A cold front moved across North Dakota on the 26th, with a hot and humid airmass in place ahead of the front. At 6 pm CST, a surface low was located over southern Manitoba (Canada), just north of Pembina, ND. The cold front stretched to the southwest, back toward Devils Lake (ND) and Bismarck (ND). Ahead of the cold front, temperatures ranged in the low to mid 80s with dew points around 70F. Behind the front, temperatures did not cool significantly, but dew points dropped to the mid 40s. Thunderstorms began to form along and ahead of the cold front by early evening (from northeast ND into south central ND), eventually crossing into northwest Minnesota several hours later. Eight distinct tornadoes occurred over northeast North Dakota and northwest Minnesota during this event.

Hail in POLK, MINNESOTA
From 26-AUG-07 20:45:00 to 26-AUG-07 20:53:00 (CST-6)
Location: MALLORY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Forty-five mph winds occurred with gusts up to 60 mph. The hail lasted from 850 to 853 pm CST. 1.58 inches of rain fell in 35 minutes.

Hail in MARSHALL, MINNESOTA
From 26-AUG-07 21:15:00 to 26-AUG-07 21:15:00 (CST-6)
Location: MIDDLE RIVER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

About 1.75 inches of rain fell in 15 minutes.

Thunderstorm Wind in MARSHALL, MINNESOTA
From 26-AUG-07 20:44:00 to 26-AUG-07 20:44:00 (CST-6)
Location: MIDDLE RIVER
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Three to five inch diameter tree branches were blown down.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 26-AUG-07 22:50:00 to 26-AUG-07 22:50:00 (CST-6)
Location: REDLAKE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Powerlines and trees were blown down, blocking highway 1.

Thunderstorm Wind in RED LAKE, MINNESOTA
From 26-AUG-07 21:35:00 to 26-AUG-07 21:35:00 (CST-6)
Location: DOROTHY
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Four to five inch diameter tree limbs were blown down. Powerlines were also knocked down.

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 26-AUG-07 22:00:00 to 26-AUG-07 22:00:00 (CST-6)
Location: THIEF RIVER FALLS
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Four inch diameter tree limbs were blown down. Powerlines were also knocked down.

Thunderstorm Wind in KITTSON, MINNESOTA
From 26-AUG-07 19:18:00 to 26-AUG-07 19:26:00 (CST-6)
Location: DONALDSON
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind gust was measured by a MNDOT RWIS sensor.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 26-AUG-07 22:30:00 to 26-AUG-07 22:30:00 (CST-6)
Location: REDLAKE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

At the intersection of Minnesota 1 and 89 (on the south side of Lower Red Lake), powerlines were blown down.

Thunderstorm Wind in CLEARWATER, MINNESOTA
From 26-AUG-07 22:30:00 to 26-AUG-07 22:30:00 (CST-6)
Location: BERNER
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees and powerlines were knocked down.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 26-AUG-07 23:05:00 to 26-AUG-07 23:05:00 (CST-6)
Location: SAUM
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were blown down and a shed was destroyed.

Thunderstorm Wind in ROSEAU, MINNESOTA
From 26-AUG-07 20:07:00 to 26-AUG-07 20:07:00 (CST-6)
Location: GREENBUSH ARPT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

An airplane hanger was destroyed at the Greenbush Airport.

Hail in MARSHALL, MINNESOTA
From 26-AUG-07 20:20:00 to 26-AUG-07 20:20:00 (CST-6)
Location: MIDDLE RIVER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in MARSHALL, MINNESOTA
From 26-AUG-07 20:59:00 to 26-AUG-07 21:01:00 (CST-6)
Location: NEWFOLDEN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A couple intermittent and brief touchdowns occurred along the edge of a field and into a line of trees. The tornado travelled less than a half mile. A few large tree limbs were broken down. Peak winds were estimated at 80 mph.

Hail in POLK, MINNESOTA
From 26-AUG-07 21:10:00 to 26-AUG-07 21:10:00 (CST-6)
Location: CLIMAX
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in POLK, MINNESOTA
From 26-AUG-07 21:15:00 to 26-AUG-07 21:15:00 (CST-6)
Location: CROOKSTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Zero visibility was reported in very high winds and rain.

Thunderstorm Wind in POLK, MINNESOTA
From 26-AUG-07 21:35:00 to 26-AUG-07 21:35:00 (CST-6)
Location: CROOKSTON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs and power lines were blown down along the Polk and Red Lake County line.

Thunderstorm Wind in POLK, MINNESOTA
From 26-AUG-07 22:15:00 to 26-AUG-07 22:15:00 (CST-6)
Location: MAPLE BAY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large tree branches were blown down. Some penny to nickel sized hail also fell.

Hail in POLK, MINNESOTA
From 26-AUG-07 23:00:00 to 26-AUG-07 23:00:00 (CST-6)
Location: FERTILE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in KITTSON, MINNESOTA
From 26-AUG-07 19:55:00 to 26-AUG-07 19:55:00 (CST-6)
Location: KARLSTAD
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large branches were blown down just east of Pelan.

Lightning in MAHNOMEN, MINNESOTA
From 26-AUG-07 23:30:00 to 26-AUG-07 23:30:00 (CST-6)
Location: BEJOU
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck the bell tower of a church in Bejou, igniting a fire in the tower. The fire spread throughout the building, causing a total loss. The building had been recently renovated.

Thunderstorm Wind in MARSHALL, MINNESOTA
From 26-AUG-07 19:43:00 to 26-AUG-07 19:43:00 (CST-6)
Location: STEPHEN
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind gust was measured by a NDAWN mesonet wind sensor.

Tornado in MARSHALL, MINNESOTA
From 26-AUG-07 19:43:00 to 26-AUG-07 19:49:00 (CST-6)
Location: FLORIAN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado brushed the north edge of Marshall County Park, causing some tree damage. The tornado then took part of the roof off an old granary and blew down an old shed at an abandoned farm site one mile south of Florian. Peak winds were estimated at 105 mph.

Tornado in POLK, MINNESOTA
From 26-AUG-07 21:04:00 to 26-AUG-07 21:10:00 (CST-6)
Location: ELDRED
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado touched down at 9 pm CST about 7 miles east-northeast of Reynolds, North Dakota (in Grand Forks County). It crossed the Red River into western Polk County at about 904 pm CST. The total tornado path length was about 5 miles, and about 3 miles of the total occurred in Tynsid Township in Polk County. The tornado destroyed a steel pole shed and a wooden quonset at one farmstead with significant tree damage at other locations nearby. Peak winds were estimated at 120 mph.

Hail in POLK, MINNESOTA
From 26-AUG-07 21:07:00 to 26-AUG-07 21:07:00 (CST-6)
Location: ELDRED
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 26-AUG-07 22:00:00 to 26-AUG-07 22:00:00 (CST-6)
Location: (TVF)THIEF RVR FALLS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Several trees were blown down in the city of Thief River Falls.

Funnel Cloud in MARSHALL, MINNESOTA
From 26-AUG-07 20:55:00 to 26-AUG-07 20:55:00 (CST-6)
Location: NEWFOLDEN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter