A shortwave trough approached the area and interacted with a surface boundary which led to thunderstorm development during the late evening and overnight hours. Ample deep layer shear and enhanced instability were present. Storms initiated over western North Dakota, then gradually spread eastward overnight. Hail size remained on the low end of severe criteria, with multiple reports of one inch diameter hail. The strongest wind  occurred in Wells County, where 80 mph wind gusts damaged a farmstead. Also, heavy rains occurred over portions of Emmons County, producing flash flooding in the Westfield and Linton areas.

Thunderstorm Wind in BOWMAN, NORTH DAKOTA
From 03-JUL-18 20:00:00 to 03-JUL-18 20:03:00 (MST-7)
Location: HALEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement estimated thunderstorm wind gusts of 60 mph.

Thunderstorm Wind in MCKENZIE, NORTH DAKOTA
From 03-JUL-18 21:00:00 to 03-JUL-18 21:03:00 (MST-7)
Location: FAIRVIEW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public estimated thunderstorm wind gusts of 60 mph.

Hail in GRANT, NORTH DAKOTA
From 03-JUL-18 21:04:00 to 03-JUL-18 21:06:00 (MST-7)
Location: HEIL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SIOUX, NORTH DAKOTA
From 03-JUL-18 22:17:00 to 03-JUL-18 22:20:00 (MST-7)
Location: SELFRIDGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in SIOUX, NORTH DAKOTA
From 03-JUL-18 22:25:00 to 03-JUL-18 22:28:00 (MST-7)
Location: SELFRIDGE
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 03-JUL-18 22:50:00 to 03-JUL-18 22:53:00 (CST-6)
Location: SWEET BRIAR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported thunderstorm wind gusts of 60 mph.

Thunderstorm Wind in BURLEIGH, NORTH DAKOTA
From 03-JUL-18 23:00:00 to 03-JUL-18 23:02:00 (CST-6)
Location: WILTON
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MORTON, NORTH DAKOTA
From 03-JUL-18 23:04:00 to 03-JUL-18 23:08:00 (CST-6)
Location: MANDAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BURLEIGH, NORTH DAKOTA
From 03-JUL-18 23:10:00 to 03-JUL-18 23:13:00 (CST-6)
Location: BISMARCK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in BURLEIGH, NORTH DAKOTA
From 03-JUL-18 23:12:00 to 03-JUL-18 23:15:00 (CST-6)
Location: BISMARCK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BURLEIGH, NORTH DAKOTA
From 03-JUL-18 23:14:00 to 03-JUL-18 23:18:00 (CST-6)
Location: BISMARCK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCINTOSH, NORTH DAKOTA
From 04-JUL-18 00:40:00 to 04-JUL-18 00:43:00 (CST-6)
Location: VENTURA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MCINTOSH, NORTH DAKOTA
From 04-JUL-18 01:42:00 to 04-JUL-18 01:44:00 (CST-6)
Location: ZEELAND
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in MCLEAN, NORTH DAKOTA
From 03-JUL-18 23:07:00 to 03-JUL-18 23:14:00 (CST-6)
Location: WILTON
Magnitude: 65.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

Large trees were uprooted in the city of Wilton.

Lightning in LOGAN, NORTH DAKOTA
From 04-JUL-18 00:30:00 to 04-JUL-18 00:31:00 (CST-6)
Location: NAPOLEON
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Lightning struck a house and started a fire.

Thunderstorm Wind in WELLS, NORTH DAKOTA
From 04-JUL-18 00:35:00 to 04-JUL-18 00:43:00 (CST-6)
Location: HARVEY
Magnitude: 70.00 EG
Property damage: 60.00K
Crop damage: 0.00K
Reported by: Public

A well constructed wooden barn that was recently built was destroyed. Other farm buildings were damaged. A grain auger was toppled, and a large spruce tree was uprooted.

Flash Flood in EMMONS, NORTH DAKOTA
From 04-JUL-18 00:35:00 to 04-JUL-18 03:35:00 (CST-6)
Location: TEMVIK
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to four inches of rain resulted in flash flooding over portions of southern and central Emmons County. In the city of Linton, major street flooding occurred and was reported by law enforcement.