By the afternoon of August 27th, temperatures across most of the area had risen into the 70s, along with dew points around 60 F. A fairly strong upper level disturbance also moved into the area. Thunderstorms broke out over the southern Red River Valley in the early afternoon, then expanded north and east through the rest of the afternoon and early evening. The thunderstorms mainly dropped large hail, but a few tornadoes also occurred.

Hail in CASS, NORTH DAKOTA
From 27-AUG-16 12:08:00 to 27-AUG-16 12:08:00 (CST-6)
Location: OSGOOD
Magnitude: 0.75 
Reported by: Trained Spotter

The hail ranged from pea to penny size.

Hail in RICHLAND, NORTH DAKOTA
From 27-AUG-16 12:10:00 to 27-AUG-16 12:10:00 (CST-6)
Location: COLFAX
Magnitude: 0.88 
Reported by: Public

Gusty winds were also reported.

Hail in CASS, NORTH DAKOTA
From 27-AUG-16 12:13:00 to 27-AUG-16 12:13:00 (CST-6)
Location: RIVERSIDE
Magnitude: 1.25 
Reported by: Trained Spotter

Nickel to half dollar size hail fell along with winds estimated at 40 mph.

Hail in CASS, NORTH DAKOTA
From 27-AUG-16 12:10:00 to 27-AUG-16 12:10:00 (CST-6)
Location: RIVERSIDE
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in GRAND FORKS, NORTH DAKOTA
From 27-AUG-16 14:06:00 to 27-AUG-16 14:06:00 (CST-6)
Location: HONEYFORD
Magnitude: 0.75 
Reported by: Public

Hail in PEMBINA, NORTH DAKOTA
From 27-AUG-16 14:23:00 to 27-AUG-16 14:23:00 (CST-6)
Location: ST THOMAS
Magnitude: 1.00 
Reported by: Law Enforcement

Pea to quarter sized hail fell along highway 81 at the Pembina and Walsh county line.

Hail in PEMBINA, NORTH DAKOTA
From 27-AUG-16 14:37:00 to 27-AUG-16 14:37:00 (CST-6)
Location: ST THOMAS
Magnitude: 1.25 
Reported by: Law Enforcement

Walnut sized hail was reported along highway 81 at the Walsh and Pembina county line.

Hail in GRAND FORKS, NORTH DAKOTA
From 27-AUG-16 14:41:00 to 27-AUG-16 14:41:00 (CST-6)
Location: ARVILLA
Magnitude: 2.50 
Reported by: Social Media

Hail in GRAND FORKS, NORTH DAKOTA
From 27-AUG-16 14:50:00 to 27-AUG-16 14:50:00 (CST-6)
Location: (RDR)GRAND FORKS AFB
Magnitude: 0.75 
Reported by: Social Media

Pea to dime sized hail fell.

Hail in WALSH, NORTH DAKOTA
From 27-AUG-16 14:52:00 to 27-AUG-16 14:52:00 (CST-6)
Location: NASH
Magnitude: 1.00 
Reported by: Public

Tornado in GRAND FORKS, NORTH DAKOTA
From 27-AUG-16 15:12:00 to 27-AUG-16 15:14:00 (CST-6)
Location: ARVILLA
Tornado F-scale: EF0
Reported by: Storm Chaser

The tornado touched down in an open field. Peak winds were estimated at 70 mph.

Tornado in GRAND FORKS, NORTH DAKOTA
From 27-AUG-16 15:18:00 to 27-AUG-16 15:32:00 (CST-6)
Location: ARVILLA
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A large tornado tracked to the southeast and snapped or uprooted numerous trees along its path. It demolished a small barn and spread barn and ranch debris over a broad area. Peak winds were estimated at 110 mph.

Hail in GRAND FORKS, NORTH DAKOTA
From 27-AUG-16 15:30:00 to 27-AUG-16 15:30:00 (CST-6)
Location: EMERADO
Magnitude: 1.75 
Reported by: Trained Spotter

Large hail fell across southern Oakville and Chester townships.

Hail in GRAND FORKS, NORTH DAKOTA
From 27-AUG-16 16:18:00 to 27-AUG-16 16:18:00 (CST-6)
Location: HOLMES
Magnitude: 2.50 
Reported by: Social Media

Hail in TRAILL, NORTH DAKOTA
From 27-AUG-16 16:40:00 to 27-AUG-16 16:40:00 (CST-6)
Location: BUXTON
Magnitude: 1.50 
Reported by: Trained Spotter

Thunderstorm Wind in TRAILL, NORTH DAKOTA
From 27-AUG-16 17:01:00 to 27-AUG-16 17:01:00 (CST-6)
Location: BUXTON
Magnitude: 57.00 MG
Reported by: Mesonet

The wind gust was measured by the Buxton RWIS near mile marker 114 on Interstate 29.

Tornado in TRAILL, NORTH DAKOTA
From 27-AUG-16 17:02:00 to 27-AUG-16 17:10:00 (CST-6)
Location: TAFT
Tornado F-scale: EF3
Reported by: NWS Storm Survey

The tornado destroyed a two car garage and snapped or uprooted numerous trees northwest of the Taft elevator. It crossed Interstate 29 near Taft and tore down filled grain bins, elevator legs, and tore the roofing off the office. It then tore the roof off and caved in the walls of a well built home east of the elevator complex. Peak winds were estimated at 140 mph.

Hail in CASS, NORTH DAKOTA
From 27-AUG-16 12:14:00 to 27-AUG-16 12:24:00 (CST-6)
Location: FARGO
Magnitude: 2.00 
Reported by: Trained Spotter

The hail varied in size and turned the ground white.

Hail in WALSH, NORTH DAKOTA
From 27-AUG-16 15:29:00 to 27-AUG-16 15:29:00 (CST-6)
Location: GRAFTON
Magnitude: 1.00 
Reported by: Law Enforcement