A strong short wave trough ejecting into the Northern Plains, coupled with increasing large scale ascent ahead of an upper level jet streak, brought widespread severe weather to much of southwest and south central North Dakota during the evening hours of June 12th. Favorable low level vertical wind shear increased the threat for supercellular storms and isolated tornados. Tornado Watch number 468 was initially issued during the mid afternoon for far southwest North Dakota, followed by Tornado Watch number 469 issued in the early evening for all of west and central North Dakota.
Numerous severe thunderstorm warnings, several tornado warnings, and several flood and flash flood warnings were issued during this event. Numerous reports of large hail, several reports of severe thunderstorm wind gusts, several reports of flash flooding, and four confirmed tornadoes, including one EF2 tornado, occurred during this event.

Tornado in MORTON, NORTH DAKOTA
From 12-JUN-11 20:00:00 to 12-JUN-11 20:02:00 (CST-6)
Location: JUDSON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotters reported a brief tornado touchdown in open country northwest of Sweet Briar Lake. No reports of damage, injuries, or fatalities occurred with this tornado. Based on the report, this was a weak EF0 tornado on the Enhanced Fujita Scale, with winds of 70 miles per hour.

Tornado in MORTON, NORTH DAKOTA
From 12-JUN-11 19:45:00 to 12-JUN-11 19:49:00 (CST-6)
Location: JUDSON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

This tornado briefly touched down in the open country. No reports of damage, injuries, or fatalities occurred with this tornado. Based on the report, this was a weak EF0 tornado on the Enhanced Fujita Scale, with winds of 70 miles per hour.

Tornado in HETTINGER, NORTH DAKOTA
From 12-JUN-11 17:25:00 to 12-JUN-11 17:27:00 (MST-7)
Location: MOTT MUNI ARPT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 5.00K
Reported by: COOP Observer

The observer reported a tornado briefly touched down in his farm fields and destroyed crops. No other damage, injuries, or fatalities occurred with this tornado.  Based on the report, this was a weak EF0 tornado on the Enhanced Fujita Scale, with winds of 70 miles per hour.

Flash Flood in MORTON, NORTH DAKOTA
From 12-JUN-11 20:30:00 to 12-JUN-11 22:00:00 (CST-6)
Location: HEBRON
Flood cause: Heavy Rain
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Over one foot of water was over both the west and east bound lanes of Interstate 94 near mile marker 106. A three car accident was attributed to the flash flooding from the heavy rain. No injuries were reported. There was also flash flooding of other low water crossing area along the interstate in western Morton County. A report of 2.33 inches of rain in less than two hours was received from the Glen Ullin area.

Flash Flood in OLIVER, NORTH DAKOTA
From 12-JUN-11 22:15:00 to 13-JUN-11 01:00:00 (CST-6)
Location: CENTER
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy rainfall of over three inches resulted in widespread flash flooding over eastern Oliver County as confirmed by emergency management. Low water crossings were flooded with damage to gravel roads and culverts.

Funnel Cloud in MORTON, NORTH DAKOTA
From 12-JUN-11 20:48:00 to 12-JUN-11 20:48:00 (CST-6)
Location: ALMONT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 12-JUN-11 20:34:00 to 12-JUN-11 20:34:00 (CST-6)
Location: ALMONT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Delete.

Heavy Rain in MORTON, NORTH DAKOTA
From 12-JUN-11 21:20:00 to 12-JUN-11 21:45:00 (CST-6)
Location: MANDAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A report of 1.10 inches of heavy rain in 25 minutes.

Flash Flood in GRANT, NORTH DAKOTA
From 12-JUN-11 20:00:00 to 12-JUN-11 23:00:00 (MST-7)
Location: ELGIN
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Very heavy rainfall contributed to flash flooding along Antelope Creek near North Dakota Highway 49. A storm survey crew observed high water marks near the top of barbed wire fences in this area. The Carson Press newspaper reported damage was sustained to rural roads north of Elgin.

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 12-JUN-11 20:50:00 to 12-JUN-11 21:10:00 (CST-6)
Location: NEW SALEM
Magnitude: 74.00 EG
Property damage: 45.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Strong thunderstorm winds up to 85 miles per hour resulted in a path of damage east of New Salem. Two outbuildings on a farmstead had roofs blown off, and one had walls collapsed. Damage was indicative of strong straight line winds, with all debris blown to the northeast.

Tornado in GRANT, NORTH DAKOTA
From 12-JUN-11 19:15:00 to 12-JUN-11 19:22:00 (MST-7)
Location: NEW LEIPZIG
Tornado F-scale: EF2
Property damage: 200.00K
Crop damage: 50.00K
Reported by: NWS Storm Survey

A National Weather Service storm survey confirmed that an EF2 tornado on the Enhanced Fujita Scale touched down eight miles south-southwest of Elgin, then moved northeast before lifting 3 miles south-southeast of Elgin. No fewer than four farmsteads were damaged along the path of the tornado. The worst damage occurred six miles south-southwest of Elgin, where the tornado was nearly one half of a mile wide, damaging every building on a farmstead and completely destroying the smaller buildings. Damage also occurred to trees, vehicles, and power poles. The damage surveyed corresponded to EF2 on the Enhanced Fujita Scale. From that it was determined that wind speeds were on the order of around 120 miles per hour.
Farther north-northeast, three other farmsteads sustained tornado damage. Damage on the first two farmsteads north-northeast of the worst damage was consistent with an EF1 tornado. The farthest north farmstead had damage consistent with an EF0 tornado.
There were no injuries or fatalities with this tornado.

Flash Flood in GRANT, NORTH DAKOTA
From 12-JUN-11 20:00:00 to 12-JUN-11 23:00:00 (MST-7)
Location: NEW LEIPZIG
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

Very heavy rainfall contributed to flash flooding in and around New Leipzig. Streets quickly became flooded, and sewage backup was reported in basements.

Hail in GRANT, NORTH DAKOTA
From 12-JUN-11 17:55:00 to 12-JUN-11 17:57:00 (MST-7)
Location: ELGIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HETTINGER, NORTH DAKOTA
From 12-JUN-11 18:25:00 to 12-JUN-11 18:30:00 (MST-7)
Location: NEW ENGLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in MORTON, NORTH DAKOTA
From 12-JUN-11 18:34:00 to 12-JUN-11 18:40:00 (CST-6)
Location: GLEN ULLIN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MORTON, NORTH DAKOTA
From 12-JUN-11 19:02:00 to 12-JUN-11 19:08:00 (CST-6)
Location: SWEET BRIAR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MORTON, NORTH DAKOTA
From 12-JUN-11 19:07:00 to 12-JUN-11 19:14:00 (CST-6)
Location: SWEET BRIAR
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Funnel Cloud in STARK, NORTH DAKOTA
From 12-JUN-11 19:18:00 to 12-JUN-11 19:19:00 (MST-7)
Location: RICHARDTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

This report was relayed by the Stark County Emergency Manager from a public report of a brief appearance of a funnel cloud.

Funnel Cloud in STARK, NORTH DAKOTA
From 12-JUN-11 19:27:00 to 12-JUN-11 19:28:00 (MST-7)
Location: RICHARDTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A funnel cloud briefly formed near Richardton.

Hail in MORTON, NORTH DAKOTA
From 12-JUN-11 19:29:00 to 12-JUN-11 19:34:00 (CST-6)
Location: SWEET BRIAR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in MORTON, NORTH DAKOTA
From 12-JUN-11 19:29:00 to 12-JUN-11 19:35:00 (CST-6)
Location: NEW SALEM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy rain accompanied the large hail.

Thunderstorm Wind in GRANT, NORTH DAKOTA
From 12-JUN-11 19:37:00 to 12-JUN-11 19:44:00 (MST-7)
Location: CARSON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Grant County Sheriff estimated strong thunderstorm winds up to 60 miles per hour.

Thunderstorm Wind in BURLEIGH, NORTH DAKOTA
From 12-JUN-11 21:20:00 to 12-JUN-11 21:30:00 (CST-6)
Location: BISMARCK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm winds estimated at 70 miles per hour were reported in central Bismarck.

Hail in GRANT, NORTH DAKOTA
From 12-JUN-11 17:55:00 to 12-JUN-11 17:57:00 (MST-7)
Location: ELGIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MORTON, NORTH DAKOTA
From 12-JUN-11 20:43:00 to 12-JUN-11 20:48:00 (CST-6)
Location: FLASHER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Estimated thunderstorm winds of 60 miles per hour were reported northwest of Flasher.