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.

Thunderstorm Wind in WILKIN, MINNESOTA
From 17-JUN-07 22:55:00 to 17-JUN-07 22:55:00 (CST-6)
Location: BRECKENRIDGE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Seven empty railroad grain cars were tipped off a railroad track. 62 other empty railroad cars were pushed one mile south of their parked location.

Thunderstorm Wind in OTTER TAIL, MINNESOTA
From 17-JUN-07 23:05:00 to 17-JUN-07 23:05:00 (CST-6)
Location: PELICAN RPDS MUNI AR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Many 8 inch diameter tree limbs were blown down.

Thunderstorm Wind in NORMAN, MINNESOTA
From 17-JUN-07 23:18:00 to 17-JUN-07 23:18:00 (CST-6)
Location: RANUM
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 10 inch diameter tree was snapped off and other large tree branches were blown down by the strong wind.

Thunderstorm Wind in POLK, MINNESOTA
From 17-JUN-07 23:19:00 to 17-JUN-07 23:19:00 (CST-6)
Location: RINDAL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Many large trees and tree branches were blown down in shelterbelts.

Thunderstorm Wind in BECKER, MINNESOTA
From 17-JUN-07 23:20:00 to 17-JUN-07 23:20:00 (CST-6)
Location: SHOREHAM
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Many large trees were blown down near Lake Sallie.

Thunderstorm Wind in RED LAKE, MINNESOTA
From 17-JUN-07 23:40:00 to 17-JUN-07 23:40:00 (CST-6)
Location: RED LAKE FALLS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Many large trees were snapped off or uprooted.

Funnel Cloud in POLK, MINNESOTA
From 17-JUN-07 15:05:00 to 17-JUN-07 15:05:00 (CST-6)
Location: FREEMAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in CLAY, MINNESOTA
From 17-JUN-07 22:54:00 to 17-JUN-07 22:54:00 (CST-6)
Location: MOORHEAD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down, causing power outages. A large steel sign was bent in half, onto the roof of a business.

Thunderstorm Wind in POLK, MINNESOTA
From 17-JUN-07 23:25:00 to 17-JUN-07 23:25:00 (CST-6)
Location: MENTOR
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Many large trees and tree branches were blown down by the strong wind. Boats, boat lifts, roofs, and docks were damaged. One cabin on Maple Lake had its windows broken and a wall bowed in.

Thunderstorm Wind in CLEARWATER, MINNESOTA
From 17-JUN-07 23:55:00 to 17-JUN-07 23:55:00 (CST-6)
Location: BAGLEY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roof and tree damage was reported.

Tornado in POLK, MINNESOTA
From 17-JUN-07 15:11:00 to 17-JUN-07 15:13:00 (CST-6)
Location: GIRARD
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The tornado touched down in an open field to the south of county road 9, about 2 miles west of the sugar beet plant. A rope funnel persisted for about 3 minutes, with intermittent tornado touchdowns over about a 2 minute period.

Thunderstorm Wind in CLAY, MINNESOTA
From 17-JUN-07 22:55:00 to 17-JUN-07 22:55:00 (CST-6)
Location: BARNESVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down in a shelterbelt near the Clay and Wilkin County line.

Thunderstorm Wind in WILKIN, MINNESOTA
From 17-JUN-07 22:55:00 to 17-JUN-07 22:55:00 (CST-6)
Location: LAWNDALE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down in a shelterbelt near the Clay and Wilkin County line.

Thunderstorm Wind in NORMAN, MINNESOTA
From 17-JUN-07 23:05:00 to 17-JUN-07 23:05:00 (CST-6)
Location: ADA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were blown down in Ada. Some trees blocked roads or streets.

Thunderstorm Wind in ROSEAU, MINNESOTA
From 18-JUN-07 01:00:00 to 18-JUN-07 01:00:00 (CST-6)
Location: (D45)CARLSON FLD WAR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down in a mobile home park.

Thunderstorm Wind in POLK, MINNESOTA
From 17-JUN-07 23:36:00 to 17-JUN-07 23:36:00 (CST-6)
Location: FASSTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in RED LAKE, MINNESOTA
From 17-JUN-07 23:40:00 to 17-JUN-07 23:40:00 (CST-6)
Location: PLUMMER
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Metal roofing was pulled off a bank building, which caused water damage inside. Trees were blown down in town too.

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 18-JUN-07 00:00:00 to 18-JUN-07 00:00:00 (CST-6)
Location: GOODRIDGE
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Many large trees were snapped off or uprooted. A metal storage shed full of furnature was blown across a yard. Truck loading equipment was blown down at the fertilizer plant.

Thunderstorm Wind in BECKER, MINNESOTA
From 17-JUN-07 23:18:00 to 17-JUN-07 23:18:00 (CST-6)
Location: DETROIT LAKES
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

At Lake Maud, strong winds damaged a cabin roof and uprooted many trees. Some trees fell on lake cabins.

Thunderstorm Wind in BECKER, MINNESOTA
From 17-JUN-07 23:22:00 to 17-JUN-07 23:22:00 (CST-6)
Location: DETROIT LAKES
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Strong winds twisted the fishing pier and knocked over trees.

Thunderstorm Wind in POLK, MINNESOTA
From 17-JUN-07 23:36:00 to 17-JUN-07 23:36:00 (CST-6)
Location: FOSSTON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Strong winds blew 4 trees onto a house.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 18-JUN-07 00:30:00 to 18-JUN-07 00:30:00 (CST-6)
Location: BLACKDUCK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Many trees were blown down. Scattered electrical outages were also reported.

Thunderstorm Wind in POLK, MINNESOTA
From 17-JUN-07 23:45:00 to 17-JUN-07 23:45:00 (CST-6)
Location: RINDAL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was blown down and a trampoline was blown 60 feet. A metal city dumpster was tipped over.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 18-JUN-07 00:20:00 to 18-JUN-07 00:20:00 (CST-6)
Location: BEMIDJI
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Many large trees were blown down.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 18-JUN-07 00:40:00 to 18-JUN-07 00:40:00 (CST-6)
Location: WASKISH
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A roof was partially torn off an outbuilding.

Thunderstorm Wind in MARSHALL, MINNESOTA
From 18-JUN-07 00:15:00 to 18-JUN-07 00:15:00 (CST-6)
Location: THIEF LAKE REFUGE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Sixty to seventy trees were snapped or uprooted at the Thief Lake Wildlife Area. Some trees blocked roads. A small shed was also blown 100 feet away. A powerline was cut to the main building.

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 17-JUN-07 23:50:00 to 17-JUN-07 23:50:00 (CST-6)
Location: HAZEL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Twenty trees were blown over.

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 18-JUN-07 00:00:00 to 18-JUN-07 00:00:00 (CST-6)
Location: ERIE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Twenty trees were blown down. One tree fell across a road.

Thunderstorm Wind in CLEARWATER, MINNESOTA
From 18-JUN-07 00:15:00 to 18-JUN-07 00:15:00 (CST-6)
Location: LAKE ITASCA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

At Lake Itasca State Park, many trees were blown down along the east and north entry roads and along the wilderness trail.

Thunderstorm Wind in BECKER, MINNESOTA
From 17-JUN-07 23:09:00 to 17-JUN-07 23:09:00 (CST-6)
Location: LAKE PARK
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind gust was measured by a MNDOT RWIS wind sensor on U.S. Highway 10.

Thunderstorm Wind in MAHNOMEN, MINNESOTA
From 17-JUN-07 23:20:00 to 17-JUN-07 23:20:00 (CST-6)
Location: MAHNOMEN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind gust was measured by a MNDOT RWIS wind sensor on U.S. Highway 59.

Thunderstorm Wind in POLK, MINNESOTA
From 17-JUN-07 23:28:00 to 17-JUN-07 23:28:00 (CST-6)
Location: ERSKINE
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The 73 mph wind gust was measured by a MNDOT RWIS site on U.S. Highway 59, along the Red Lake and Polk County line.

Thunderstorm Wind in RED LAKE, MINNESOTA
From 17-JUN-07 23:29:00 to 17-JUN-07 23:29:00 (CST-6)
Location: BROOKS
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The 73 mph wind gust was measured by a MNDOT RWIS site on U.S. Highway 59, along the Red Lake and Polk County line.

Thunderstorm Wind in WILKIN, MINNESOTA
From 17-JUN-07 22:40:00 to 17-JUN-07 22:40:00 (CST-6)
Location: BRUSHVALE
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind gust was measured by an NDAWN mesonet wind sensor.

Thunderstorm Wind in CLAY, MINNESOTA
From 17-JUN-07 22:42:00 to 17-JUN-07 22:42:00 (CST-6)
Location: MOORHEAD ARPT
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The wind gust was measured by a MNDOT RWIS wind sensor along Interstate 94 east of Moorhead.

Thunderstorm Wind in HUBBARD, MINNESOTA
From 18-JUN-07 00:15:00 to 18-JUN-07 00:15:00 (CST-6)
Location: LAKE GEORGE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Numerous trees were blown down near the east entry to Lake Itasca State Park.