In the mid afternoon hours of Monday, July 12th, Severe Thunderstorm Watch number 461 was issued for far western North Dakota. This was in anticipation of thunderstorms developing ahead of a potent short wave trough advecting northeast across the central Rockies and into the Northern High Plains region. Ahead of this feature, strong moisture advection combined with steep lapse rates and strengthening vertical shear parameters to create a favorable atmosphere for organized storms.
Severe Thunderstorm Watch number 463 was issued later Monday evening to include all of west and portions of central North Dakota, as ongoing severe thunderstorms over western North Dakota were expected to continue and advect to the east along and ahead of a frontal boundary stretched across the western Dakotas.
Several severe thunderstorm and tornado warnings were issued. Several reports of large hail, two reports of severe thunderstorm winds, and one confirmed tornado occurred during this episode.

Tornado in MOUNTRAIL, NORTH DAKOTA
From 12-JUL-10 19:16:00 to 12-JUL-10 19:20:00 (CST-6)
Location: MANITOU
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

This tornado touched down in rural Mountrail County. It impacted no structures and so there were no reports of damage. It was rated EF0.

Funnel Cloud in MOUNTRAIL, NORTH DAKOTA
From 12-JUL-10 19:30:00 to 12-JUL-10 19:32:00 (CST-6)
Location: ROSS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

This funnel cloud lasted for two minutes, and did not reach the surface.

Hail in STARK, NORTH DAKOTA
From 12-JUL-10 19:50:00 to 12-JUL-10 20:00:00 (MST-7)
Location: DICKINSON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MOUNTRAIL, NORTH DAKOTA
From 12-JUL-10 20:23:00 to 12-JUL-10 20:32:00 (CST-6)
Location: PALERMO
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MOUNTRAIL, NORTH DAKOTA
From 12-JUL-10 20:21:00 to 12-JUL-10 20:30:00 (CST-6)
Location: STANLEY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BOWMAN, NORTH DAKOTA
From 12-JUL-10 22:15:00 to 12-JUL-10 22:19:00 (MST-7)
Location: BUFFALO SPGS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in STARK, NORTH DAKOTA
From 12-JUL-10 19:45:00 to 12-JUL-10 20:00:00 (MST-7)
Location: DICKINSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rotating wall clouds were also observed over Dickinson. There were no confirmed reports of funnel clouds.

Thunderstorm Wind in WILLIAMS, NORTH DAKOTA
From 12-JUL-10 23:36:00 to 12-JUL-10 23:44:00 (CST-6)
Location: WILLISTON
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Hail in WILLIAMS, NORTH DAKOTA
From 12-JUL-10 23:51:00 to 12-JUL-10 23:53:00 (CST-6)
Location: (ISN)SLOULIN FLD WIL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in WILLIAMS, NORTH DAKOTA
From 13-JUL-10 01:10:00 to 13-JUL-10 01:20:00 (CST-6)
Location: ALAMO
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The strong thunderstorm winds resulted in a quonset door blown in.