A significant severe weather event evolved during the evening hours of Thursday, August 12th, and continued into the early morning hours of Friday, August 13th. Southwest flow aloft was in place across the Northern Plains region, ahead of an upper level trough over the Northern Rockies. A potent upper level impulse ejecting from the base of the trough provided the trigger for two areas of strong to severe convection. The first area was near a stationary boundary across southern North Dakota, where intense thunderstorm winds of 80 to near 100 mph were observed. The second area was ahead of a cold front over north central North Dakota, where an isolated tornadic supercell developed and spawned an EF3 tornado near Bowbells.
Well into this event, Severe Thunderstorm Watch number 605 was issued across southwest and south central North Dakota in anticipation of a Mesoscale Convective System over southwest North Dakota tracking eastward along the South Dakota border area.  By the time of the watch issuance, the tornadic supercell over north central North Dakota had dissipated.
Multiple severe thunderstorm and tornado warnings were issued. Several reports of large hail, numerous reports of strong thunderstorm winds, and one confirmed EF3 tornado was received during this episode.
The EF3 tornado tragically claimed one fatality.  An automobile traveling east on Highway 52 was picked up and carried several hundred yards before being thrown into a field. Another person in the car was injured. In addition, a farmstead sustained heavy damage from the tornado, with severe damage observed to the home and several outbuildings.

Hail in ADAMS, NORTH DAKOTA
From 12-AUG-10 19:28:00 to 12-AUG-10 19:36:00 (MST-7)
Location: REEDER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in STARK, NORTH DAKOTA
From 12-AUG-10 19:34:00 to 12-AUG-10 19:40:00 (MST-7)
Location: BELFIELD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ADAMS, NORTH DAKOTA
From 12-AUG-10 18:30:00 to 12-AUG-10 18:40:00 (MST-7)
Location: REEDER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in LA MOURE, NORTH DAKOTA
From 12-AUG-10 19:14:00 to 12-AUG-10 19:16:00 (CST-6)
Location: VERONA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BURKE, NORTH DAKOTA
From 12-AUG-10 20:31:00 to 12-AUG-10 20:37:00 (CST-6)
Location: BOWBELLS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in ADAMS, NORTH DAKOTA
From 12-AUG-10 20:14:00 to 12-AUG-10 20:22:00 (MST-7)
Location: HETTINGER
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in ADAMS, NORTH DAKOTA
From 12-AUG-10 19:59:00 to 12-AUG-10 20:14:00 (MST-7)
Location: HETTINGER
Magnitude: 81.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hail in STARK, NORTH DAKOTA
From 12-AUG-10 19:50:00 to 12-AUG-10 20:12:00 (MST-7)
Location: SOUTH HEART
Magnitude: 2.50 
Property damage: 200.00K
Crop damage: 200.00K
Reported by: Emergency Manager

The largest hailstone during this event was two and one half inches in diameter. The large hail damaged windows, siding, crops, and vehicles.

Hail in BURKE, NORTH DAKOTA
From 12-AUG-10 19:42:00 to 12-AUG-10 19:49:00 (CST-6)
Location: FLAXTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in EMMONS, NORTH DAKOTA
From 12-AUG-10 22:50:00 to 12-AUG-10 22:59:00 (CST-6)
Location: LINTON
Magnitude: 70.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Newspaper

Strong thunderstorm winds tore the roof off of a trailer home.

Thunderstorm Wind in HETTINGER, NORTH DAKOTA
From 12-AUG-10 20:35:00 to 12-AUG-10 20:45:00 (MST-7)
Location: MOTT
Magnitude: 80.00 EG
Property damage: 150.00K
Crop damage: 200.00K
Reported by: Emergency Manager

Damage was reported to trees and power lines. Damage was also reported to a grain bin and an elevator roof in the city of Mott.

Thunderstorm Wind in SIOUX, NORTH DAKOTA
From 12-AUG-10 21:23:00 to 12-AUG-10 21:33:00 (MST-7)
Location: SELFRIDGE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Estimated winds of 70 mph were reported.

Hail in ADAMS, NORTH DAKOTA
From 12-AUG-10 19:45:00 to 12-AUG-10 19:53:00 (MST-7)
Location: REEDER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ADAMS, NORTH DAKOTA
From 12-AUG-10 19:48:00 to 12-AUG-10 19:59:00 (MST-7)
Location: HETTINGER
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hail in RENVILLE, NORTH DAKOTA
From 12-AUG-10 22:22:00 to 12-AUG-10 22:27:00 (CST-6)
Location: TOLLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in HETTINGER, NORTH DAKOTA
From 12-AUG-10 20:35:00 to 12-AUG-10 20:45:00 (MST-7)
Location: REGENT
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Estimated winds of 80 mph were reported.

Tornado in WARD, NORTH DAKOTA
From 12-AUG-10 20:40:00 to 12-AUG-10 20:55:00 (CST-6)
Location: NIOBE
Tornado F-scale: EF3
Property damage: 500.00K
Crop damage: 100.00K
Reported by: NWS Storm Survey

This tornado crossed from Burke County into Ward County. Note that for roughly three miles in the vicinity of the Des Lacs River, U.S. Highway 52 runs right on the Burke and Ward County line. The tornado was right on the highway in this area. This was the location of the worst damage with this tornado. Farm property on the north side of the highway, Burke County, and on the south side of the highway, Ward County, was impacted. One fatality and one injury occurred here, in a single automobile travelling along the highway, on the county line. The vehicle came to rest in a field, nearly 200 yards off the highway, on the south side of the highway, on the east side of the river, in Ward County. See the EF3 tornado entry for Burke County from August 12.
This third tornado touched down just northeast of Bowbells, Burke County, and tracked east-southeast along U.S. Highway 52, and into Ward County where it dissipated. This EF3 tornado was spawned from the same supercell thunderstorm that earlier produced two brief and weak tornadoes in Burke County.
Meteorologists from the National Weather Service conducted a storm damage survey on Friday, August 13, 2010. Meteorologists walked through the area and spoke with numerous people affected, some of whom were eye witnesses to the event.
Significant damage occurred nearly six miles east of Bowbells, near the Des Lacs River, where U.S. Highway 52 is on the Burke and Ward County line. Three farms were impacted. The worst damage was on the Burke County side of the highway and west side of the river, where a farm home (DI 2, DOD 8) and six outbuildings were destroyed. Nineteen of 21 grain bins were also damaged or destroyed. In addition, a fifty foot air seeder connected to a cultivator, with a combined estimated weight near 60,000 pounds, was moved approximately 100 yards. Based on a lack of scratch marks in the ground it was determined that this equipment was picked up and carried through the air. A second farm, on the Ward County side of the highway, had trees in shelter belts snapped and uprooted and the chimney on the house damaged. A third house, this one on the east side of the river and the Ward County side of the highway, also had significant damage. Here, one camper was thrown into the river on the south side of the Highway 52 bridge that crosses the river, while another camper was thrown into the river and landed on the north side of the bridge, back into Burke County. The house had damage to siding and shingles.
Of all the damage surveyed the absolute worst corresponded to a high EF3 on the Enhanced Fujita Tornado Scale. From that it was determined that peak wind speeds in the tornado were on the order of 165 mph.
One fatality and one injury occurred in an automobile in this same immediate area. A car with two occupants travelling east along U.S. Highway 52 was picked up and carried over the Des Lacs River, and came to rest 200 yards off the highway, in a field east of the river, and on the Ward County side of the highway. The driver of the vehicle was injured and the passenger was killed.
See the other three tornado entries for Burke County from this event on August 12. This tornado crossed into Ward County from Burke.

Tornado in BURKE, NORTH DAKOTA
From 12-AUG-10 20:26:00 to 12-AUG-10 20:40:00 (CST-6)
Location: BOWBELLS
Tornado F-scale: EF3
Property damage: 700.00K
Crop damage: 150.00K
Reported by: NWS Storm Survey

This tornado crossed from Burke County into Ward County. Note that for roughly three miles in the vicinity of the Des Lacs River, U.S. Highway 52 runs right on the Burke and Ward County line. The tornado was right on the highway in this area. This was the location of the worst damage with this tornado. Farm property on the north side of the highway, Burke County, and on the south side of the highway, Ward County, was impacted. One fatality and one injury occurred here, in a single automobile travelling along the highway, on the county line. The vehicle came to rest in a field, nearly 200 yards off the highway, on the south side of the highway, on the east side of the river, in Ward County. See the EF3 tornado entry for Ward County from August 12.
This third tornado touched down just northeast of Bowbells, Burke County, and tracked east-southeast along U.S. Highway 52, and into Ward County where it dissipated. This EF3 tornado was spawned from the same supercell thunderstorm that earlier produced two brief and weak tornadoes in Burke County.
Meteorologists from the National Weather Service conducted a storm damage survey on Friday, August 13, 2010. Meteorologists walked through the area and spoke with numerous people affected, some of whom were eye witnesses to the event.
Significant damage occurred nearly six miles east of Bowbells, near the Des Lacs River, where U.S. Highway 52 is on the Burke and Ward County line. Three farms were impacted. The worst damage was on the Burke County side of the highway and west side of the river, where a farm home (DI 2, DOD 8) and six outbuildings were destroyed. Nineteen of 21 grain bins were also damaged or destroyed. In addition, a fifty foot air seeder connected to a cultivator, with a combined estimated weight near 60,000 pounds, was moved approximately 100 yards. Based on a lack of scratch marks in the ground it was determined that this equipment was picked up and carried through the air. A second farm, on the Ward County side of the highway, had trees in shelter belts snapped and uprooted and the chimney on the house damaged. A third house, this one on the east side of the river and the Ward County side of the highway, also had significant damage. Here, one camper was thrown into the river on the south side of the Highway 52 bridge that crosses the river, while another camper was thrown into the river and landed on the north side of the bridge, back into Burke County. The house had damage to siding and shingles.
Of all the damage surveyed the absolute worst corresponded to a high EF3 on the Enhanced Fujita Tornado Scale. From that it was determined that peak wind speeds in the tornado were on the order of 165 mph.
One fatality and one injury occurred in an automobile in this same immediate area. A car with two occupants travelling east along U.S. Highway 52 was picked up and carried over the Des Lacs River, and came to rest 200 yards off the highway, in a field east of the river, and on the Ward County side of the highway. The driver of the vehicle was injured and the passenger was killed.
See the other two tornado entries for Burke County, and the EF3 tornado entry for Ward County from August 12 as this tornado crossed into Ward County.

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 12-AUG-10 23:18:00 to 12-AUG-10 23:28:00 (CST-6)
Location: ST ANTHONY
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Tornado in BURKE, NORTH DAKOTA
From 12-AUG-10 20:00:00 to 12-AUG-10 20:01:00 (CST-6)
Location: BOWBELLS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado touched down in the open country west of Bowbells. No structures were impacted so no damage was done. This tornado was spawned from the same supercell thunderstorm that later produced another brief tornado in Burke County and a long tracked high end EF3 tornado from Burke into Ward County. See the other two tornado entries for Burke County and the tornado entry for Ward County from August 12.

Tornado in BURKE, NORTH DAKOTA
From 12-AUG-10 20:03:00 to 12-AUG-10 20:04:00 (CST-6)
Location: BOWBELLS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A second brief tornado touched down in the open country just west of the Bowbells airport. No structures were impacted so no damage was done. This tornado was spawned from the same supercell thunderstorm that earlier produced a brief tornado in Burke County, and later produced a long tracked high end EF3 tornado from Burke into Ward County. See the other two tornado entries for Burke County and the tornado entry for Ward County from August 12.