During the late afternoon of July 21st, a stationary boundary set up across northeast North Dakota. Temperatures north of the boundary were generally in the low to mid 80s, while to the south they were in the mid 80s to low 90s. Surface dew point readings were very high, with most locations in the low to mid 70s. A few thunderstorms fired north of the front around the Langdon, ND, area, dropping some large hail. However, the more significant action came from a thunderstorm complex that formed across west central North Dakota and moved east during the evening. This complex evolved into a bow echo with good rotational structure on the northern book end vortice. Strong straight line winds, large hail, and a few tornadoes were reported as this complex moved across eastern North Dakota into the northwest quarter of Minnesota.

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 21-JUL-14 20:35:00 to 21-JUL-14 20:35:00 (CST-6)
Location: (TVF)THIEF RVR FALLS
Magnitude: 50.00 MG
Reported by: AWOS

The peak wind was measured at the Thief River Falls Regional Airport.

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 21-JUL-14 20:35:00 to 21-JUL-14 20:35:00 (CST-6)
Location: THIEF RIVER FALLS
Magnitude: 52.00 EG
Reported by: Public

Numerous trees were blown down in Thief River Falls, knocking out power to some areas.

Thunderstorm Wind in PENNINGTON, MINNESOTA
From 21-JUL-14 20:55:00 to 21-JUL-14 20:55:00 (CST-6)
Location: ERIE
Magnitude: 60.00 EG
Reported by: Public

Numerous large tree branches and limbs were broken down in shelterbelts across Highlanding Township.

Thunderstorm Wind in CLEARWATER, MINNESOTA
From 21-JUL-14 21:30:00 to 21-JUL-14 21:30:00 (CST-6)
Location: LAKE ITASCA
Magnitude: 65.00 EG
Reported by: Park/Forest Service

A few pine and poplar trees were snapped around Itasca State Park.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 21-JUL-14 21:20:00 to 21-JUL-14 21:20:00 (CST-6)
Location: FOURTOWN
Magnitude: 65.00 EG
Reported by: County Official

Numerous trees were blown down along highway 89 between Fourtown and Thorhult, across Steenerson Township.

Thunderstorm Wind in BECKER, MINNESOTA
From 21-JUL-14 21:35:00 to 21-JUL-14 21:35:00 (CST-6)
Location: TWO INLETS
Magnitude: 61.00 EG
Reported by: Public

Boat docks, lifts, and watercraft were tossed about by wave and wind action on Two Inlets Lake. Numerous pine and poplar trees were snapped across Two Inlets and Savannah townships.

Hail in OTTER TAIL, MINNESOTA
From 21-JUL-14 21:40:00 to 21-JUL-14 21:40:00 (CST-6)
Location: OTTERTAIL
Magnitude: 1.00 
Reported by: Broadcast Media

Widespread power outages were also reported.

Thunderstorm Wind in HUBBARD, MINNESOTA
From 21-JUL-14 21:45:00 to 21-JUL-14 21:45:00 (CST-6)
Location: LAKE GEORGE
Magnitude: 65.00 EG
Reported by: Emergency Manager

A few pine and poplar trees were snapped off along highway 71.

Thunderstorm Wind in WADENA, MINNESOTA
From 21-JUL-14 22:05:00 to 21-JUL-14 22:05:00 (CST-6)
Location: WADENA
Magnitude: 70.00 EG
Reported by: NWS Employee

In town a section of metal roofing was torn off the temporary community center and about two to three dozen trees were snapped or uprooted. Just outside of town, a section of an irrigation system was flipped and metal roofing was torn off of a couple of farm buildings.

Flash Flood in POLK, MINNESOTA
From 21-JUL-14 20:30:00 to 22-JUL-14 00:30:00 (CST-6)
Location: EAST GRAND FORKS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Two to four inches of rain fell in a little over an hour, flooding city streets and low lying areas.

Flash Flood in MARSHALL, MINNESOTA
From 21-JUL-14 22:00:00 to 22-JUL-14 05:00:00 (CST-6)
Location: ALVARADO
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Public

Street and basement flooding was reported.

Thunderstorm Wind in RED LAKE, MINNESOTA
From 21-JUL-14 20:35:00 to 21-JUL-14 20:35:00 (CST-6)
Location: RED LAKE FALLS
Magnitude: 65.00 EG
Reported by: Public

Multiple trees were blown down in Red Lake Falls, knocking out power to some areas.

Thunderstorm Wind in HUBBARD, MINNESOTA
From 21-JUL-14 21:45:00 to 21-JUL-14 21:45:00 (CST-6)
Location: KABEKONA CORNER
Magnitude: 65.00 EG
Reported by: Public

Trees were blown down.

Thunderstorm Wind in MARSHALL, MINNESOTA
From 21-JUL-14 20:21:00 to 21-JUL-14 20:21:00 (CST-6)
Location: ALVARADO
Magnitude: 60.00 EG
Reported by: Other Federal Agency

A river gaging station on the highway 1 bridge was damaged by the wind. The antenna had missing and bent tines.

Thunderstorm Wind in RED LAKE, MINNESOTA
From 21-JUL-14 20:22:00 to 21-JUL-14 20:22:00 (CST-6)
Location: DOROTHY
Magnitude: 60.00 EG
Reported by: Law Enforcement

Several four to six inch diameter tree branches were broken down in shelterbelts.

Thunderstorm Wind in POLK, MINNESOTA
From 21-JUL-14 20:32:00 to 21-JUL-14 20:32:00 (CST-6)
Location: MAPLE BAY
Magnitude: 70.00 EG
Reported by: Trained Spotter

Numerous large tree branches and limbs were broken down across Maple Lake and Mentor.

Thunderstorm Wind in POLK, MINNESOTA
From 21-JUL-14 20:10:00 to 21-JUL-14 20:10:00 (CST-6)
Location: CROOKSTON
Magnitude: 70.00 MG
Reported by: Broadcast Media

A personal weather station recorded a wind gust of 80 mph. The strong winds wrecked havoc on the trees in the city of Crookston.

Thunderstorm Wind in NORMAN, MINNESOTA
From 21-JUL-14 20:15:00 to 21-JUL-14 20:15:00 (CST-6)
Location: LOCKHART
Magnitude: 60.00 EG
Reported by: Emergency Manager

Several large tree branches and limbs were broken down across Goodhope and Lockhart townships.

Thunderstorm Wind in POLK, MINNESOTA
From 21-JUL-14 20:20:00 to 21-JUL-14 20:20:00 (CST-6)
Location: GENTILLY
Magnitude: 70.00 EG
Reported by: Public

Tree branches were blown down and a storm window was blown off a house.

Flash Flood in PENNINGTON, MINNESOTA
From 21-JUL-14 22:00:00 to 22-JUL-14 05:00:00 (CST-6)
Location: THIEF RIVER FALLS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Over two inches of rain fell in an hour, which caused street flooding throughout the city.

Hail in ROSEAU, MINNESOTA
From 21-JUL-14 19:37:00 to 21-JUL-14 19:37:00 (CST-6)
Location: GREENBUSH ARPT
Magnitude: 0.88 
Reported by: Trained Spotter

The hail was accompanied by very heavy rain which led to ponding water.

Funnel Cloud in POLK, MINNESOTA
From 21-JUL-14 19:55:00 to 21-JUL-14 19:55:00 (CST-6)
Location: GIRARD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A funnel cloud descended and then ascended from a rotating wall cloud.

Tornado in POLK, MINNESOTA
From 21-JUL-14 19:52:00 to 21-JUL-14 20:22:00 (CST-6)
Location: ELDRED
Tornado F-scale: EF2
Reported by: NWS Storm Survey

The tornado, which was wrapped in heavy rains and damaging downburst winds, tracked from near Eldred, through the south side of Crookston, through Gentilly, where it crossed into Red Lake County and ended about eight miles east-southeast of Red Lake Falls. The tornado snapped or uprooted numerous trees along its path, tore sections of roofing off of buildings and residences, tumbled empty rail cars, and snapped power poles along its nearly 38 mile path (about 25 miles in Polk County). Peak winds were estimated at 120 mph.

Tornado in RED LAKE, MINNESOTA
From 21-JUL-14 20:22:00 to 21-JUL-14 20:35:00 (CST-6)
Location: PERAULT
Tornado F-scale: EF2
Reported by: NWS Storm Survey

This tornado began near Eldred, in Polk County, at 1952 CST. From Eldred, it tracked across the south side of Crookston, through Gentilly, where it crossed into Red Lake County about four miles east-northeast of Gentilly. From this point it continued east-northeast to a point about eight miles east-southeast of Red Lake Falls. The total track length was about 38 miles, with about 13 miles of the total in Red Lake County. The tornado was wrapped in heavy rains and damaging downburst winds and it snapped or uprooted numerous trees along its path, tore sections of roofing off of buildings and residences, tumbled empty rail cars, and snapped power poles. Peak winds were estimated at 120 mph.