A mid level short wave impulse ejecting northeast across the Northern High Plains, combined with an eastward advecting cold front and favorable instability parameters to create an environment supportive for severe thunderstorms. Severe Thunderstorm Watch number 421 was issued for south central North Dakota early in the evening of June 2nd, and was then followed up with Severe Thunderstorm Watch number 422 early in the morning of June 3rd for ongoing storms producing strong winds.
Multiple severe thunderstorm warnings, one tornado warning, and one flash flood warning were issued during this episode. Numerous reports of large hail, several reports of severe thunderstorm wind gusts, and two reports of brief but very heavy rain were received. Thunderstorm winds were most intense across portions of Emmons and Logan Counties, where estimated winds up to 100 mph caused damage to several farmsteads and local communities.

Hail in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 20:43:00 to 02-JUN-11 20:50:00 (CST-6)
Location: BOTTINEAU
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 20:28:00 to 02-JUN-11 20:35:00 (CST-6)
Location: BOTTINEAU
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Heavy Rain in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 20:28:00 to 02-JUN-11 20:43:00 (CST-6)
Location: BOTTINEAU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A rainfall amount of 8 tenths of an inch was reported in fifteen minutes.

Hail in GRANT, NORTH DAKOTA
From 02-JUN-11 18:30:00 to 02-JUN-11 18:33:00 (MST-7)
Location: LEITH
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SIOUX, NORTH DAKOTA
From 02-JUN-11 18:49:00 to 02-JUN-11 18:53:00 (MST-7)
Location: SELFRIDGE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 19:57:00 to 02-JUN-11 20:03:00 (CST-6)
Location: KRAMER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 19:59:00 to 02-JUN-11 20:07:00 (CST-6)
Location: BOTTINEAU
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 20:46:00 to 02-JUN-11 20:49:00 (CST-6)
Location: BOTTINEAU ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 21:00:00 to 02-JUN-11 21:08:00 (CST-6)
Location: BOTTINEAU ARPT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 21:00:00 to 02-JUN-11 21:06:00 (CST-6)
Location: OMEMEE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in EMMONS, NORTH DAKOTA
From 02-JUN-11 23:35:00 to 02-JUN-11 23:42:00 (CST-6)
Location: LINTON MUNI ARPT
Magnitude: 82.00 MG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: AWOS

One hanger and two planes were destroyed at the Linton Airport.

Heavy Rain in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 20:41:00 to 02-JUN-11 21:11:00 (CST-6)
Location: BOTTINEAU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A rainfall total of one inch was reported in just over 20 minutes.

Thunderstorm Wind in EMMONS, NORTH DAKOTA
From 02-JUN-11 23:50:00 to 02-JUN-11 23:57:00 (CST-6)
Location: KINTYRE
Magnitude: 87.00 EG
Property damage: 350.00K
Crop damage: 0.00K
Reported by: Newspaper

Strong thunderstorm winds resulted in a pole barn being destroyed and a stock trailer rolled approximately 200 feet. Also on the farmstead, a garage roof was ripped off, a well house was totaled, a grain bin blown over, and windows were blown out of vehicles.

Hail in EMMONS, NORTH DAKOTA
From 03-JUN-11 00:00:00 to 03-JUN-11 00:10:00 (CST-6)
Location: STRASBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in STUTSMAN, NORTH DAKOTA
From 03-JUN-11 00:40:00 to 03-JUN-11 00:50:00 (CST-6)
Location: MEDINA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A public report relayed by North Dakota State radio.

Thunderstorm Wind in FOSTER, NORTH DAKOTA
From 03-JUN-11 01:25:00 to 03-JUN-11 01:35:00 (CST-6)
Location: CARRINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A public report relayed by North Dakota State radio.

Thunderstorm Wind in FOSTER, NORTH DAKOTA
From 03-JUN-11 01:35:00 to 03-JUN-11 01:45:00 (CST-6)
Location: CARRINGTON
Magnitude: 68.00 MG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: AWOS

The strong winds resulted in downed trees and power lines in Carrington.

Hail in BOTTINEAU, NORTH DAKOTA
From 02-JUN-11 20:55:00 to 02-JUN-11 21:01:00 (CST-6)
Location: BOTTINEAU
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm Wind in LOGAN, NORTH DAKOTA
From 03-JUN-11 00:30:00 to 03-JUN-11 00:40:00 (CST-6)
Location: NAPOLEON
Magnitude: 74.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Very strong thunderstorm winds resulted in a cattle trailer being blown over in Napoleon.

Thunderstorm Wind in EMMONS, NORTH DAKOTA
From 02-JUN-11 23:37:00 to 02-JUN-11 23:45:00 (CST-6)
Location: LINTON
Magnitude: 83.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree and some minor structure damage was reported in Linton.

Thunderstorm Wind in EMMONS, NORTH DAKOTA
From 02-JUN-11 23:52:00 to 03-JUN-11 00:01:00 (CST-6)
Location: KINTYRE
Magnitude: 78.00 EG
Property damage: 125.00K
Crop damage: 0.00K
Reported by: Newspaper

Strong thunderstorm winds resulted in a historic barn destroyed near Kintyre.

Thunderstorm Wind in EMMONS, NORTH DAKOTA
From 02-JUN-11 23:53:00 to 03-JUN-11 00:01:00 (CST-6)
Location: KINTYRE
Magnitude: 78.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Newspaper

Strong thunderstorm winds resulted in a storage shelter destroyed at the Kintyre Centennial Park. Also damaged was a 50,000 bushel bin at the South Central Grain elevator in Kintyre.