Thunderstorms developed along a cold front as it moved into an area of strong instability and enhanced low level vorticity over the southern James River Valley. The initial storms that developed along the front appeared weak but became tornadic, producing three tornadoes in LaMoure County. The first was the strongest and near the community of Berlin. The three tornadoes developed within 20 minutes of each other. The first severely damaged a pole barn structure to the west-southwest of Berlin, and was rated EF1. The other two tornadoes impacted no structures and so did not produce damage, and by National Weather Service policy were rated EFU (EF Unknown). Thereafter, large hail became the main threat, with storms producing one-inch diameter hail in both LaMoure and Dickey counties.

Hail in LA MOURE, NORTH DAKOTA
From 09-AUG-20 14:31:00 to 09-AUG-20 14:34:00 (CST-6)
Location: VERONA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LA MOURE, NORTH DAKOTA
From 09-AUG-20 14:35:00 to 09-AUG-20 14:38:00 (CST-6)
Location: VERONA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DICKEY, NORTH DAKOTA
From 09-AUG-20 14:51:00 to 09-AUG-20 14:53:00 (CST-6)
Location: GLOVER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in LA MOURE, NORTH DAKOTA
From 09-AUG-20 13:13:00 to 09-AUG-20 13:19:00 (CST-6)
Location: BERLIN
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

This tornado touched down south-southwest of Berlin and moved to the east-southeast. The tornado produced no damage to evaluate and so by National Weather Service policy was rated EFU, EF Unknown. This was the second of three tornadoes this day in LaMoure County, all within 20 minutes of each other.

Tornado in LA MOURE, NORTH DAKOTA
From 09-AUG-20 13:02:00 to 09-AUG-20 13:04:00 (CST-6)
Location: BERLIN
Tornado F-scale: EF1
Property damage: 225.00K
Crop damage: 15.00K
Reported by: Emergency Manager

This tornado touched down west-southwest of Berlin, and based on the damage that occurred was rated EF1. Near the point of touchdown, a pole barn on a farmstead was severely damaged. An overhead door and a bi-fold door were blown in, about one-third of the metal roofing panels were blown off, and the entire structure had an arc towards the north. Additional damage at the farmstead included a laid over van-style trailer and shingle damage to the house. The tornado then proceeded towards the east, causing  damage to a corn field. Tornado winds were estimated, based on the damage done, at around 95 mph, again, EF1. This was the first of three tornadoes this day in LaMoure County, all within 20 minutes of each other.

Tornado in LA MOURE, NORTH DAKOTA
From 09-AUG-20 13:19:00 to 09-AUG-20 13:20:00 (CST-6)
Location: BERLIN
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

This tornado touched down northeast of Berlin and moved to the east-southeast. The tornado produced no damage to evaluate and so by National Weather Service policy was rated EFU, EF Unknown. This was the third of three tornadoes this day in LaMoure County, all within 20 minutes of each other.