Severe thunderstorms developed in the late morning over the southern James River Valley where elevated convection developed north of a warm front supported by a low level jet. Additional thunderstorms developed later in the afternoon into the evening over western and south central North Dakota as a short wave rotating around a closed upper low over central Montana pushed into the Northern Plains.

Hail in MORTON, NORTH DAKOTA
From 10-AUG-16 20:42:00 to 10-AUG-16 20:46:00 (CST-6)
Location: MANDAN
Magnitude: 2.50 
Property damage: 150.00K
Crop damage: 100.00K
Reported by: Public

Hail in DICKEY, NORTH DAKOTA
From 10-AUG-16 11:40:00 to 10-AUG-16 11:44:00 (CST-6)
Location: FORBES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DICKEY, NORTH DAKOTA
From 10-AUG-16 11:54:00 to 10-AUG-16 11:58:00 (CST-6)
Location: ELLENDALE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in DICKEY, NORTH DAKOTA
From 10-AUG-16 12:00:00 to 10-AUG-16 12:03:00 (CST-6)
Location: ELLENDALE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCKENZIE, NORTH DAKOTA
From 10-AUG-16 15:00:00 to 10-AUG-16 15:07:00 (MST-7)
Location: GRASSY BUTTE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 15.00K
Reported by: Public

Hail in MCKENZIE, NORTH DAKOTA
From 10-AUG-16 15:25:00 to 10-AUG-16 15:28:00 (MST-7)
Location: WATFORD CITY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Hail in BILLINGS, NORTH DAKOTA
From 10-AUG-16 15:28:00 to 10-AUG-16 15:31:00 (MST-7)
Location: FAIRFIELD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Hail in DUNN, NORTH DAKOTA
From 10-AUG-16 16:08:00 to 10-AUG-16 16:11:00 (MST-7)
Location: KILLDEER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BILLINGS, NORTH DAKOTA
From 10-AUG-16 16:10:00 to 10-AUG-16 16:13:00 (MST-7)
Location: FAIRFIELD
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BILLINGS, NORTH DAKOTA
From 10-AUG-16 16:30:00 to 10-AUG-16 16:34:00 (MST-7)
Location: FAIRFIELD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BILLINGS, NORTH DAKOTA
From 10-AUG-16 17:26:00 to 10-AUG-16 17:31:00 (MST-7)
Location: FAIRFIELD
Magnitude: 2.50 
Property damage: 15.00K
Crop damage: 30.00K
Reported by: Public

Thunderstorm Wind in DUNN, NORTH DAKOTA
From 10-AUG-16 17:35:00 to 10-AUG-16 17:38:00 (MST-7)
Location: HALLIDAY
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in STARK, NORTH DAKOTA
From 10-AUG-16 17:49:00 to 10-AUG-16 17:53:00 (MST-7)
Location: RICHARDTON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in STARK, NORTH DAKOTA
From 10-AUG-16 18:15:00 to 10-AUG-16 18:25:00 (MST-7)
Location: RICHARDTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MORTON, NORTH DAKOTA
From 10-AUG-16 19:07:00 to 10-AUG-16 19:10:00 (CST-6)
Location: HEBRON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Funnel Cloud in MORTON, NORTH DAKOTA
From 10-AUG-16 19:07:00 to 10-AUG-16 19:10:00 (CST-6)
Location: HEBRON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MORTON, NORTH DAKOTA
From 10-AUG-16 19:22:00 to 10-AUG-16 19:26:00 (CST-6)
Location: HEBRON
Magnitude: 2.50 
Property damage: 50.00K
Crop damage: 150.00K
Reported by: Public

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 10-AUG-16 19:30:00 to 10-AUG-16 19:32:00 (CST-6)
Location: GLEN ULLIN
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 10-AUG-16 19:35:00 to 10-AUG-16 19:39:00 (CST-6)
Location: GLEN ULLIN
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A law enforcement officer estimated thunderstorm wind gusts of 75 mph.

Hail in MORTON, NORTH DAKOTA
From 10-AUG-16 19:46:00 to 10-AUG-16 19:50:00 (CST-6)
Location: GLEN ULLIN
Magnitude: 3.00 
Property damage: 50.00K
Crop damage: 50.00K
Reported by: Public

Hail in MORTON, NORTH DAKOTA
From 10-AUG-16 20:05:00 to 10-AUG-16 20:08:00 (CST-6)
Location: NEW SALEM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MORTON, NORTH DAKOTA
From 10-AUG-16 20:40:00 to 10-AUG-16 20:45:00 (CST-6)
Location: MANDAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MORTON, NORTH DAKOTA
From 10-AUG-16 20:51:00 to 10-AUG-16 20:55:00 (CST-6)
Location: MANDAN
Magnitude: 2.00 
Property damage: 250.00K
Crop damage: 25.00K
Reported by: Public

Hail in MORTON, NORTH DAKOTA
From 10-AUG-16 20:51:00 to 10-AUG-16 20:55:00 (CST-6)
Location: MANDAN
Magnitude: 1.75 
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Public

Hail in MORTON, NORTH DAKOTA
From 10-AUG-16 20:55:00 to 10-AUG-16 20:59:00 (CST-6)
Location: MANDAN
Magnitude: 2.00 
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DIVIDE, NORTH DAKOTA
From 10-AUG-16 22:50:00 to 10-AUG-16 22:54:00 (CST-6)
Location: ALKABO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in DICKEY, NORTH DAKOTA
From 10-AUG-16 12:45:00 to 10-AUG-16 16:45:00 (CST-6)
Location: FORBES
Flood cause: Heavy Rain
Property damage: 60.00K
Crop damage: 20.00K
Reported by: Emergency Manager

Dickey County Highway 2 was flooded in multiple locations between the communities of Forbes and Merricourt. Very heavy rain fell on locations that received up to three inches of rain the previous night. Multiple additional township roads also became flooded throughout Dickey County and some were washed out in places.

Flash Flood in BILLINGS, NORTH DAKOTA
From 10-AUG-16 15:28:00 to 10-AUG-16 16:28:00 (MST-7)
Location: FAIRFIELD
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Heavy rain over the area resulted in water covering Highway 85 in the vicinity of the North Unit of Theodore Roosevelt National Park. Repairs were needed to the roads shoulders.

Hail in STARK, NORTH DAKOTA
From 10-AUG-16 17:36:00 to 10-AUG-16 17:42:00 (MST-7)
Location: TAYLOR
Magnitude: 2.75 
Property damage: 125.00K
Crop damage: 150.00K
Reported by: COOP Observer

Large hail punched holes in a steel building, and multiple windows were shattered.  The roof of a house was damaged and a wheat field was destroyed.

Hail in STARK, NORTH DAKOTA
From 10-AUG-16 17:55:00 to 10-AUG-16 17:59:00 (MST-7)
Location: RICHARDTON
Magnitude: 3.00 
Property damage: 100.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Extensive property and crop damage were reported north of Richardton.  No exact details were provided.