During the day of June 9th, temperatures over eastern North Dakota and the northwest quarter of Minnesota topped out in the upper 70s along the Canadian border to lower 90s along the North Dakota/South Dakota border. Mid level temperatures were very warm over the central Dakotas, helping to suppress convective development until early evening. By that point, thunderstorms broke out over southern Manitoba down through central North Dakota, mainly along a cold front. These storms tracked east-southeast, mainly covering the Devils Lake region, down through the central Red River Valley, and into the Mahnomen to Hubbard county corridor. A mix of tornadoes, hail, and strong winds were reported.

Thunderstorm Wind in CAVALIER, NORTH DAKOTA
From 09-JUN-17 17:37:00 to 09-JUN-17 17:37:00 (CST-6)
Location: LANGDON
Magnitude: 57.00 MG
Reported by: Mesonet

The wind gust was measured by a NDAWN mesonet sensor east of town.

Hail in CAVALIER, NORTH DAKOTA
From 09-JUN-17 17:52:00 to 09-JUN-17 17:52:00 (CST-6)
Location: OLGA
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in BENSON, NORTH DAKOTA
From 09-JUN-17 18:19:00 to 09-JUN-17 18:19:00 (CST-6)
Location: HARLOW
Magnitude: 103.00 MG
Reported by: Storm Chaser

The gust was measured by mobile mesonet equipment.

Thunderstorm Wind in PEMBINA, NORTH DAKOTA
From 09-JUN-17 18:40:00 to 09-JUN-17 18:40:00 (CST-6)
Location: ST THOMAS
Magnitude: 56.00 MG
Reported by: Mesonet

The wind gust was measured at an NDAWN station.

Thunderstorm Wind in PEMBINA, NORTH DAKOTA
From 09-JUN-17 18:45:00 to 09-JUN-17 18:45:00 (CST-6)
Location: ST THOMAS
Magnitude: 61.00 EG
Reported by: Trained Spotter

The strong winds were accompanied by very heavy rain and dime to nickel sized hail.

Hail in PEMBINA, NORTH DAKOTA
From 09-JUN-17 18:50:00 to 09-JUN-17 18:50:00 (CST-6)
Location: ST THOMAS
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in RAMSEY, NORTH DAKOTA
From 09-JUN-17 18:50:00 to 09-JUN-17 18:50:00 (CST-6)
Location: PENN
Magnitude: 0.88 
Reported by: Trained Spotter

Thunderstorm Wind in WALSH, NORTH DAKOTA
From 09-JUN-17 19:00:00 to 09-JUN-17 19:00:00 (CST-6)
Location: CASHEL
Magnitude: 63.00 MG
Reported by: Mesonet

The wind gust was measured by a Davis personal weather station.

Thunderstorm Wind in WALSH, NORTH DAKOTA
From 09-JUN-17 19:10:00 to 09-JUN-17 19:10:00 (CST-6)
Location: OAKWOOD
Magnitude: 83.00 EG
Reported by: NWS Storm Survey

Numerous large poplar, ash, and cottonwood trees were snapped or blown down in shelterbelts and farmsteads across St. Andrews and northern Acton townships. Peak winds were estimated from 85 to 95 mph over a several mile wide path.

Hail in RAMSEY, NORTH DAKOTA
From 09-JUN-17 19:13:00 to 09-JUN-17 19:13:00 (CST-6)
Location: DEVILS LAKE
Magnitude: 0.75 
Reported by: State Official

Tornado in RAMSEY, NORTH DAKOTA
From 09-JUN-17 19:27:00 to 09-JUN-17 19:27:00 (CST-6)
Location: KEITH
Tornado F-scale: EF0
Reported by: State Official

A brief touchdown was noted by an observer near Vining Oil, looking to the north.

Thunderstorm Wind in RAMSEY, NORTH DAKOTA
From 09-JUN-17 19:28:00 to 09-JUN-17 19:28:00 (CST-6)
Location: DEVILS LAKE
Magnitude: 57.00 MG
Reported by: Mesonet

The wind gust was measured by a ND DOT RWIS station.

Thunderstorm Wind in RAMSEY, NORTH DAKOTA
From 09-JUN-17 19:31:00 to 09-JUN-17 19:31:00 (CST-6)
Location: CRARY
Magnitude: 51.00 MG
Reported by: Mesonet

The wind gust was measured by the Crary NDAWN station.

Hail in EDDY, NORTH DAKOTA
From 09-JUN-17 19:35:00 to 09-JUN-17 19:35:00 (CST-6)
Location: HAMAR
Magnitude: 1.50 
Reported by: Public

Hail in NELSON, NORTH DAKOTA
From 09-JUN-17 19:40:00 to 09-JUN-17 19:40:00 (CST-6)
Location: PELTO
Magnitude: 1.75 
Reported by: Public

Quarter to golf ball sized hail fell.

Hail in NELSON, NORTH DAKOTA
From 09-JUN-17 19:40:00 to 09-JUN-17 19:40:00 (CST-6)
Location: TOLNA
Magnitude: 1.00 
Reported by: Public

Dime to quarter sized hail covered the ground.

Thunderstorm Wind in BENSON, NORTH DAKOTA
From 09-JUN-17 19:50:00 to 09-JUN-17 19:50:00 (CST-6)
Location: TOKIO
Magnitude: 65.00 EG
Reported by: Public

A large tree was uprooted and numerous tree branches were blown down.

Funnel Cloud in CAVALIER, NORTH DAKOTA
From 09-JUN-17 16:45:00 to 09-JUN-17 16:45:00 (CST-6)
Location: SARLES WESTON ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A funnel cloud was observed just east of the Sarles Port of Entry, along the Canadian border.

Tornado in GRIGGS, NORTH DAKOTA
From 09-JUN-17 20:32:00 to 09-JUN-17 20:33:00 (CST-6)
Location: WALUM
Tornado F-scale: EF0
Reported by: Trained Spotter

A brief touchdown was reported southwest of Walum, by spotters northeast of Wimbledon and north of Dazey. A persistent wall cloud structure with funnel-like appendage was viewed for several minutes as it passed along the Barnes and Griggs county line. Though a brief dust swirl was detected, no significant damage was apparent. Peak winds were estimated at 70 mph.

Hail in GRIGGS, NORTH DAKOTA
From 09-JUN-17 20:34:00 to 09-JUN-17 20:49:00 (CST-6)
Location: COOPERSTOWN
Magnitude: 1.50 
Reported by: COOP Observer

Hail in GRIGGS, NORTH DAKOTA
From 09-JUN-17 20:35:00 to 09-JUN-17 20:35:00 (CST-6)
Location: HANNAFORD
Magnitude: 1.75 
Reported by: Public

Hail in BENSON, NORTH DAKOTA
From 09-JUN-17 17:01:00 to 09-JUN-17 17:01:00 (CST-6)
Location: ESMOND
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in PEMBINA, NORTH DAKOTA
From 09-JUN-17 18:02:00 to 09-JUN-17 18:02:00 (CST-6)
Location: CONCRETE
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in BARNES, NORTH DAKOTA
From 09-JUN-17 20:39:00 to 09-JUN-17 20:39:00 (CST-6)
Location: DAZEY
Magnitude: 52.00 EG
Reported by: Trained Spotter

Blowing dust was also reported in the thunderstorm outflow.

Hail in GRIGGS, NORTH DAKOTA
From 09-JUN-17 20:40:00 to 09-JUN-17 20:40:00 (CST-6)
Location: HANNAFORD
Magnitude: 1.00 
Reported by: Public

Hail in STEELE, NORTH DAKOTA
From 09-JUN-17 21:00:00 to 09-JUN-17 21:00:00 (CST-6)
Location: BLABON
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in STEELE, NORTH DAKOTA
From 09-JUN-17 20:54:00 to 09-JUN-17 20:54:00 (CST-6)
Location: LUVERNE
Magnitude: 65.00 EG
Reported by: Trained Spotter

A few 8 to 10 inch diameter ash trees were snapped at varying levels, from ground level to about 8 feet up.

Hail in BENSON, NORTH DAKOTA
From 09-JUN-17 17:10:00 to 09-JUN-17 17:10:00 (CST-6)
Location: BAKER
Magnitude: 1.00 
Reported by: Public

Hail in BARNES, NORTH DAKOTA
From 09-JUN-17 21:05:00 to 09-JUN-17 21:05:00 (CST-6)
Location: HASTINGS
Magnitude: 1.50 
Reported by: Public

Hail in BARNES, NORTH DAKOTA
From 09-JUN-17 21:35:00 to 09-JUN-17 21:35:00 (CST-6)
Location: KATHRYN
Magnitude: 1.25 
Reported by: Public

Quarter to half dollar sized hail fell along with very heavy rain.

Hail in CASS, NORTH DAKOTA
From 09-JUN-17 21:48:00 to 09-JUN-17 21:53:00 (CST-6)
Location: ELIZABETH
Magnitude: 1.00 
Reported by: Trained Spotter

Dime to quarter sized hail fell.

Hail in CASS, NORTH DAKOTA
From 09-JUN-17 22:10:00 to 09-JUN-17 22:10:00 (CST-6)
Location: GARDNER
Magnitude: 1.00 
Reported by: Public

Thunderstorm Wind in BENSON, NORTH DAKOTA
From 09-JUN-17 18:20:00 to 09-JUN-17 18:20:00 (CST-6)
Location: BAKER
Magnitude: 61.00 EG
Reported by: Storm Chaser

A large pine tree was blown down.

Thunderstorm Wind in PEMBINA, NORTH DAKOTA
From 09-JUN-17 18:24:00 to 09-JUN-17 18:24:00 (CST-6)
Location: GARDAR
Magnitude: 79.00 MG
Reported by: Mesonet

The wind gust was measured by a personal weather station.

Hail in CASS, NORTH DAKOTA
From 09-JUN-17 22:37:00 to 09-JUN-17 22:37:00 (CST-6)
Location: COTTER
Magnitude: 0.75 
Reported by: Public

Brief pea to dime sized hail fell.

Thunderstorm Wind in CAVALIER, NORTH DAKOTA
From 09-JUN-17 17:20:00 to 09-JUN-17 17:20:00 (CST-6)
Location: DRESDEN
Magnitude: 52.00 EG
Reported by: Trained Spotter

Numerous 4 to 8 inch diameter tree branches were blown down at a farmstead.

Tornado in BENSON, NORTH DAKOTA
From 09-JUN-17 18:34:00 to 09-JUN-17 18:37:00 (CST-6)
Location: BRINSMADE
Tornado F-scale: EF0
Reported by: Storm Chaser

This tornado tracked largely over open country for about 2 miles, causing no significant damage. The ground swirl of the tornado was videoed by storm chasers near the west bay of Devils Lake, though very dusty conditions made visual detection difficult. Peak winds were estimated at 80 mph.

Hail in BENSON, NORTH DAKOTA
From 09-JUN-17 18:35:00 to 09-JUN-17 18:35:00 (CST-6)
Location: LEEDS
Magnitude: 2.00 
Reported by: Storm Chaser

Hail in BENSON, NORTH DAKOTA
From 09-JUN-17 18:35:00 to 09-JUN-17 18:35:00 (CST-6)
Location: LEEDS
Magnitude: 0.88 
Reported by: Fire Department/Rescue

Pea to nickel sized hail covered the ground. A wall cloud was also visible to the south from this location around 730 pm CDT.

Tornado in CAVALIER, NORTH DAKOTA
From 09-JUN-17 17:09:00 to 09-JUN-17 17:12:00 (CST-6)
Location: WALES
Tornado F-scale: EF0
Crop damage: 10.00K
Reported by: Emergency Manager

A tornado engulfed in downburst winds and hail tracked near Wales, snapping numerous tree limbs in shelterbelts along its path. Nearby fields were stripped of crops by wind driven hail. Peak winds were estimated at 85 mph.

Tornado in CAVALIER, NORTH DAKOTA
From 09-JUN-17 17:45:00 to 09-JUN-17 18:11:00 (CST-6)
Location: EASBY
Tornado F-scale: EF2
Property damage: 1.50M
Crop damage: 2.00M
Reported by: NWS Storm Survey

This tornado was partially engulfed in downburst winds and hail along its nearly 20 mile path. Large wooden power poles were snapped, roofing was stripped off of homes, steel pole sheds were totally dismantled, numerous steel grain bins were crushed, and large metal segments were carried for a mile or more downwind. Bean and grain fields were completely stripped. Peak winds were estimated at 120 mph.

Tornado in CAVALIER, NORTH DAKOTA
From 09-JUN-17 17:27:00 to 09-JUN-17 17:29:00 (CST-6)
Location: LANGDON
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 5.00K
Reported by: NWS Storm Survey

A weak tornado blew the doors off a seed company elevator and spread door and roof panels around the grounds in a circular pattern. Further downstream, the tornado snapped 6 power poles along 96th avenue northeast, a quarter mile east of highway 1. Peak winds were estimated at 105 mph.

Tornado in BENSON, NORTH DAKOTA
From 09-JUN-17 18:08:00 to 09-JUN-17 18:20:00 (CST-6)
Location: KNOX
Tornado F-scale: EF2
Property damage: 200.00K
Crop damage: 10.00K
Reported by: NWS Storm Survey

This tornado and corresponding rear flank downdraft wind produced widespread dust, which greatly reduced the visibility. Numerous ash, poplar, cottonwood, and evergreen trees were snapped or uprooted in shelterbelts and groves along its path. Peak winds of 119 mph were measured by a mobile system.

Thunderstorm Wind in CAVALIER, NORTH DAKOTA
From 09-JUN-17 16:46:00 to 09-JUN-17 16:46:00 (CST-6)
Location: SARLES WESTON ARPT
Magnitude: 80.00 MG
Property damage: 100.00K
Crop damage: 500.00K
Reported by: Mesonet

The wind gust was measured by a sensor along the Canadian border. Nearby corn and small grain fields were stripped of their leaves by wind driven hail. Evergreen and poplar trees were uprooted and steel grain bins were damaged in various farmsteads across Byron Township.

Thunderstorm Wind in CAVALIER, NORTH DAKOTA
From 09-JUN-17 18:00:00 to 09-JUN-17 18:00:00 (CST-6)
Location: MILTON
Magnitude: 80.00 EG
Property damage: 500.00K
Crop damage: 3.00M
Reported by: NWS Storm Survey

Large portions of Alma and East Alma townships were stripped of small grain and bean crops by extreme downburst winds and wind driven hail.

Thunderstorm Wind in PEMBINA, NORTH DAKOTA
From 09-JUN-17 18:10:00 to 09-JUN-17 18:10:00 (CST-6)
Location: MOUNTAIN
Magnitude: 78.00 EG
Property damage: 500.00K
Crop damage: 100.00K
Reported by: Emergency Manager

Numerous large tree branches and limbs were broken down or snapped across much of Thingvalla Township. Sheet metal roofing and shingles were blown off buildings in various locations.

Thunderstorm Wind in STEELE, NORTH DAKOTA
From 09-JUN-17 21:15:00 to 09-JUN-17 21:15:00 (CST-6)
Location: COLGATE
Magnitude: 65.00 EG
Property damage: 10.00K
Reported by: Law Enforcement

A chicken coop was destroyed and two large evergreens were blown down.

Tornado in PEMBINA, NORTH DAKOTA
From 09-JUN-17 18:12:00 to 09-JUN-17 18:14:00 (CST-6)
Location: MOUNTAIN
Tornado F-scale: EF1
Property damage: 200.00K
Crop damage: 100.00K
Reported by: NWS Storm Survey

This tornado snapped trees in shelterbelts and demolished a pole shed at a farmstead. In addition, shingles and roofing materials were peeled from various buildings and a television antenna was bent over. Debris was spread downstream and over a wide arc to the north and northwest by the east-southeast moving storm. Peak winds were estimated at 110 mph.

Thunderstorm Wind in WALSH, NORTH DAKOTA
From 09-JUN-17 18:52:00 to 09-JUN-17 18:52:00 (CST-6)
Location: NASH
Magnitude: 61.00 EG
Property damage: 200.00K
Crop damage: 400.00K
Reported by: NWS Storm Survey

Extensive tree damage extended from eastern Farmington into Martin township. Numerous large poplar, ash, and cottonwoods were snapped in field and farm shelterbelts.

Tornado in EDDY, NORTH DAKOTA
From 09-JUN-17 19:29:00 to 09-JUN-17 19:33:00 (CST-6)
Location: HAMAR
Tornado F-scale: EF0
Property damage: 10.00K
Reported by: NWS Storm Survey

This weak tornado crossed the southern end of Lake Washington, where a condensation plume was observed. Large branches were broken off of trees on either side of the lake, otherwise no significant damage was noted. Peak winds were estimated at 85 mph.

Thunderstorm Wind in STEELE, NORTH DAKOTA
From 09-JUN-17 21:10:00 to 09-JUN-17 21:10:00 (CST-6)
Location: HOPE
Magnitude: 80.00 EG
Property damage: 40.00K
Reported by: Law Enforcement

A steel grain bin was blown off its foundation and tumbled for a quarter of a mile.

Hail in BENSON, NORTH DAKOTA
From 09-JUN-17 18:24:00 to 09-JUN-17 18:24:00 (CST-6)
Location: HARLOW
Magnitude: 1.25 
Reported by: Public

Thunderstorm Wind in BARNES, NORTH DAKOTA
From 09-JUN-17 21:15:00 to 09-JUN-17 21:15:00 (CST-6)
Location: KOLDOK
Magnitude: 65.00 EG
Property damage: 200.00K
Reported by: Law Enforcement

Multiple vehicles were blown off Interstate 94, which briefly closed.

Thunderstorm Wind in CAVALIER, NORTH DAKOTA
From 09-JUN-17 18:09:00 to 09-JUN-17 18:09:00 (CST-6)
Location: MILTON
Magnitude: 70.00 EG
Property damage: 25.00K
Reported by: Broadcast Media

Granite slabs at the veteran's memorial were blown over and shattered by the strong winds.