Tornado Watch number 426 and Severe Thunderstorm Watch number 427 were both in effect during this event.
Very high instability with CAPE around 5000 J/KG set the stage for severe thunderstorms during the afternoon and evening. Large scale ascent ahead of an upper level jet streak coupled with several embedded short wave troughs were the triggers for convection. Storm phase was initially supercellular early in this event with both large hail and strong winds reported. By the late afternoon the storms had congealed into a bowing line with widespread severe winds from the Missouri River Valley through the James River Valley. A National Weather Service damage survey determined winds as high as 105 miles per hour occurred in Foster County.

Thunderstorm Wind in STUTSMAN, NORTH DAKOTA
From 21-JUL-14 17:51:00 to 21-JUL-14 18:02:00 (CST-6)
Location: MEDINA
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees fourteen inches in diameter were blown down.

Thunderstorm Wind in FOSTER, NORTH DAKOTA
From 21-JUL-14 18:15:00 to 21-JUL-14 18:25:00 (CST-6)
Location: MELVILLE
Magnitude: 74.00 EG
Property damage: 125.00K
Crop damage: 200.00K
Reported by: NWS Storm Survey

A semi truck was blown over on Highway 281 near Melville and trees three feet in diameter were uprooted. Crop damage was extensive.

Thunderstorm Wind in BURLEIGH, NORTH DAKOTA
From 21-JUL-14 16:25:00 to 21-JUL-14 16:30:00 (CST-6)
Location: FT LINCOLN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Small hail accompanied the strong winds.

Thunderstorm Wind in BURLEIGH, NORTH DAKOTA
From 21-JUL-14 16:33:00 to 21-JUL-14 16:38:00 (CST-6)
Location: (BIS)BISMARCK MUNI A
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain accompanied the strong winds.

Thunderstorm Wind in FOSTER, NORTH DAKOTA
From 21-JUL-14 18:20:00 to 21-JUL-14 18:35:00 (CST-6)
Location: BORDULAC
Magnitude: 91.00 EG
Property damage: 2.00M
Crop damage: 1.00M
Reported by: NWS Storm Survey

Severe thunderstorm winds of 65 to 105 miles per hour tore across Foster County causing extensive damage on many farms and in towns. Damage included grain bins destroyed, a grain elevator severely damaged, roofs torn off of outbuildings, and damage to homes. Vehicle damage was also surveyed, including to a semi tractor that was struck by a grain bin. Agricultural damage was severe and extensive.

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 21-JUL-14 15:45:00 to 21-JUL-14 15:50:00 (CST-6)
Location: SWEET BRIAR
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain accompanied the strong winds.

Thunderstorm Wind in MERCER, NORTH DAKOTA
From 21-JUL-14 16:05:00 to 21-JUL-14 16:10:00 (CST-6)
Location: STANTON
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BURLEIGH, NORTH DAKOTA
From 21-JUL-14 16:24:00 to 21-JUL-14 16:29:00 (CST-6)
Location: FT LINCOLN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Small hail accompanied the strong winds.

Thunderstorm Wind in FOSTER, NORTH DAKOTA
From 21-JUL-14 18:22:00 to 21-JUL-14 18:27:00 (CST-6)
Location: CARRINGTON
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BURLEIGH, NORTH DAKOTA
From 21-JUL-14 16:42:00 to 21-JUL-14 16:45:00 (CST-6)
Location: WILTON
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain accompanied the strong winds.

Thunderstorm Wind in FOSTER, NORTH DAKOTA
From 21-JUL-14 18:27:00 to 21-JUL-14 18:33:00 (CST-6)
Location: CARRINGTON
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A barn roof was blown off.

Thunderstorm Wind in FOSTER, NORTH DAKOTA
From 21-JUL-14 18:42:00 to 21-JUL-14 18:49:00 (CST-6)
Location: MC HENRY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain accompanied the strong winds.

Thunderstorm Wind in EMMONS, NORTH DAKOTA
From 21-JUL-14 17:05:00 to 21-JUL-14 17:14:00 (CST-6)
Location: HAZELTON
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in STUTSMAN, NORTH DAKOTA
From 21-JUL-14 17:55:00 to 21-JUL-14 18:00:00 (CST-6)
Location: STREETER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain accompanied the strong winds.

Hail in BOWMAN, NORTH DAKOTA
From 21-JUL-14 11:10:00 to 21-JUL-14 11:15:00 (MST-7)
Location: BOWMAN ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in STARK, NORTH DAKOTA
From 21-JUL-14 13:07:00 to 21-JUL-14 13:12:00 (MST-7)
Location: (DIK)DICKINSON MUNI
Magnitude: 56.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree branches were broken.

Hail in BOWMAN, NORTH DAKOTA
From 21-JUL-14 12:18:00 to 21-JUL-14 12:23:00 (MST-7)
Location: SCRANTON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in HETTINGER, NORTH DAKOTA
From 21-JUL-14 12:40:00 to 21-JUL-14 12:45:00 (MST-7)
Location: NEW ENGLAND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 21-JUL-14 15:23:00 to 21-JUL-14 15:27:00 (CST-6)
Location: HEBRON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain accompanied the strong winds.

Hail in ADAMS, NORTH DAKOTA
From 21-JUL-14 14:00:00 to 21-JUL-14 14:10:00 (MST-7)
Location: HAYNES
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Most of the hail was quarter size, with a few up to the size of a baseball. Damage information was not available.

Hail in GRANT, NORTH DAKOTA
From 21-JUL-14 14:16:00 to 21-JUL-14 14:21:00 (MST-7)
Location: CARSON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was no information on damage.

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 21-JUL-14 15:08:00 to 21-JUL-14 15:13:00 (CST-6)
Location: GLEN ULLIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain accompanied the strong winds.

Thunderstorm Wind in WELLS, NORTH DAKOTA
From 21-JUL-14 17:50:00 to 21-JUL-14 18:00:00 (CST-6)
Location: HEATON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain accompanied the strong winds.

Thunderstorm Wind in OLIVER, NORTH DAKOTA
From 21-JUL-14 16:10:00 to 21-JUL-14 16:30:00 (CST-6)
Location: CENTER
Magnitude: 70.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees six inches in diameter were snapped in Center.  Power lines were also reported down from the falling trees.

Thunderstorm Wind in OLIVER, NORTH DAKOTA
From 21-JUL-14 16:27:00 to 21-JUL-14 16:32:00 (CST-6)
Location: PRICE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Heavy rain accompanied the strong winds.

Thunderstorm Wind in OLIVER, NORTH DAKOTA
From 21-JUL-14 16:50:00 to 21-JUL-14 17:00:00 (CST-6)
Location: PRICE
Magnitude: 61.00 EG
Property damage: 45.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were down in the town of Price.

Thunderstorm Wind in BURLEIGH, NORTH DAKOTA
From 21-JUL-14 17:05:00 to 21-JUL-14 17:10:00 (CST-6)
Location: DRISCOLL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain accompanied the strong winds.

Thunderstorm Wind in OLIVER, NORTH DAKOTA
From 21-JUL-14 16:40:00 to 21-JUL-14 16:45:00 (CST-6)
Location: SANGER
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees twelve inches in diameter were snapped by the strong winds.

Thunderstorm Wind in KIDDER, NORTH DAKOTA
From 21-JUL-14 17:23:00 to 21-JUL-14 17:28:00 (CST-6)
Location: DAWSON
Magnitude: 70.00 EG
Property damage: 175.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Numerous very large trees were down around Lake Isabel, and a pontoon was flipped over. In one case a tree fell onto a lake home and crashed through the roof.

Thunderstorm Wind in OLIVER, NORTH DAKOTA
From 21-JUL-14 16:03:00 to 21-JUL-14 16:13:00 (CST-6)
Location: CENTER
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in FOSTER, NORTH DAKOTA
From 21-JUL-14 18:20:00 to 21-JUL-14 18:30:00 (CST-6)
Location: GRACE CITY
Magnitude: 70.00 EG
Property damage: 500.00K
Crop damage: 100.00K
Reported by: NWS Storm Survey

Structural, tree, and crop damage occurred in and around Grace City.

Hail in SIOUX, NORTH DAKOTA
From 21-JUL-14 15:08:00 to 21-JUL-14 15:13:00 (MST-7)
Location: SELFRIDGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter