A very moist and unstable airmass was in place ahead of a shortwave and low-level convergence moving into the area. This lead to storms during the afternoon and evening hours that produced numerous reports of downed trees and power lines due to strong winds along with small hail with the heaviest hit areas stretching from the Brainerd Lakes area to the Iron Range. Power outages from this event lasted for over a day in some areas following the storms.

Thunderstorm Wind in ITASCA, MINNESOTA
From 29-MAY-18 16:25:00 to 29-MAY-18 16:25:00 (CST-6)
Location: COHASSET
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 14 inch diameter maple tree was blown down.

Thunderstorm Wind in AITKIN, MINNESOTA
From 29-MAY-18 16:35:00 to 29-MAY-18 16:35:00 (CST-6)
Location: SHESHEBEE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous small trees were uprooted.

Hail in ST. LOUIS, MINNESOTA
From 29-MAY-18 18:09:00 to 29-MAY-18 18:10:00 (CST-6)
Location: TWIG
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in AITKIN, MINNESOTA
From 29-MAY-18 17:25:00 to 29-MAY-18 17:26:00 (CST-6)
Location: AITKIN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Nickel-size hail was reported on Wilkins Lake.

Thunderstorm Wind in CASS, MINNESOTA
From 29-MAY-18 15:32:00 to 29-MAY-18 15:32:00 (CST-6)
Location: WHIPHOLT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm winds blew down a few trees. One of the larger trees was 8 inches in diameter.

Thunderstorm Wind in CASS, MINNESOTA
From 29-MAY-18 16:02:00 to 29-MAY-18 16:02:00 (CST-6)
Location: BENA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm winds blew down trees with diameters up to 8 inches.

Thunderstorm Wind in ITASCA, MINNESOTA
From 29-MAY-18 16:15:00 to 29-MAY-18 16:15:00 (CST-6)
Location: COHASSET
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees, some blown down by gusty thunderstorm winds. Some of the downed trees  diameters up to 10.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 29-MAY-18 17:45:00 to 29-MAY-18 17:45:00 (CST-6)
Location: MARKHAM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees, a TV antenna and power lines were blown down by strong thunderstorm winds.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 29-MAY-18 17:24:00 to 29-MAY-18 17:24:00 (CST-6)
Location: HUNTERS PARK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A 12 to 18 inch diameter tree was down down by strong thunderstorm winds.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 29-MAY-18 17:45:00 to 29-MAY-18 17:45:00 (CST-6)
Location: BUHL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Four inch diameter trees were snapped by strong thunderstorm winds.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 29-MAY-18 18:00:00 to 29-MAY-18 18:00:00 (CST-6)
Location: BIWABIK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Four large trees were blown down. The roof and siding of a house was damaged when one of the trees fell on it.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 29-MAY-18 18:00:00 to 29-MAY-18 18:00:00 (CST-6)
Location: PARKVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Five large trees were blown down by strong thunderstorm winds. One tree was 1 foot in diameter and the others were around 5 inches in diameter.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 29-MAY-18 18:05:00 to 29-MAY-18 18:05:00 (CST-6)
Location: EMBARRASS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees and numerous branches were blown down in Embarrass.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 29-MAY-18 18:14:00 to 29-MAY-18 18:14:00 (CST-6)
Location: AURORA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees were blown down by thunderstorm winds in Aurora.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 29-MAY-18 18:30:00 to 29-MAY-18 18:30:00 (CST-6)
Location: ELY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm winds blew down several large trees and a few power lines.

Thunderstorm Wind in LAKE, MINNESOTA
From 29-MAY-18 19:00:00 to 29-MAY-18 19:00:00 (CST-6)
Location: ISABELLA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees blown down by strong thunderstorm winds.