A narrow axis of enhanced instability developed ahead of an approaching cold front. The instability then expanded eastward, with deep layer shear increasing. Widespread severe weather developed over western and portions of central North Dakota, with multiple reports of damage. Extensive damage occurred in the city of Hettinger, where many homes and a car dealership with around 50 cars suffered losses. The largest hail was baseball size, and fell over Adams County, while the strongest wind gust of 75 mph occurred in Morton County. There was also an EF0 tornado near Glen Ullin, Morton County.

Hail in BOWMAN, NORTH DAKOTA
From 26-JUN-18 17:48:00 to 26-JUN-18 17:52:00 (MST-7)
Location: BOWMAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DUNN, NORTH DAKOTA
From 26-JUN-18 17:50:00 to 26-JUN-18 17:54:00 (MST-7)
Location: MARSHALL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in BOWMAN, NORTH DAKOTA
From 26-JUN-18 17:51:00 to 26-JUN-18 17:54:00 (MST-7)
Location: BOWMAN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Funnel Cloud in STARK, NORTH DAKOTA
From 26-JUN-18 18:02:00 to 26-JUN-18 18:04:00 (MST-7)
Location: DICKINSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in WARD, NORTH DAKOTA
From 26-JUN-18 18:15:00 to 26-JUN-18 18:17:00 (CST-6)
Location: BURLINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ADAMS, NORTH DAKOTA
From 26-JUN-18 18:20:00 to 26-JUN-18 18:23:00 (MST-7)
Location: REEDER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated wind gusts of 60 mph.

Hail in ADAMS, NORTH DAKOTA
From 26-JUN-18 18:27:00 to 26-JUN-18 18:30:00 (MST-7)
Location: BUCYRUS
Magnitude: 2.75 
Property damage: 70.00K
Crop damage: 0.00K
Reported by: Public

Siding was damaged and windows were broken on a home. Roofs were damaged, along with vehicles.

Hail in ADAMS, NORTH DAKOTA
From 26-JUN-18 18:45:00 to 26-JUN-18 18:48:00 (MST-7)
Location: HETTINGER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in ADAMS, NORTH DAKOTA
From 26-JUN-18 18:53:00 to 26-JUN-18 18:56:00 (MST-7)
Location: HETTINGER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MORTON, NORTH DAKOTA
From 26-JUN-18 19:34:00 to 26-JUN-18 19:37:00 (CST-6)
Location: HEBRON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 26-JUN-18 19:36:00 to 26-JUN-18 19:39:00 (CST-6)
Location: HEBRON
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported tree branches down in Hebron. Diameter of the branches is unknown.

Hail in MORTON, NORTH DAKOTA
From 26-JUN-18 19:50:00 to 26-JUN-18 19:53:00 (CST-6)
Location: GLEN ULLIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in MORTON, NORTH DAKOTA
From 26-JUN-18 19:53:00 to 26-JUN-18 19:54:00 (CST-6)
Location: GLEN ULLIN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The tornado remained over rural areas north of Glen Ullin and impacted no structures. Therefore, the tornado was rated EF0. A wind gust of 66 mph occurred at the Glen Ullin airport west of town. Estimated winds of 75 mph in Glen Ullin resulted in damage to trees in the city. This damage was associated with the Rear Flank Downdraft high wind of the tornado and not the tornado itself.

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 26-JUN-18 19:55:00 to 26-JUN-18 19:58:00 (CST-6)
Location: GLEN ULLIN
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

See the StormData entries for this area related to damage in Glen Ullin and a tornado north of the city.

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 26-JUN-18 19:56:00 to 26-JUN-18 19:59:00 (CST-6)
Location: GLEN ULLIN
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several large trees and numerous branches were down in the city of Glen Ullin, caused by the high wind. There was a tornado north of the city around the same time. The tornado itself impacted no structures and was rated EF0. A wind gust of 66 mph was measured at the Glen Ullin airport. The high wind at the airport and through the city was associated with the Rear Flank Downdraft of the tornado and not the tornado itself.

Hail in MERCER, NORTH DAKOTA
From 26-JUN-18 20:00:00 to 26-JUN-18 20:03:00 (CST-6)
Location: BEULAH
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in ADAMS, NORTH DAKOTA
From 26-JUN-18 21:25:00 to 26-JUN-18 21:29:00 (MST-7)
Location: REEDER
Magnitude: 1.75 
Property damage: 60.00K
Crop damage: 40.00K
Reported by: Trained Spotter

The hail combined with strong wind gusts to cause damage in the community of Reeder.

Hail in BOWMAN, NORTH DAKOTA
From 26-JUN-18 21:30:00 to 26-JUN-18 21:33:00 (MST-7)
Location: BOWMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ADAMS, NORTH DAKOTA
From 26-JUN-18 21:48:00 to 26-JUN-18 22:00:00 (MST-7)
Location: HETTINGER ARPT
Magnitude: 1.75 
Property damage: 500.00K
Crop damage: 250.00K
Reported by: Law Enforcement

Widespread damage was reported in and around Hettinger. A car dealership with approximately 50 vehicles sustained heavy damage. Broken windows were reported throughout town. Significant crop damage occurred around the area.

Hail in ADAMS, NORTH DAKOTA
From 26-JUN-18 22:10:00 to 26-JUN-18 22:13:00 (MST-7)
Location: HAYNES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in RENVILLE, NORTH DAKOTA
From 26-JUN-18 15:11:00 to 26-JUN-18 15:14:00 (CST-6)
Location: TOLLEY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in RENVILLE, NORTH DAKOTA
From 26-JUN-18 15:35:00 to 26-JUN-18 15:37:00 (CST-6)
Location: TOLLEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RENVILLE, NORTH DAKOTA
From 26-JUN-18 15:55:00 to 26-JUN-18 16:00:00 (CST-6)
Location: TOLLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RENVILLE, NORTH DAKOTA
From 26-JUN-18 15:55:00 to 26-JUN-18 15:58:00 (CST-6)
Location: LORAINE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SLOPE, NORTH DAKOTA
From 26-JUN-18 16:53:00 to 26-JUN-18 16:56:00 (MST-7)
Location: AMIDON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in STARK, NORTH DAKOTA
From 26-JUN-18 17:12:00 to 26-JUN-18 17:15:00 (MST-7)
Location: DICKINSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DUNN, NORTH DAKOTA
From 26-JUN-18 17:42:00 to 26-JUN-18 17:45:00 (MST-7)
Location: MARSHALL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BOWMAN, NORTH DAKOTA
From 26-JUN-18 17:46:00 to 26-JUN-18 17:49:00 (MST-7)
Location: BOWMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public