Late in the evening of the 17th, an area of surface low pressure was located just northeast of Jamestown, North Dakota, with a cold front extending south from the low. A warm front arched to the northeast, from near Jamestown to Grand Forks to Bemidji (MN). From the surface through the low layers of the atmosphere, wind speeds were quite strong. In the late afternoon of the 17th, one lone thunderstorm cell developed over Polk County (MN). By early evening, another lone  thunderstorm developed over Ramsey County (ND). Finally, just before midnight, a line of thunderstorms took shape over eastern North Dakota. This line of storms moved into northwest Minnesota around midnight.

Tornado in NELSON, NORTH DAKOTA
From 17-JUN-07 20:50:00 to 17-JUN-07 20:50:00 (CST-6)
Location: DAHLEN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two brief touchdowns occurred in an open field.

Thunderstorm Wind in BARNES, NORTH DAKOTA
From 17-JUN-07 21:30:00 to 17-JUN-07 21:30:00 (CST-6)
Location: VALLEY CITY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Large trees and branches were blown down. Some of the trees fell on powerlines, causing power outages.

Thunderstorm Wind in BARNES, NORTH DAKOTA
From 17-JUN-07 21:25:00 to 17-JUN-07 21:25:00 (CST-6)
Location: LITCHVILLE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A large steel storage bin was tipped over and large trees were blown down.

Thunderstorm Wind in CASS, NORTH DAKOTA
From 17-JUN-07 21:32:00 to 17-JUN-07 21:32:00 (CST-6)
Location: KINDRED
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Many trees were uprooted or snapped off. Several roads and city streets were blocked by fallen trees.

Hail in WALSH, NORTH DAKOTA
From 17-JUN-07 20:44:00 to 17-JUN-07 20:44:00 (CST-6)
Location: LANKIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WALSH, NORTH DAKOTA
From 17-JUN-07 20:58:00 to 17-JUN-07 20:58:00 (CST-6)
Location: LANKIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WALSH, NORTH DAKOTA
From 17-JUN-07 21:00:00 to 17-JUN-07 21:02:00 (CST-6)
Location: LANKIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BENSON, NORTH DAKOTA
From 17-JUN-07 21:10:00 to 17-JUN-07 21:10:00 (CST-6)
Location: MADDOCK MUNI ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 17-JUN-07 22:05:00 to 17-JUN-07 22:05:00 (CST-6)
Location: DE LAMERE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were uprooted.

Thunderstorm Wind in CASS, NORTH DAKOTA
From 17-JUN-07 22:42:00 to 17-JUN-07 22:42:00 (CST-6)
Location: FARGO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Many trees and tree branches were blown down by the strong wind. One large tree fell on an apartment building.

Thunderstorm Wind in CASS, NORTH DAKOTA
From 17-JUN-07 22:15:00 to 17-JUN-07 22:15:00 (CST-6)
Location: BUFFALO
Magnitude: 83.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Three large 60,000 bushel steel grain bins were torn off their concrete pads. Dryers and other equipment at the grain company were knocked over. Flying metal cut a nearby powerline. Numerous trees in the town were also uprooted.

Thunderstorm Wind in CASS, NORTH DAKOTA
From 17-JUN-07 22:33:00 to 17-JUN-07 22:33:00 (CST-6)
Location: ST BENEDICT
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two large steel grain bins were caved in by the strong wind. Many trees were uprooted or snapped in two.

Thunderstorm Wind in RICHLAND, NORTH DAKOTA
From 17-JUN-07 22:50:00 to 17-JUN-07 22:50:00 (CST-6)
Location: WYNDMERE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down in Wyndmere. Some of the trees fell on powerlines.

Thunderstorm Wind in RICHLAND, NORTH DAKOTA
From 17-JUN-07 22:30:00 to 17-JUN-07 22:30:00 (CST-6)
Location: COLFAX KURUC ARPT
Magnitude: 78.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees were blown down. Windows were broken at a shop by flying rocks and debris. A 60 foot tall radio tower was also blown down. The peak winds were estimated at 90 mph.

Flash Flood in GRIGGS, NORTH DAKOTA
From 18-JUN-07 00:15:00 to 18-JUN-07 05:00:00 (CST-6)
Location: REVERE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several hundred acres of farm fields were flooded as well as a farm access road.

Thunderstorm Wind in CASS, NORTH DAKOTA
From 17-JUN-07 22:34:00 to 17-JUN-07 22:34:00 (CST-6)
Location: HICKSON
Magnitude: 78.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Many trees were snapped off or uprooted. A piece of roof was torn off the southwest corner of a house.

Flash Flood in STEELE, NORTH DAKOTA
From 18-JUN-07 00:24:00 to 18-JUN-07 05:00:00 (CST-6)
Location: PICKERT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The sheriff reported a township bridge under water. Water also covered state highway 32 about 4 miles south of Finley. Two to three inches of rain fell in about 8 hours across Greenview and Eastin Townships.

Hail in GRIGGS, NORTH DAKOTA
From 17-JUN-07 21:10:00 to 17-JUN-07 21:10:00 (CST-6)
Location: COOPERSTOWN ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Very heavy rain accompanied the hail.

Hail in BENSON, NORTH DAKOTA
From 17-JUN-07 21:30:00 to 17-JUN-07 21:30:00 (CST-6)
Location: TILDEN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in STEELE, NORTH DAKOTA
From 17-JUN-07 21:25:00 to 17-JUN-07 21:25:00 (CST-6)
Location: FINLEY ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Funnel Cloud in GRIGGS, NORTH DAKOTA
From 17-JUN-07 20:19:00 to 17-JUN-07 20:19:00 (CST-6)
Location: WALUM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The funnel cloud did not last long.

Hail in BARNES, NORTH DAKOTA
From 17-JUN-07 20:40:00 to 17-JUN-07 20:40:00 (CST-6)
Location: WIMBLEDON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Very heavy rain accompanied the hail.

Hail in RAMSEY, NORTH DAKOTA
From 17-JUN-07 21:35:00 to 17-JUN-07 21:35:00 (CST-6)
Location: RAMSEY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in RANSOM, NORTH DAKOTA
From 17-JUN-07 22:00:00 to 17-JUN-07 22:00:00 (CST-6)
Location: ENDERLIN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Many large trees and tree branches were blown down.

Thunderstorm Wind in RANSOM, NORTH DAKOTA
From 17-JUN-07 21:30:00 to 17-JUN-07 21:30:00 (CST-6)
Location: FT RANSOM
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and a grain auger were blown over. A large unanchored metal shed was blown into a larger machine shed, leaving a tangled metal mess.

Hail in RAMSEY, NORTH DAKOTA
From 17-JUN-07 19:07:00 to 17-JUN-07 19:07:00 (CST-6)
Location: WEBSTER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in NELSON, NORTH DAKOTA
From 17-JUN-07 20:42:00 to 17-JUN-07 20:42:00 (CST-6)
Location: WHITMAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CASS, NORTH DAKOTA
From 17-JUN-07 22:35:00 to 17-JUN-07 22:35:00 (CST-6)
Location: WEST FARGO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Many trees were blown down. One tree fell on a house.

Flash Flood in BARNES, NORTH DAKOTA
From 18-JUN-07 00:00:00 to 18-JUN-07 05:00:00 (CST-6)
Location: DAZEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Ditches and fields were flooded by the heavy rain. Water covered a county road just north of state highway 26.

Thunderstorm Wind in CASS, NORTH DAKOTA
From 17-JUN-07 22:35:00 to 17-JUN-07 22:35:00 (CST-6)
Location: HICKSON
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm Wind in CASS, NORTH DAKOTA
From 17-JUN-07 22:37:00 to 17-JUN-07 22:37:00 (CST-6)
Location: (FAR)HECTOR INTL ARP
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Fargo ASOS measured a 61 mph wind gust. Just to the southeast of the airport, a building under construction was damaged.

Thunderstorm Wind in TRAILL, NORTH DAKOTA
From 17-JUN-07 22:47:00 to 17-JUN-07 22:47:00 (CST-6)
Location: KELSO
Magnitude: 75.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A semi, towing two trailers at mile marker 97 on Interstate 29, had its second trailer blown on its side into the median by the strong straight line winds.

Thunderstorm Wind in SARGENT, NORTH DAKOTA
From 17-JUN-07 21:30:00 to 17-JUN-07 21:30:00 (CST-6)
Location: FORMAN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Large willow trees were uprooted and a small building was leveled by the strong wind.