By 4 pm on May 15th, temperatures across eastern North Dakota and the northwest quarter of Minnesota had risen to the 70s and low 80s. A weak area of surface low pressure was located near Minot, with a cold front extending south-southwest toward Hettinger. Surface dew points were quite dry ahead of the cold front, generally ranging from the mid 20s to mid 30s. However, along the cold front, they did rise into the 40s to low 50s. A broken line of thunderstorms formed along the front and tracked to the east-southeast through the evening. These storms produced numerous reports of large hail and damaging winds. The last warning expired at midnight.

Funnel Cloud in RAMSEY, NORTH DAKOTA
From 15-MAY-19 17:45:00 to 15-MAY-19 17:45:00 (CST-6)
Location: EDMORE
Reported by: State Official

A persistent funnel cloud was reported and photographed by multiple sources. The funnel was located west of Edmore and south of highway 17. A brief non-damaging touchdown was possible.

Hail in RAMSEY, NORTH DAKOTA
From 15-MAY-19 17:54:00 to 15-MAY-19 17:54:00 (CST-6)
Location: EDMORE
Magnitude: 1.00 
Reported by: Trained Spotter

A few dime to quarter sized hail fell across highway 1.

Hail in EDDY, NORTH DAKOTA
From 15-MAY-19 17:55:00 to 15-MAY-19 17:55:00 (CST-6)
Location: NEW ROCKFORD ARPT
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in NELSON, NORTH DAKOTA
From 15-MAY-19 18:08:00 to 15-MAY-19 18:08:00 (CST-6)
Location: PELTO
Magnitude: 1.00 
Reported by: Social Media

Dime to quarter sized hail fell.

Hail in EDDY, NORTH DAKOTA
From 15-MAY-19 18:12:00 to 15-MAY-19 18:12:00 (CST-6)
Location: BRANTFORD
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in EDDY, NORTH DAKOTA
From 15-MAY-19 18:28:00 to 15-MAY-19 18:28:00 (CST-6)
Location: HAMAR
Magnitude: 63.00 MG
Reported by: Mesonet

Sustained winds of 45 mph with a gust to 72 mph were reported by the McHenry NDAWN mesonet station.

Thunderstorm Wind in GRIGGS, NORTH DAKOTA
From 15-MAY-19 18:45:00 to 15-MAY-19 18:45:00 (CST-6)
Location: BINFORD
Magnitude: 56.00 EG
Reported by: Public

Wind speeds estimated at 60 to 70 mph blew down large tree branches. The strong winds continued across central Willow Township.

Thunderstorm Wind in GRIGGS, NORTH DAKOTA
From 15-MAY-19 19:12:00 to 15-MAY-19 19:12:00 (CST-6)
Location: JESSIE
Magnitude: 56.00 EG
Reported by: Public

Large branches were blown down in a farm yard and a shed door was torn off.

Hail in GRAND FORKS, NORTH DAKOTA
From 15-MAY-19 19:20:00 to 15-MAY-19 19:20:00 (CST-6)
Location: MEKINOCK
Magnitude: 1.50 
Reported by: Social Media

Thunderstorm Wind in STEELE, NORTH DAKOTA
From 15-MAY-19 19:21:00 to 15-MAY-19 19:21:00 (CST-6)
Location: FINLEY
Magnitude: 56.00 EG
Reported by: Public

Large tree branches and a couple of trees were snapped in a farm shelterbelt.

Hail in GRAND FORKS, NORTH DAKOTA
From 15-MAY-19 19:30:00 to 15-MAY-19 19:30:00 (CST-6)
Location: (GFK)GRAND FORKS INT
Magnitude: 1.25 
Reported by: Public

Thunderstorm Wind in STEELE, NORTH DAKOTA
From 15-MAY-19 19:36:00 to 15-MAY-19 19:36:00 (CST-6)
Location: SHERBROOKE
Magnitude: 52.00 EG
Reported by: NWS Storm Survey

Large tree branches were blown down in shelterbelts across southern Newburgh Township.

Thunderstorm Wind in GRAND FORKS, NORTH DAKOTA
From 15-MAY-19 19:41:00 to 15-MAY-19 19:41:00 (CST-6)
Location: BOLACK
Magnitude: 56.00 EG
Reported by: NWS Storm Survey

Sections of wooden fencing and the company mailbox were blown down at an industrial site.

Thunderstorm Wind in TRAILL, NORTH DAKOTA
From 15-MAY-19 19:42:00 to 15-MAY-19 19:42:00 (CST-6)
Location: HATTON
Magnitude: 56.00 EG
Reported by: NWS Storm Survey

Large branches were blown down and one large spruce tree was snapped in shelterbelts across southern Garfield Township.

Thunderstorm Wind in BARNES, NORTH DAKOTA
From 15-MAY-19 19:52:00 to 15-MAY-19 19:52:00 (CST-6)
Location: SANBORN
Magnitude: 52.00 EG
Reported by: Amateur Radio

The wind was accompanied by half inch hail.

Thunderstorm Wind in TRAILL, NORTH DAKOTA
From 15-MAY-19 19:55:00 to 15-MAY-19 19:55:00 (CST-6)
Location: BUXTON
Magnitude: 52.00 EG
Reported by: NWS Storm Survey

A few large trees were blown down in shelterbelts across southern Buxton Township.

Hail in BARNES, NORTH DAKOTA
From 15-MAY-19 20:13:00 to 15-MAY-19 20:13:00 (CST-6)
Location: BEREA
Magnitude: 1.50 
Reported by: Social Media

Hail in BARNES, NORTH DAKOTA
From 15-MAY-19 20:14:00 to 15-MAY-19 20:14:00 (CST-6)
Location: VALLEY CITY
Magnitude: 1.00 
Reported by: Public

Hail in BARNES, NORTH DAKOTA
From 15-MAY-19 20:43:00 to 15-MAY-19 20:43:00 (CST-6)
Location: FINGAL
Magnitude: 1.75 
Reported by: Broadcast Media

Hail in RICHLAND, NORTH DAKOTA
From 15-MAY-19 22:27:00 to 15-MAY-19 22:27:00 (CST-6)
Location: LIDGERWOOD
Magnitude: 1.00 
Reported by: Storm Chaser

Nickel to quarter sized hail fell.

Thunderstorm Wind in RICHLAND, NORTH DAKOTA
From 15-MAY-19 22:45:00 to 15-MAY-19 22:45:00 (CST-6)
Location: GREAT BEND
Magnitude: 56.00 EG
Reported by: Public

Several five inch diameter tree branches were blown down. The wind was accompanied by dime to nickel sized hail.