Strong shear with moderate instability developed over the region through the day of September 3. A surface low was over the western Dakotas ahead of an approaching cold front. A warm front was located near the North and South Dakota border in the afternoon. Severe storms developed over western North Dakota in the late afternoon as the cold front approached, and progressed east into the evening. The storms moved into central North Dakota late in the evening into the early morning of September 4.

Hail in OLIVER, NORTH DAKOTA
From 04-SEP-14 00:00:00 to 04-SEP-14 00:03:00 (CST-6)
Location: CENTER
Magnitude: 2.75 
Property damage: 200.00K
Crop damage: 100.00K
Reported by: Public

There was damage to buildings and the hail stripped leaves from trees and broke branches. Hail ranged from quarter to baseball size.

Hail in FOSTER, NORTH DAKOTA
From 04-SEP-14 01:00:00 to 04-SEP-14 01:03:00 (CST-6)
Location: CARRINGTON
Magnitude: 1.50 
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Public

Vehicle damage occurred in Carrington.

Hail in MERCER, NORTH DAKOTA
From 03-SEP-14 23:42:00 to 03-SEP-14 23:52:00 (CST-6)
Location: HAZEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OLIVER, NORTH DAKOTA
From 03-SEP-14 23:55:00 to 04-SEP-14 00:03:00 (CST-6)
Location: CENTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WELLS, NORTH DAKOTA
From 04-SEP-14 00:00:00 to 04-SEP-14 00:03:00 (CST-6)
Location: HURDSFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCLEAN, NORTH DAKOTA
From 04-SEP-14 00:45:00 to 04-SEP-14 00:49:00 (CST-6)
Location: WILTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BURLEIGH, NORTH DAKOTA
From 04-SEP-14 01:05:00 to 04-SEP-14 01:08:00 (CST-6)
Location: BALDWIN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FOSTER, NORTH DAKOTA
From 04-SEP-14 01:11:00 to 04-SEP-14 01:16:00 (CST-6)
Location: CARRINGTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BURLEIGH, NORTH DAKOTA
From 04-SEP-14 01:15:00 to 04-SEP-14 01:17:00 (CST-6)
Location: REGAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BURLEIGH, NORTH DAKOTA
From 04-SEP-14 01:20:00 to 04-SEP-14 01:23:00 (CST-6)
Location: REGAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in FOSTER, NORTH DAKOTA
From 04-SEP-14 01:24:00 to 04-SEP-14 01:26:00 (CST-6)
Location: CARRINGTON ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in KIDDER, NORTH DAKOTA
From 04-SEP-14 02:00:00 to 04-SEP-14 02:05:00 (CST-6)
Location: STEELE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The wind speed was estimated by a trained spotter.  Sustained winds of 50 mph were also reported.

Hail in KIDDER, NORTH DAKOTA
From 04-SEP-14 02:00:00 to 04-SEP-14 02:05:00 (CST-6)
Location: STEELE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCLEAN, NORTH DAKOTA
From 04-SEP-14 02:10:00 to 04-SEP-14 02:12:00 (CST-6)
Location: WILTON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BILLINGS, NORTH DAKOTA
From 03-SEP-14 19:25:00 to 03-SEP-14 19:28:00 (MST-7)
Location: FAIRFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCKENZIE, NORTH DAKOTA
From 03-SEP-14 19:40:00 to 03-SEP-14 19:43:00 (MST-7)
Location: GRASSY BUTTE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in DUNN, NORTH DAKOTA
From 03-SEP-14 19:15:00 to 03-SEP-14 19:20:00 (MST-7)
Location: HALLIDAY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCKENZIE, NORTH DAKOTA
From 03-SEP-14 19:40:00 to 03-SEP-14 19:42:00 (MST-7)
Location: GRASSY BUTTE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WILLIAMS, NORTH DAKOTA
From 03-SEP-14 21:15:00 to 03-SEP-14 21:20:00 (CST-6)
Location: EPPING
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCLEAN, NORTH DAKOTA
From 03-SEP-14 22:18:00 to 03-SEP-14 22:21:00 (CST-6)
Location: HAYNES
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCLEAN, NORTH DAKOTA
From 03-SEP-14 22:34:00 to 03-SEP-14 22:37:00 (CST-6)
Location: COLEHARBOR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DUNN, NORTH DAKOTA
From 03-SEP-14 21:45:00 to 03-SEP-14 21:47:00 (MST-7)
Location: MARSHALL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Funnel Cloud in MOUNTRAIL, NORTH DAKOTA
From 03-SEP-14 18:23:00 to 03-SEP-14 18:24:00 (CST-6)
Location: BLAISDELL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The location of the funnel cloud was estimated based on radar. The trained spotter was located in Stanley and reported the funnel to be an estimated 15 to 20 miles to their northeast.

Funnel Cloud in WILLIAMS, NORTH DAKOTA
From 03-SEP-14 19:30:00 to 03-SEP-14 19:33:00 (CST-6)
Location: WILLISTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MCKENZIE, NORTH DAKOTA
From 03-SEP-14 19:00:00 to 03-SEP-14 19:05:00 (MST-7)
Location: CHARLSON
Magnitude: 61.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Three recreational vehicles in Tobacco Garden Bay sustained significant damage, with one being toppled. No injuries were reported. It was originally speculated that the damage was caused by a tornado. Local emergency management conducted a survey and determined the damage was caused by strong straight line winds.

Thunderstorm Wind in WILLIAMS, NORTH DAKOTA
From 03-SEP-14 19:30:00 to 03-SEP-14 19:40:00 (CST-6)
Location: WILLISTON
Magnitude: 70.00 EG
Property damage: 1.00M
Crop damage: 500.00K
Reported by: NWS Storm Survey

Analysis of damage photos indicated that the peak wind was around 80 mph. The Williston Airport ASOS measured 71 mph at 8:33 PM CDT, but the worst damage was in other parts of Williston. Large trees were snapped and uprooted, fences were destroyed, and vehicles were destroyed by falling trees. It was estimated that the high winds lasted for about 10 minutes. Half dollar sized hail was also reported at this time.

Hail in WILLIAMS, NORTH DAKOTA
From 03-SEP-14 19:30:00 to 03-SEP-14 19:35:00 (CST-6)
Location: WILLISTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail was accompanied by severe thunderstorm winds around 80 mph. Damage estimates are noted in the thunderstorm wind storm data entry from 8:30 to 8:40 PM CDT. Half-dollar and quarter sized hail were also reported at the same time in Williston by a co-op observer and by law enforcement respectively.

Hail in BILLINGS, NORTH DAKOTA
From 03-SEP-14 19:35:00 to 03-SEP-14 19:39:00 (MST-7)
Location: FAIRFIELD
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There were no reports of damage.

Thunderstorm Wind in DUNN, NORTH DAKOTA
From 03-SEP-14 20:10:00 to 03-SEP-14 20:15:00 (MST-7)
Location: DUNN CENTER
Magnitude: 74.00 EG
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Minor injuries occurred to a 9 year old female that was inside a 5th wheel trailer-camper that tipped over. A horse trailer nearby also tipped over. Farm outbuildings and fences were damaged and trees were snapped. There was speculation that the damage could have been caused by a tornado, but determination from photo evidence was that this damage was caused by very high straight line thunderstorm winds.

Hail in BILLINGS, NORTH DAKOTA
From 03-SEP-14 20:40:00 to 03-SEP-14 20:43:00 (MST-7)
Location: FAIRFIELD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There were no reports of damage.

Hail in MCLEAN, NORTH DAKOTA
From 03-SEP-14 21:40:00 to 03-SEP-14 21:42:00 (CST-6)
Location: ROSEGLEN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There were no reports of damage.

Thunderstorm Wind in MCLEAN, NORTH DAKOTA
From 03-SEP-14 22:18:00 to 03-SEP-14 22:21:00 (CST-6)
Location: GARRISON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated by the public, and then relayed to the National Weather Service by a member of the broadcast media.

Hail in OLIVER, NORTH DAKOTA
From 03-SEP-14 23:45:00 to 03-SEP-14 23:51:00 (CST-6)
Location: HANNOVER
Magnitude: 1.75 
Property damage: 60.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Windows were broken out of the west side of a home.

Hail in DUNN, NORTH DAKOTA
From 03-SEP-14 21:09:00 to 03-SEP-14 21:13:00 (MST-7)
Location: MANNING
Magnitude: 2.75 
Property damage: 2.00M
Crop damage: 250.00K
Reported by: Emergency Manager

There was very significant damage to buildings and automobiles including at a car dealership.

Hail in WELLS, NORTH DAKOTA
From 04-SEP-14 00:13:00 to 04-SEP-14 00:16:00 (CST-6)
Location: CHASELEY
Magnitude: 1.75 
Reported by: Public

Hail in MOUNTRAIL, NORTH DAKOTA
From 03-SEP-14 17:20:00 to 03-SEP-14 17:27:00 (CST-6)
Location: WHITE EARTH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MOUNTRAIL, NORTH DAKOTA
From 03-SEP-14 18:15:00 to 03-SEP-14 18:17:00 (CST-6)
Location: BLAISDELL
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WARD, NORTH DAKOTA
From 03-SEP-14 18:32:00 to 03-SEP-14 18:33:00 (CST-6)
Location: CARPIO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WILLIAMS, NORTH DAKOTA
From 03-SEP-14 19:30:00 to 03-SEP-14 19:32:00 (CST-6)
Location: (ISN)SLOULIN FLD WIL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DUNN, NORTH DAKOTA
From 03-SEP-14 20:06:00 to 03-SEP-14 20:10:00 (MST-7)
Location: KILLDEER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in WILLIAMS, NORTH DAKOTA
From 03-SEP-14 20:15:00 to 03-SEP-14 20:20:00 (CST-6)
Location: WHEELOCK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MOUNTRAIL, NORTH DAKOTA
From 03-SEP-14 20:43:00 to 03-SEP-14 20:45:00 (CST-6)
Location: NEW TOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MERCER, NORTH DAKOTA
From 03-SEP-14 23:30:00 to 03-SEP-14 23:33:00 (CST-6)
Location: BEULAH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Wind gust speed was estimated by a storm chaser.

Hail in WILLIAMS, NORTH DAKOTA
From 03-SEP-14 16:41:00 to 03-SEP-14 16:43:00 (CST-6)
Location: ALAMO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BILLINGS, NORTH DAKOTA
From 03-SEP-14 19:40:00 to 03-SEP-14 19:43:00 (MST-7)
Location: FAIRFIELD
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

There were no reports of damage.