By the early evening of Thursday, August 13th, an area of surface low pressure had set up near Mayville, North Dakota. A warm front extended out to the east-southeast from the low. South of the warm front, temperatures were in the mid to upper 80s, with dew points in the lower 70s. Thunderstorms broke out along and north of the warm front, producing large hail, damaging wind gusts, and two tornadoes.

Thunderstorm Wind in POLK, MINNESOTA
From 13-AUG-20 20:39:00 to 13-AUG-20 20:39:00 (CST-6)
Location: FOSSTON
Magnitude: 52.00 EG
Reported by: Public

Several 4 to 6 inch diameter branches were blown down.

Hail in WILKIN, MINNESOTA
From 13-AUG-20 21:44:00 to 13-AUG-20 21:44:00 (CST-6)
Location: WOLVERTON
Magnitude: 1.00 
Reported by: Trained Spotter

Dime to quarter sized hail fell.

Hail in CLEARWATER, MINNESOTA
From 13-AUG-20 22:00:00 to 13-AUG-20 22:00:00 (CST-6)
Location: EBRO
Magnitude: 1.00 
Reported by: Public

The hail fell near the Shooting Star Casino.

Thunderstorm Wind in CLEARWATER, MINNESOTA
From 13-AUG-20 21:10:00 to 13-AUG-20 21:10:00 (CST-6)
Location: LEONARD
Magnitude: 65.00 EG
Reported by: Social Media

Multiple trees were blown down, one falling on a house. A garage and barn were also damaged.

Thunderstorm Wind in MAHNOMEN, MINNESOTA
From 13-AUG-20 21:39:00 to 13-AUG-20 21:39:00 (CST-6)
Location: BEJOU
Magnitude: 61.00 EG
Reported by: Public

A few trees were snapped in a shelterbelt.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 13-AUG-20 22:11:00 to 13-AUG-20 22:11:00 (CST-6)
Location: KELLIHER
Magnitude: 56.00 EG
Reported by: Emergency Manager

Scattered power outages were reported.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 13-AUG-20 21:40:00 to 13-AUG-20 21:40:00 (CST-6)
Location: NEBISH
Magnitude: 65.00 EG
Reported by: Social Media

A swath of trees and power poles were snapped between Redby and Puposky, causing widespread power outages.

Hail in MAHNOMEN, MINNESOTA
From 13-AUG-20 21:41:00 to 13-AUG-20 21:48:00 (CST-6)
Location: BEJOU
Magnitude: 0.88 
Reported by: Trained Spotter

Tornado in NORMAN, MINNESOTA
From 13-AUG-20 19:44:00 to 13-AUG-20 19:44:00 (CST-6)
Location: GARY
Tornado F-scale: EF0
Reported by: Storm Chaser

A brief touchdown was noted in pasture land east of highway 32 and just south of county road 15. Heavy rain quickly cut off the view of the storm. Peak winds were estimated at 70 mph.

Hail in PENNINGTON, MINNESOTA
From 13-AUG-20 18:48:00 to 13-AUG-20 18:48:00 (CST-6)
Location: HAZEL
Magnitude: 1.25 
Reported by: Broadcast Media

Large hail fell in east central Smiley Township.

Hail in PENNINGTON, MINNESOTA
From 13-AUG-20 19:10:00 to 13-AUG-20 19:10:00 (CST-6)
Location: MAVIE
Magnitude: 1.25 
Reported by: Social Media

Nickel to half dollar sized hail fell.

Tornado in PENNINGTON, MINNESOTA
From 13-AUG-20 19:04:00 to 13-AUG-20 19:12:00 (CST-6)
Location: HAZEL
Tornado F-scale: EF1
Reported by: Utility Company

A tornado knocked down several trees and branches in shelterbelts along its path. One power pole was snapped. The track was based on a combination of reports and satellite imagery. Peak winds were estimated at 90 mph.

Hail in PENNINGTON, MINNESOTA
From 13-AUG-20 19:19:00 to 13-AUG-20 19:19:00 (CST-6)
Location: MAVIE
Magnitude: 1.00 
Reported by: Public

Hail in POLK, MINNESOTA
From 13-AUG-20 19:20:00 to 13-AUG-20 19:20:00 (CST-6)
Location: BELTRAMI
Magnitude: 1.25 
Reported by: Social Media

Funnel Cloud in NORMAN, MINNESOTA
From 13-AUG-20 19:57:00 to 13-AUG-20 19:57:00 (CST-6)
Location: GARY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A rain wrapped funnel cloud was reported.

Hail in PENNINGTON, MINNESOTA
From 13-AUG-20 20:40:00 to 13-AUG-20 20:40:00 (CST-6)
Location: ST HILAIRE
Magnitude: 1.00 
Reported by: Public

Dime to quarter sized hail fell.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 13-AUG-20 21:15:00 to 13-AUG-20 21:15:00 (CST-6)
Location: PINEWOOD
Magnitude: 56.00 EG
Reported by: Social Media

A large tree was blown down.

Hail in POLK, MINNESOTA
From 13-AUG-20 19:30:00 to 13-AUG-20 19:30:00 (CST-6)
Location: FERTILE ARPT
Magnitude: 1.00 
Reported by: Public

Hail in RED LAKE, MINNESOTA
From 13-AUG-20 19:40:00 to 13-AUG-20 19:40:00 (CST-6)
Location: OKLEE
Magnitude: 1.00 
Reported by: Social Media

Dime to quarter sized hail fell.

Hail in NORMAN, MINNESOTA
From 13-AUG-20 19:43:00 to 13-AUG-20 19:43:00 (CST-6)
Location: ADA
Magnitude: 1.00 
Reported by: Social Media

Hail in CLAY, MINNESOTA
From 13-AUG-20 17:45:00 to 13-AUG-20 17:45:00 (CST-6)
Location: FELTON
Magnitude: 1.25 
Reported by: Broadcast Media

Hail in PENNINGTON, MINNESOTA
From 13-AUG-20 18:40:00 to 13-AUG-20 18:40:00 (CST-6)
Location: HIGH LNDG
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in PENNINGTON, MINNESOTA
From 13-AUG-20 18:46:00 to 13-AUG-20 18:46:00 (CST-6)
Location: (TVF)THIEF RVR FALLS
Magnitude: 1.00 
Reported by: Public

Dime to quarter sized hail fell.

Funnel Cloud in PENNINGTON, MINNESOTA
From 13-AUG-20 19:01:00 to 13-AUG-20 19:01:00 (CST-6)
Location: HAZEL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A persistent wall cloud with a funnel were reported.

Hail in NORMAN, MINNESOTA
From 13-AUG-20 17:50:00 to 13-AUG-20 17:50:00 (CST-6)
Location: SUNDAHL
Magnitude: 1.00 
Reported by: Broadcast Media

Hail in PENNINGTON, MINNESOTA
From 13-AUG-20 18:05:00 to 13-AUG-20 18:05:00 (CST-6)
Location: ST HILAIRE
Magnitude: 0.88 
Reported by: Social Media

Dime to nickel sized hail fell.

Hail in CLAY, MINNESOTA
From 13-AUG-20 17:30:00 to 13-AUG-20 17:30:00 (CST-6)
Location: FELTON
Magnitude: 0.75 
Reported by: Social Media

Hail in RED LAKE, MINNESOTA
From 13-AUG-20 18:25:00 to 13-AUG-20 18:25:00 (CST-6)
Location: OKLEE
Magnitude: 1.25 
Reported by: Public