Isolated supercellular thunderstorms developed during the early evening hours of  July 11th, along a weak surface boundary stretched across western North Dakota. Thunderstorm development was aided by sufficient deep layer shear and by large scale ascent ahead of an approaching upper level jet streak. Several severe thunderstorm and tornado warnings were issued. Several reports of large hail and severe thunderstorm wind gusts were received through the evening hours of the 11th and into the early morning hours of the 12th. One report of a tornado was also received.

Hail in BURKE, NORTH DAKOTA
From 11-JUL-09 20:38:00 to 11-JUL-09 20:43:00 (CST-6)
Location: POWERS LAKE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MERCER, NORTH DAKOTA
From 11-JUL-09 22:52:00 to 11-JUL-09 23:06:00 (CST-6)
Location: BEULAH
Magnitude: 56.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Severe thunderstorm wind gusts resulted in some tree damage in and around Beulah.

Thunderstorm Wind in MERCER, NORTH DAKOTA
From 11-JUL-09 23:00:00 to 11-JUL-09 23:13:00 (CST-6)
Location: STANTON
Magnitude: 61.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Newspaper

Severe thunderstorm wind gusts resulted in extensive tree damage in and around Stanton. Several windows were blown out.

Hail in STARK, NORTH DAKOTA
From 11-JUL-09 17:37:00 to 11-JUL-09 17:42:00 (MST-7)
Location: GLADSTONE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MCLEAN, NORTH DAKOTA
From 11-JUL-09 22:41:00 to 11-JUL-09 22:46:00 (CST-6)
Location: GARRISON MUNI ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Tornado in STARK, NORTH DAKOTA
From 11-JUL-09 17:55:00 to 11-JUL-09 18:05:00 (MST-7)
Location: GLADSTONE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained weather spotters reported this tornado touchdown in open country in the vicinity of Gladstone. The tornado impacted no objects. There was no damage and there were no injuries.

Thunderstorm Wind in DIVIDE, NORTH DAKOTA
From 11-JUL-09 18:30:00 to 11-JUL-09 18:40:00 (CST-6)
Location: CROSBY
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Severe thunderstorm wind gusts resulted in broken tree branches, tipped over grain bins, and some broken windows.

Thunderstorm Wind in EMMONS, NORTH DAKOTA
From 12-JUL-09 01:27:00 to 12-JUL-09 01:33:00 (CST-6)
Location: TEMVIK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported an estimated severe thunderstorm wind gust of 60 mph.

Thunderstorm Wind in MOUNTRAIL, NORTH DAKOTA
From 11-JUL-09 20:55:00 to 11-JUL-09 21:00:00 (CST-6)
Location: STANLEY
Magnitude: 69.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained weather spotters reported damage from the severe thunderstorm wind gusts. A small metal building was reported blown into a ditch, numerous tree branches were blown down, and one window was reported blown out of a trailer home.

Hail in GRANT, NORTH DAKOTA
From 11-JUL-09 19:25:00 to 11-JUL-09 19:30:00 (MST-7)
Location: NEW LEIPZIG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in STARK, NORTH DAKOTA
From 11-JUL-09 17:30:00 to 11-JUL-09 17:38:00 (MST-7)
Location: DICKINSON
Magnitude: 1.50 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Vehicles were dented by the hail.