainfall report of 5.67 inches occurred east of Eagleton.