Thunderstorms developed ahead of a cold front moving across northern Minnesota during the afternoon hours of the 5th. Storms along the Iron Range of northeastern Minnesota were quite strong and produced damaging winds from the Hibbing area northeast to the Isabella area. Widespread tree damage was observed along with concentrated corridors of more significant damage. NWS meteorologists performed a storm survey of the hardest hit areas near Aurora and Hoyt Lakes and found damage indicative of straight line winds in excess of 90 mph. Additional storms were seen elsewhere across the region that produced minor tree damage and marginally severe hail.

Thunderstorm Wind in AITKIN, MINNESOTA
From 05-SEP-23 16:50:00 to 05-SEP-23 16:52:00 (CST-6)
Location: GLORY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Photos were received showing four pine tree trunks that had been snapped about halfway up. The trees were estimated to be about one foot in diameter.

Thunderstorm Wind in LAKE, MINNESOTA
From 05-SEP-23 15:45:00 to 05-SEP-23 15:47:00 (CST-6)
Location: FOREST CENTER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A photo was received showing a large tree snapped and multiple other trees down around a campsite.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:32:00 to 05-SEP-23 14:34:00 (CST-6)
Location: POLO
Magnitude: 61.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Vinyl siding was peeled off of a garage by the storm.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:32:00 to 05-SEP-23 14:34:00 (CST-6)
Location: POLO
Magnitude: 76.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Multiple 12 to 18 inch pine trees were snapped at the location. The diameter was estimated from photos taken during the survey.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:31:00 to 05-SEP-23 14:33:00 (CST-6)
Location: POLO
Magnitude: 93.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Numerous 12 inch plus diameter pine trees were snapped or uprooted at the location with one of the trees falling on an outbuilding. The tree diameter was estimated from photos taken during the survey.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:42:00 to 05-SEP-23 14:44:00 (CST-6)
Location: ALLEN
Magnitude: 82.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A large evergreen tree was uprooted and fell onto a garage. The estimated diameter of the tree was 14 to 18 inches based on photos taken on the scene.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:43:00 to 05-SEP-23 14:45:00 (CST-6)
Location: ALLEN
Magnitude: 81.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Multiple eight to 12 inch diameter pine trees were uprooted with the diameter of the trees estimated by photos taken on site.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:45:00 to 05-SEP-23 14:47:00 (CST-6)
Location: ALLEN
Magnitude: 78.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Multiple eight to ten inch pine and aspen trees were snapped or uprooted with the diameter estimated by photos taken during the survey.

Thunderstorm Wind in LAKE, MINNESOTA
From 05-SEP-23 15:25:00 to 05-SEP-23 15:27:00 (CST-6)
Location: SAWBILL LNDG
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Many large trees were snapped off ten feet above the ground with trees nearby uprooted in areas with thin or wet soils. One tree limb was through the metal roof of a cabin.

Thunderstorm Wind in LAKE, MINNESOTA
From 05-SEP-23 15:25:00 to 05-SEP-23 15:27:00 (CST-6)
Location: SAWBILL LNDG
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large trees were snapped and a 24 inch diameter tree was uprooted.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:30:00 to 05-SEP-23 14:32:00 (CST-6)
Location: POLO
Magnitude: 65.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Numerous trees were uprooted or snapped off along Bass Lake Road. One of the trees fell onto an RV causing extensive damage to the RV.

Hail in CROW WING, MINNESOTA
From 05-SEP-23 15:25:00 to 05-SEP-23 15:27:00 (CST-6)
Location: CROW WING
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:50:00 to 05-SEP-23 14:52:00 (CST-6)
Location: ALLEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CASS, MINNESOTA
From 05-SEP-23 15:51:00 to 05-SEP-23 15:52:00 (CST-6)
Location: LAKE SHR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in AITKIN, MINNESOTA
From 05-SEP-23 17:02:00 to 05-SEP-23 17:04:00 (CST-6)
Location: THORP
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CROW WING, MINNESOTA
From 05-SEP-23 15:11:00 to 05-SEP-23 15:13:00 (CST-6)
Location: FT RIPLEY
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in AITKIN, MINNESOTA
From 05-SEP-23 17:26:00 to 05-SEP-23 17:27:00 (CST-6)
Location: EAST LAKE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in AITKIN, MINNESOTA
From 05-SEP-23 17:05:00 to 05-SEP-23 17:07:00 (CST-6)
Location: THORP
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in AITKIN, MINNESOTA
From 05-SEP-23 17:22:00 to 05-SEP-23 17:24:00 (CST-6)
Location: MC GREGOR
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:40:00 to 05-SEP-23 14:42:00 (CST-6)
Location: ALLEN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Photos were received of large tree limbs at least two feet in diameter down in Hoyt Lakes.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 13:56:00 to 05-SEP-23 13:58:00 (CST-6)
Location: SPRUCE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were down onto power lines just off County Road 7 near Old Mesaba and Ramshaw roads and the CN Railroad tracks. Tree limbs ranged in diameter from 4 to 12 inches and were broken about 20 feet off the ground. The trees were a mix of popples, pines and maples.

Thunderstorm Wind in LAKE, MINNESOTA
From 05-SEP-23 15:38:00 to 05-SEP-23 15:40:00 (CST-6)
Location: FOREST CENTER
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous trees were reported down on Boga Lake in the Boundary Waters Canoe Area Wilderness.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:30:00 to 05-SEP-23 14:32:00 (CST-6)
Location: MAKINEN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Photos were received showing several small to medium sized trees that were down along with power lines down as well.

Thunderstorm Wind in COOK, MINNESOTA
From 05-SEP-23 17:35:00 to 05-SEP-23 17:37:00 (CST-6)
Location: HOVLAND
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple large trees were down and the power was out.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 05-SEP-23 14:20:00 to 05-SEP-23 14:22:00 (CST-6)
Location: POLO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong winds with the storms knocked down several trees along Vermilion Trail.

Thunderstorm Wind in AITKIN, MINNESOTA
From 05-SEP-23 16:43:00 to 05-SEP-23 16:44:00 (CST-6)
Location: GLORY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Photos were received of several trees that were snapped off.

Thunderstorm Wind in LAKE, MINNESOTA
From 05-SEP-23 15:17:00 to 05-SEP-23 15:19:00 (CST-6)
Location: SAWBILL LNDG
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

The storm blew the top off of a white pine tree and the spotters location.