Late in the afternoon of the 10th, an area of weak surface low pressure was located over north central South Dakota. There were several boundaries in the vicinity, but these were also fairly weak. However, there was ample instability and upper support, which led to severe thunderstorms over portions of southeast North Dakota.

Tornado in SARGENT, NORTH DAKOTA
From 10-JUL-11 15:50:00 to 10-JUL-11 16:27:00 (CST-6)
Location: NICHOLSON
Tornado F-scale: EF2
Property damage: 800.00K
Crop damage: 2.00M
Reported by: NWS Storm Survey

This tornado was enshrouded in downburst winds and heavy rains, but was briefly visible to spotters near Cogswell. The tornado ripped out nearly seven miles of dual wooden high voltage power line along its track. Numerous trees and singular power poles were snapped and pole sheds and steel grain bins were destroyed at multiple locations. Peak winds were estimated at 120 mph.

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 10-JUL-11 15:49:00 to 10-JUL-11 15:49:00 (CST-6)
Location: STRAUBVILLE
Magnitude: 110.00 MG
Crop damage: 150.00K
Reported by: Mesonet

Peak winds of 121 to 127 mph were measured at a temporary wind energy tower site. A total of six sensors arrayed from 130 to 200 feet above ground level registered the peak winds and rapid turning of winds from southeast, through west to northwest. This was consistent with a downburst wind at that site as depicted on radar, along with a bookend vortex and developing tornado located just north of the site.

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 10-JUL-11 16:06:00 to 10-JUL-11 16:06:00 (CST-6)
Location: COGSWELL
Magnitude: 70.00 EG
Property damage: 200.00K
Crop damage: 200.00K
Reported by: Law Enforcement

Numerous large tree limbs were broken down around town. A center pivot irrigation system four miles west of town was flipped. Widespread wind damage was evident throughout Harlem and Sargent townships.

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 10-JUL-11 16:10:00 to 10-JUL-11 16:10:00 (CST-6)
Location: FORMAN
Magnitude: 70.00 EG
Property damage: 250.00K
Crop damage: 250.00K
Reported by: COOP Observer

Several houses lost shingles or had siding or roofing damages. Numerous large trees and tree limbs were broken down around town. Widespread wind damage was evident throughout Bowen and Forman townships.

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 10-JUL-11 16:10:00 to 10-JUL-11 16:10:00 (CST-6)
Location: HAVANA
Magnitude: 70.00 EG
Property damage: 20.00K
Crop damage: 100.00K
Reported by: COOP Observer

Tin roofing was blown off a machine shop and large tree limbs were broken down. Widespread wind damage was evident throughout Taylor Township.

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 10-JUL-11 16:15:00 to 10-JUL-11 16:15:00 (CST-6)
Location: HAVANA
Magnitude: 70.00 EG
Property damage: 50.00K
Crop damage: 200.00K
Reported by: COOP Observer

A roof was torn off a steel grain bin. Numerous large tree limbs were broken down. Widespread wind damage was evident throughout Weber and Rutland townships.

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 10-JUL-11 16:18:00 to 10-JUL-11 16:18:00 (CST-6)
Location: RUTLAND
Magnitude: 70.00 EG
Property damage: 250.00K
Crop damage: 1.00M
Reported by: NWS Storm Survey

Numerous tree limbs were broken down around town. Fields were flattened by wind or stripped bare by wind driven hail. Wind damage occurred throughout Rutland and Dunbar townships from the 80 mph gusts.

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 10-JUL-11 16:27:00 to 10-JUL-11 16:27:00 (CST-6)
Location: CAYUGA
Magnitude: 70.00 EG
Property damage: 150.00K
Crop damage: 500.00K
Reported by: Public

Numerous large tree limbs were broken down around town. Roofing materials were also torn off of buildings. Wind damage throughout Ransom and Kingston townships indicated widespread peak winds from 70 to 80 mph with episodes of wind driven hail.

Tornado in SARGENT, NORTH DAKOTA
From 10-JUL-11 16:21:00 to 10-JUL-11 16:28:00 (CST-6)
Location: MILNOR MUNI ARPT
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 50.00K
Reported by: NWS Storm Survey

This tornado was likely wrapped in heavy rains and downburst winds for much of its track. The tornado snapped or uprooted numerous elm and ash trees in farm shelterbelts and in the town of Delamere. Peak winds were estimated at 100 mph.

Tornado in RICHLAND, NORTH DAKOTA
From 10-JUL-11 16:53:00 to 10-JUL-11 16:59:00 (CST-6)
Location: STILES
Tornado F-scale: EF1
Property damage: 30.00K
Crop damage: 300.00K
Reported by: NWS Storm Survey

The tornado became enshrouded in heavy rains and downburst winds. Several trees were snapped or uprooted in farm shelterbelts. Peak winds were estimated at 95 mph.

Thunderstorm Wind in RICHLAND, NORTH DAKOTA
From 10-JUL-11 16:50:00 to 10-JUL-11 16:50:00 (CST-6)
Location: WYNDMERE
Magnitude: 50.00 MG
Property damage: 200.00K
Crop damage: 200.00K
Reported by: Mesonet

The wind gust was measured by a NDSU NDAWN mesonet site. Numerous large tree limbs were broken down around the town of Wyndmere along with four wooden power poles. Wind damage was widespread throughout Wyndmere and Danton townships suggestive of peak winds from 55 to 65 mph, with isolated peak winds to 80 mph.

Thunderstorm Wind in RICHLAND, NORTH DAKOTA
From 10-JUL-11 17:02:00 to 10-JUL-11 17:02:00 (CST-6)
Location: MOORETON
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 100.00K
Reported by: NWS Storm Survey

Numerous large tree limbs were broken down and some shingles were torn off homes in Mooreton. Widespread wind damage was evident throughout Barney and Mooreton townships.

Thunderstorm Wind in RICHLAND, NORTH DAKOTA
From 10-JUL-11 17:20:00 to 10-JUL-11 17:20:00 (CST-6)
Location: LA MARS
Magnitude: 70.00 EG
Property damage: 500.00K
Crop damage: 1.00M
Reported by: Public

Several grain bins were dented in and numerous large tree limbs were broken down at a farmstead. Numerous tree branches were broken down in shelterbelts throughout Devillo and Lemars townships. Some corn fields were flattened.

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 10-JUL-11 16:17:00 to 10-JUL-11 16:17:00 (CST-6)
Location: GWINNER ARPT
Magnitude: 61.00 EG
Reported by: Trained Spotter

Large tree branches were blown down.

Thunderstorm Wind in RICHLAND, NORTH DAKOTA
From 10-JUL-11 16:40:00 to 10-JUL-11 16:40:00 (CST-6)
Location: LIDGERWOOD
Magnitude: 61.00 EG
Reported by: COOP Observer

Several large tree branches and a few large tree limbs were broken down around Lidgerwood. Peak winds were estimated at 60 to 70 mph across Grant and Moran townships.

Funnel Cloud in RANSOM, NORTH DAKOTA
From 10-JUL-11 15:35:00 to 10-JUL-11 15:35:00 (CST-6)
Location: ELLIOTT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A brief funnel cloud was observed south of Elliott, before it became obscured by rain.

Thunderstorm Wind in RANSOM, NORTH DAKOTA
From 10-JUL-11 15:50:00 to 10-JUL-11 15:50:00 (CST-6)
Location: ELLIOTT
Magnitude: 50.00 EG
Reported by: Public

A few large tree branches were broken down around town.

Thunderstorm Wind in RANSOM, NORTH DAKOTA
From 10-JUL-11 16:30:00 to 10-JUL-11 16:30:00 (CST-6)
Location: MC LEOD
Magnitude: 60.00 EG
Reported by: NWS Storm Survey

Numerous large tree limbs were broken down in shelterbelts across southern Rosemeade Township.

Thunderstorm Wind in RICHLAND, NORTH DAKOTA
From 10-JUL-11 17:25:00 to 10-JUL-11 17:25:00 (CST-6)
Location: FAIRMOUNT
Magnitude: 55.00 EG
Reported by: NWS Storm Survey

Numerous large tree branches were broken down in Fairmount and in neighboring sections of Fairmount Township.

Thunderstorm Wind in RICHLAND, NORTH DAKOTA
From 10-JUL-11 17:05:00 to 10-JUL-11 17:05:00 (CST-6)
Location: MANTADOR
Magnitude: 61.00 EG
Reported by: Storm Chaser

Trees were blown down at a farmstead, including a tree leaning on a house. The surrounding shelterbelts did not have as much damage.

Funnel Cloud in SARGENT, NORTH DAKOTA
From 10-JUL-11 16:18:00 to 10-JUL-11 16:18:00 (CST-6)
Location: MILNOR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The funnel cloud location was approximated by a spotter who was located three miles east of Gwinner.