A line of thunderstorms that developed in northern Minnesota, sagged southward into central Minnesota during the morning of Thursday, July 12th. High rainfall rates, and training of the storms, caused up to five inches of rain (based on radar) in less than three hours in northern Kanabec County. This amount of rainfall produced flash flooding, and local officials indicated damage to many county roads throughout the county. The heaviest rainfall total was 7.04 inches near Mora. One of the storms moved quickly across southern Mille Lacs County and produced wind damage in Princeton.

Thunderstorm Wind in MILLE LACS, MINNESOTA
From 12-JUL-18 09:30:00 to 12-JUL-18 09:32:00 (CST-6)
Location: PRINCETON
Magnitude: 56.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tin roof blew off a business in Princeton.  The roof came off in three large pieces and landed in an adjacent parking lot.  It appears to have been tin sheets placed over the shingles.  The shingle roof was still in place.  The tin landed on an SUV in the parking lot and caused damage to the vehicle.  A few power poles, and power lines were also blown down in Princeton.

Flash Flood in KANABEC, MINNESOTA
From 12-JUL-18 06:30:00 to 12-JUL-18 08:30:00 (CST-6)
Location: OGILVIE
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: State Official

Several roads were closed around Mora due to high running water and stranded cars. A few inches of flowing water covered Highway 3, near the intersection of Highway 65, north of Mora.  Plus, the county sheriff officials reported that nearly all gravel roads in Kanabec County suffered damage from flood waters. The Fish Lake Resort that is on south side of the lake was flood damage due to the rising lake level. Trailers in the resort had flood damage as water levels impacted the park.

Heavy Rain in ISANTI, MINNESOTA
From 11-JUL-18 06:00:00 to 12-JUL-18 06:00:00 (CST-6)
Location: BRAHAM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A measured rainfall report of 3.07 inches fell west near Braham in 24 hours.

Heavy Rain in MILLE LACS, MINNESOTA
From 11-JUL-18 18:30:00 to 12-JUL-18 06:30:00 (CST-6)
Location: PAGE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A measured rainfall report of 3.43 inches fell north of Page in 12 hours.

Heavy Rain in KANABEC, MINNESOTA
From 11-JUL-18 07:00:00 to 12-JUL-18 07:00:00 (CST-6)
Location: MORA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A measured rainfall report of 6.00 inches fell north of Mora in 24 hours.

Heavy Rain in KANABEC, MINNESOTA
From 11-JUL-18 19:00:00 to 12-JUL-18 07:00:00 (CST-6)
Location: MORA ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A measured rainfall report of 7.04 inches fell in Mora in 12 hours.

Heavy Rain in KANABEC, MINNESOTA
From 11-JUL-18 08:00:00 to 12-JUL-18 08:00:00 (CST-6)
Location: GRASSTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A measured rainfall report of 6.48 inches fell near Grasston in 24 hours.

Heavy Rain in KANABEC, MINNESOTA
From 11-JUL-18 08:00:00 to 12-JUL-18 08:00:00 (CST-6)
Location: MORA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A measured rainfall report of 6.80 inches fell south of Mora in 24 hours.