A cold front moved across eastern North Dakota and the northwest quarter of Minnesota on Sunday, August 9th. Abundant moisture remained in place, with dew points in the upper 60s to lower 70s. Thunderstorms formed across the area, producing large hail, damaging wind gusts, and tornadoes.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 09-AUG-20 15:06:00 to 09-AUG-20 15:06:00 (CST-6)
Location: WASKISH
Magnitude: 61.00 EG
Reported by: Emergency Manager

Large trees were blown down in the Big Bog State Park. The DNR was called in to help cut trees to assist trapped campers.

Thunderstorm Wind in ROSEAU, MINNESOTA
From 09-AUG-20 13:37:00 to 09-AUG-20 13:37:00 (CST-6)
Location: WANNASKA
Magnitude: 57.00 MG
Reported by: Mesonet

The wind gust was measured by a NDAWN mesonet sensor.

Thunderstorm Wind in MARSHALL, MINNESOTA
From 09-AUG-20 13:51:00 to 09-AUG-20 13:51:00 (CST-6)
Location: ESPELIE
Magnitude: 65.00 EG
Reported by: Law Enforcement

The doors and end of a pole shed were blown out and trees were blown down. Debris damaged a house and a vehicle.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 09-AUG-20 15:27:00 to 09-AUG-20 15:27:00 (CST-6)
Location: SOLWAY
Magnitude: 65.00 EG
Reported by: Emergency Manager

Mature trees were blown down.

Thunderstorm Wind in POLK, MINNESOTA
From 09-AUG-20 14:45:00 to 09-AUG-20 14:45:00 (CST-6)
Location: WINGER
Magnitude: 52.00 EG
Reported by: Public

An apple tree was snapped with other large branches downed.

Thunderstorm Wind in MARSHALL, MINNESOTA
From 09-AUG-20 14:00:00 to 09-AUG-20 14:00:00 (CST-6)
Location: ESPELIE
Magnitude: 51.00 MG
Reported by: Mesonet

The wind gust was measured by a RAWS mesonet sensor.

Hail in HUBBARD, MINNESOTA
From 09-AUG-20 15:50:00 to 09-AUG-20 16:00:00 (CST-6)
Location: BECIDA
Magnitude: 1.00 
Reported by: Public

The hail was mostly pea to nickel sized.

Thunderstorm Wind in HUBBARD, MINNESOTA
From 09-AUG-20 16:30:00 to 09-AUG-20 16:30:00 (CST-6)
Location: NARY
Magnitude: 52.00 EG
Reported by: Trained Spotter

Large branches were blown down.

Tornado in BELTRAMI, MINNESOTA
From 09-AUG-20 14:20:00 to 09-AUG-20 14:22:00 (CST-6)
Location: MALCOLM
Tornado F-scale: EF1
Reported by: Post Office

A 100 yard gash was noted in the forest, with trees snapped at various heights. Peak winds were estimated at 100 mph.

Thunderstorm Wind in MARSHALL, MINNESOTA
From 09-AUG-20 13:42:00 to 09-AUG-20 13:42:00 (CST-6)
Location: ROSEWOOD
Magnitude: 56.00 EG
Reported by: Social Media

Two power poles were cracked and leaning along highway 59, south of county road 3.

Thunderstorm Wind in LAKE OF THE WOODS, MINNESOTA
From 09-AUG-20 15:00:00 to 09-AUG-20 15:00:00 (CST-6)
Location: CLEMENTSON
Magnitude: 52.00 EG
Reported by: Public

Large branches were blown down.

Hail in KITTSON, MINNESOTA
From 09-AUG-20 11:55:00 to 09-AUG-20 11:55:00 (CST-6)
Location: HUMBOLDT
Magnitude: 1.00 
Reported by: Public

Hail in KITTSON, MINNESOTA
From 09-AUG-20 12:12:00 to 09-AUG-20 12:12:00 (CST-6)
Location: LANCASTER ARPT
Magnitude: 1.00 
Reported by: Public

The hail was accompanied by heavy rain and strong wind.

Hail in MARSHALL, MINNESOTA
From 09-AUG-20 12:59:00 to 09-AUG-20 12:59:00 (CST-6)
Location: LUNA
Magnitude: 1.00 
Reported by: Public

Tornado in PENNINGTON, MINNESOTA
From 09-AUG-20 13:13:00 to 09-AUG-20 13:46:00 (CST-6)
Location: DAKOTA JCT
Tornado F-scale: EF1
Reported by: Trained Spotter

This tornado likely became wrapped in heavy rain and downburst winds at times along its intermittent path. The tornado snapped numerous trees in shelterbelts along its path, and cracked at least two power poles. Peak winds were estimated at 105 mph.

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 09-AUG-20 13:33:00 to 09-AUG-20 13:33:00 (CST-6)
Location: ST HILAIRE
Magnitude: 56.00 EG
Reported by: Social Media

Two oak trees were snapped in a farm yard.

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 09-AUG-20 13:35:00 to 09-AUG-20 13:35:00 (CST-6)
Location: (TVF)THIEF RVR FALLS
Magnitude: 67.00 MG
Reported by: AWOS

The wind gust was measured at the Thief River Falls airport.