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.

Hail in BENSON, NORTH DAKOTA
From 09-AUG-20 05:35:00 to 09-AUG-20 05:35:00 (CST-6)
Location: BAKER
Magnitude: 1.00 
Reported by: Public

The hail was mainly pea to penny sized.

Hail in WALSH, NORTH DAKOTA
From 09-AUG-20 09:45:00 to 09-AUG-20 09:45:00 (CST-6)
Location: LANKIN
Magnitude: 1.00 
Reported by: Public

Hail in PEMBINA, NORTH DAKOTA
From 09-AUG-20 11:05:00 to 09-AUG-20 11:05:00 (CST-6)
Location: MOUNTAIN
Magnitude: 1.25 
Reported by: Trained Spotter

The hail was mostly penny to nickel sized.

Hail in GRAND FORKS, NORTH DAKOTA
From 09-AUG-20 13:20:00 to 09-AUG-20 13:20:00 (CST-6)
Location: THOMPSON
Magnitude: 1.25 
Reported by: Public

The hail fell on Interstate 29, just north of the Thompson exit.

Hail in WALSH, NORTH DAKOTA
From 09-AUG-20 09:40:00 to 09-AUG-20 09:40:00 (CST-6)
Location: LANKIN
Magnitude: 0.75 
Reported by: Public

Pea to dime sized hail fell.

Hail in CAVALIER, NORTH DAKOTA
From 09-AUG-20 10:43:00 to 09-AUG-20 10:43:00 (CST-6)
Location: EASBY
Magnitude: 1.00 
Reported by: Public

Nickel to quarter sized hail fell with very heavy rain.

Thunderstorm Wind in CAVALIER, NORTH DAKOTA
From 09-AUG-20 10:50:00 to 09-AUG-20 10:50:00 (CST-6)
Location: MILTON
Magnitude: 52.00 EG
Reported by: Public

A few large tree branches were blown down.

Thunderstorm Wind in GRAND FORKS, NORTH DAKOTA
From 09-AUG-20 12:58:00 to 09-AUG-20 12:58:00 (CST-6)
Location: (GFK)GRAND FORKS INT
Magnitude: 56.00 MG
Reported by: ASOS

The wind gust was measured at the Grand Forks airport.

Funnel Cloud in BARNES, NORTH DAKOTA
From 09-AUG-20 13:12:00 to 09-AUG-20 13:12:00 (CST-6)
Location: ORISKA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

The funnel was viewed from Interstate 94.

Tornado in BARNES, NORTH DAKOTA
From 09-AUG-20 13:17:00 to 09-AUG-20 13:24:00 (CST-6)
Location: CUBA
Tornado F-scale: EF1
Reported by: Storm Chaser

This tornado and the preceding funnel were viewed from several angles and locations. The tornado snapped or shattered trees in at least one shelterbelt. Peak winds were estimated at 95 mph.

Funnel Cloud in TRAILL, NORTH DAKOTA
From 09-AUG-20 13:28:00 to 09-AUG-20 13:28:00 (CST-6)
Location: VOLGA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Two funnels were viewed from two storms northwest of Blanchard.

Hail in CASS, NORTH DAKOTA
From 09-AUG-20 13:39:00 to 09-AUG-20 13:39:00 (CST-6)
Location: MASON
Magnitude: 1.00 
Reported by: Public

Tornado in TRAILL, NORTH DAKOTA
From 09-AUG-20 13:40:00 to 09-AUG-20 13:46:00 (CST-6)
Location: VOLGA
Tornado F-scale: EF0
Reported by: Social Media

The tornado snapped branches and trees in several shelterbelts along its path. Peak winds were estimated at 70 mph.

Hail in TRAILL, NORTH DAKOTA
From 09-AUG-20 13:56:00 to 09-AUG-20 13:56:00 (CST-6)
Location: CALEDONIA
Magnitude: 1.00 
Reported by: Post Office

Hail in CASS, NORTH DAKOTA
From 09-AUG-20 14:30:00 to 09-AUG-20 14:30:00 (CST-6)
Location: HARWOOD
Magnitude: 0.88 
Reported by: Storm Chaser

Hail in RANSOM, NORTH DAKOTA
From 09-AUG-20 14:40:00 to 09-AUG-20 14:40:00 (CST-6)
Location: ENGLEVALE
Magnitude: 0.88 
Reported by: Trained Spotter

Funnel Cloud in TRAILL, NORTH DAKOTA
From 09-AUG-20 13:57:00 to 09-AUG-20 13:57:00 (CST-6)
Location: HILLSBORO ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A persistent wall cloud with a funnel were reported.

Tornado in CAVALIER, NORTH DAKOTA
From 09-AUG-20 10:58:00 to 09-AUG-20 10:59:00 (CST-6)
Location: OSNABROCK
Tornado F-scale: EF0
Crop damage: 50.00K
Reported by: Trained Spotter

A brief touchdown was noted and photographed in an open field, before the tornado became engulfed in downburst winds and heavy rain.  The tornado likely tracked for a half mile or less and ended by 1059 am CST.  Peak winds estimated to 80 mph.