Somewhat unexpectedly, one very strong thunderstorm tracked across north central North Dakota into the northern Devils Lake region during the late afternoon of June 14th, dropping large hail and heavy rain. Several hours later, more thunderstorms across southern Manitoba moved back into the same area north of Devils Lake. These storms produced several tornadoes, strong winds, and large hail. Strong storms also fired up across southeast North Dakota around midnight, which tracked toward the Fargo-Moorhead area in the early morning hours of the June 15th.

Hail in TOWNER, NORTH DAKOTA
From 14-JUN-18 15:55:00 to 14-JUN-18 16:10:00 (CST-6)
Location: BISBEE LYSTER ARPT
Magnitude: 1.25 
Reported by: Public

Quarter to half dollar sized hail fell.

Hail in TOWNER, NORTH DAKOTA
From 14-JUN-18 16:10:00 to 14-JUN-18 16:25:00 (CST-6)
Location: BISBEE LYSTER ARPT
Magnitude: 1.25 
Reported by: Public

Quarter to half dollar sized hail fell.

Hail in TOWNER, NORTH DAKOTA
From 14-JUN-18 16:30:00 to 14-JUN-18 16:30:00 (CST-6)
Location: CROCUS
Magnitude: 1.75 
Reported by: Public

Pea to golf ball sized hail fell.

Hail in TOWNER, NORTH DAKOTA
From 14-JUN-18 16:45:00 to 14-JUN-18 16:45:00 (CST-6)
Location: EGELAND
Magnitude: 1.75 
Reported by: Public

Pea to marble sized hail fell for around 25 minutes prior to the golf ball sized hail.

Hail in CAVALIER, NORTH DAKOTA
From 14-JUN-18 16:55:00 to 14-JUN-18 16:55:00 (CST-6)
Location: CALIO
Magnitude: 1.50 
Reported by: Public

Hail in CAVALIER, NORTH DAKOTA
From 14-JUN-18 17:30:00 to 14-JUN-18 17:30:00 (CST-6)
Location: ALSEN
Magnitude: 2.00 
Reported by: Social Media

Hail in CAVALIER, NORTH DAKOTA
From 14-JUN-18 17:30:00 to 14-JUN-18 17:30:00 (CST-6)
Location: DRESDEN
Magnitude: 1.50 
Reported by: Trained Spotter

Hailstones ranged from 1 to 1.5 inches in size.

Tornado in TOWNER, NORTH DAKOTA
From 14-JUN-18 20:18:00 to 14-JUN-18 20:24:00 (CST-6)
Location: ARMOURDALE
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A partially rain wrapped tornado tracked intermittently for about three miles. At least one power pole was cracked and power lines were torn down in central Mountain View Township. Peak winds were estimated at 95 mph.

Thunderstorm Wind in TOWNER, NORTH DAKOTA
From 14-JUN-18 20:35:00 to 14-JUN-18 20:35:00 (CST-6)
Location: PASHA
Magnitude: 80.00 EG
Reported by: Public

Two hopper bottomed grain bins and a grain dryer were blown at a site just west of the lake. A 5000 bushel steel grain bin was also dented in near the roof line.

Thunderstorm Wind in TOWNER, NORTH DAKOTA
From 14-JUN-18 20:37:00 to 14-JUN-18 20:37:00 (CST-6)
Location: ROCKLAKE
Magnitude: 75.00 EG
Reported by: Public

Trees were blown down around town. Some steel siding was torn off the sides of a grain cleaning facility.

Tornado in TOWNER, NORTH DAKOTA
From 14-JUN-18 20:45:00 to 14-JUN-18 20:56:00 (CST-6)
Location: ROCKLAKE
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A partially rain wrapped tornado tracked eastward for about four miles across southern Virginia Township. The tornado picked up and tossed a hopper bottom grain bin about 40 yards to the southwest, blew down cattle fencing at a farmstead, and broke down numerous large tree branches along its path. Peak winds were estimated at 90 mph.

Thunderstorm Wind in TOWNER, NORTH DAKOTA
From 14-JUN-18 21:08:00 to 14-JUN-18 21:08:00 (CST-6)
Location: ARNDT
Magnitude: 50.00 EG
Reported by: NWS Storm Survey

A poplar tree was snapped in a shelterbelt.

Hail in TOWNER, NORTH DAKOTA
From 14-JUN-18 21:23:00 to 14-JUN-18 21:23:00 (CST-6)
Location: CONSIDINE
Magnitude: 1.75 
Reported by: Trained Spotter

Very heavy rain accompanied the large hail.

Tornado in CAVALIER, NORTH DAKOTA
From 14-JUN-18 21:24:00 to 14-JUN-18 21:33:00 (CST-6)
Location: CALIO
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A partially rain wrapped tornado tracked 3 to 4 miles, from the northwest corner of Calio into northeast Seivert Township. The tornado blew down several trees in Calio and tore some steel sheets off a shop roof. Peak winds were estimated at 95 mph.

Hail in TOWNER, NORTH DAKOTA
From 14-JUN-18 21:25:00 to 14-JUN-18 21:25:00 (CST-6)
Location: ZION
Magnitude: 1.75 
Reported by: Public

Hail in CAVALIER, NORTH DAKOTA
From 14-JUN-18 21:34:00 to 14-JUN-18 21:34:00 (CST-6)
Location: MUNICH
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in CAVALIER, NORTH DAKOTA
From 14-JUN-18 21:44:00 to 14-JUN-18 21:44:00 (CST-6)
Location: CALIO
Magnitude: 1.00 
Reported by: Public

Heavy rain occurred and several large tree branches were blown down.

Hail in CAVALIER, NORTH DAKOTA
From 14-JUN-18 21:45:00 to 14-JUN-18 21:45:00 (CST-6)
Location: CALIO
Magnitude: 1.00 
Reported by: Public

Hail in RAMSEY, NORTH DAKOTA
From 14-JUN-18 22:25:00 to 14-JUN-18 22:27:00 (CST-6)
Location: HAMPDEN
Magnitude: 1.00 
Reported by: Public

A quick half inch of rain also fell.

Thunderstorm Wind in BENSON, NORTH DAKOTA
From 14-JUN-18 22:30:00 to 14-JUN-18 22:30:00 (CST-6)
Location: HARLOW
Magnitude: 50.00 EG
Reported by: Public

Several large tree branches were blown down in shelterbelts in southern Butte Valley Township.

Hail in BENSON, NORTH DAKOTA
From 14-JUN-18 22:45:00 to 14-JUN-18 22:45:00 (CST-6)
Location: TILDEN
Magnitude: 1.50 
Reported by: Public

Some crop damage was noted across northeast Riggin Township.

Hail in RAMSEY, NORTH DAKOTA
From 14-JUN-18 23:10:00 to 14-JUN-18 23:10:00 (CST-6)
Location: PENN
Magnitude: 0.88 
Reported by: Public

About 0.70 inches of rain also fell.

Hail in RAMSEY, NORTH DAKOTA
From 14-JUN-18 23:30:00 to 14-JUN-18 23:30:00 (CST-6)
Location: SWEETWATER
Magnitude: 1.00 
Reported by: Public

Pea to quarter sized hail fell.

Hail in CASS, NORTH DAKOTA
From 14-JUN-18 23:40:00 to 14-JUN-18 23:40:00 (CST-6)
Location: ELIZABETH
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in CASS, NORTH DAKOTA
From 15-JUN-18 01:00:00 to 15-JUN-18 01:00:00 (CST-6)
Location: HORACE
Magnitude: 1.50 
Reported by: Social Media

Thunderstorm Wind in CASS, NORTH DAKOTA
From 15-JUN-18 01:00:00 to 15-JUN-18 01:00:00 (CST-6)
Location: FARGO
Magnitude: 50.00 EG
Reported by: Public

Large branches were blown down.

Hail in CASS, NORTH DAKOTA
From 15-JUN-18 01:07:00 to 15-JUN-18 01:17:00 (CST-6)
Location: FARGO
Magnitude: 1.00 
Reported by: Broadcast Media

The hail was mostly pea to dime size.

Hail in CASS, NORTH DAKOTA
From 15-JUN-18 01:10:00 to 15-JUN-18 01:10:00 (CST-6)
Location: COTTER
Magnitude: 1.00 
Reported by: Trained Spotter