A strong cold front pushed across Minnesota the evening of the 14th and led to the development of a line of storms ahead of the front. As the storms pushed across northeastern Minnesota, they produced all modes of severe weather. Heavy rainfall led to areas of flash flooding, mainly along the western Iron Range. The bulk of the severe reports consisted of damaging wind gusts that brought down numerous trees, leading to damage at homes and other buildings. Additionally, a few brief, weak tornadoes were embedded in a section of the line that surged out over Aitkin and Carlton counties. These tornadoes produced further damage to trees and properties, mainly embedded within larger areas of wind damage.

Flash Flood in ST. LOUIS, MINNESOTA
From 14-AUG-20 18:50:00 to 14-AUG-20 21:00:00 (CST-6)
Location: HIBBING
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous reports of flooded roadways were received in Hibbing along US 169 along with many city streets as well.

Flash Flood in ITASCA, MINNESOTA
From 14-AUG-20 19:00:00 to 14-AUG-20 21:00:00 (CST-6)
Location: MARBLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A culvert was washed out on County Road 69 near Birch Drive south of Marble leading to the closure of CR 69.

Flash Flood in ITASCA, MINNESOTA
From 14-AUG-20 19:00:00 to 14-AUG-20 20:30:00 (CST-6)
Location: KEEWATIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous reports of 9 to 12 inches of standing water on roadways in Keewatin were received along with other reports of flooding in several locations in town.

Hail in ITASCA, MINNESOTA
From 14-AUG-20 17:23:00 to 14-AUG-20 17:24:00 (CST-6)
Location: GRAND RAPIDS ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ITASCA, MINNESOTA
From 14-AUG-20 17:23:00 to 14-AUG-20 17:25:00 (CST-6)
Location: GRAND RAPIDS ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flash Flood in ITASCA, MINNESOTA
From 14-AUG-20 19:03:00 to 14-AUG-20 21:00:00 (CST-6)
Location: NASHWAUK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water to a depth of 4 feet was over Pearson Avenue in Nashwauk resulting in the closure of the road.

Flash Flood in ITASCA, MINNESOTA
From 14-AUG-20 19:51:00 to 14-AUG-20 21:00:00 (CST-6)
Location: (GPZ)GRAND RAPIDS AR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Water was running over Sunny Beach Road and undermining the blacktop in the process.

Flash Flood in AITKIN, MINNESOTA
From 14-AUG-20 18:06:00 to 14-AUG-20 20:00:00 (CST-6)
Location: LAWLER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few culverts were washed out in the Lawler area leading to road closures.

Thunderstorm Wind in AITKIN, MINNESOTA
From 14-AUG-20 17:22:00 to 14-AUG-20 17:24:00 (CST-6)
Location: MINNEWAWA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Many trees were downed, boat docks were damaged and power lines were downed by the wind near Big Sandy Lake.

Thunderstorm Wind in ITASCA, MINNESOTA
From 14-AUG-20 17:34:00 to 14-AUG-20 17:36:00 (CST-6)
Location: TACONITE JCT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several trees were downed at the Trout Lake Campground near Grand Rapids.

Thunderstorm Wind in AITKIN, MINNESOTA
From 14-AUG-20 17:42:00 to 14-AUG-20 17:44:00 (CST-6)
Location: HILL CITY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Some minor tree damage was reported in the Hill City area.

Thunderstorm Wind in PINE, MINNESOTA
From 14-AUG-20 18:00:00 to 14-AUG-20 18:02:00 (CST-6)
Location: FINLAYSON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees were downed in Finlayson by the storm. The trees were mostly dead birch and tamarack, but a few live popple trees were uprooted as well.

Thunderstorm Wind in PINE, MINNESOTA
From 14-AUG-20 18:02:00 to 14-AUG-20 18:04:00 (CST-6)
Location: SANDSTONE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several 3 to 5 inch diameter trees were broken by the storm.

Thunderstorm Wind in PINE, MINNESOTA
From 14-AUG-20 18:04:00 to 14-AUG-20 18:06:00 (CST-6)
Location: SANDSTONE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A ten inch diameter tree was broken by the storm.

Thunderstorm Wind in PINE, MINNESOTA
From 14-AUG-20 18:10:00 to 14-AUG-20 18:12:00 (CST-6)
Location: STURGEON LAKE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees were down in Sturgeon Lake.

Thunderstorm Wind in PINE, MINNESOTA
From 14-AUG-20 18:14:00 to 14-AUG-20 18:16:00 (CST-6)
Location: KERRICK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree fell onto a cabin with lots of additional tree damage around the property as well.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 18:16:00 to 14-AUG-20 18:18:00 (CST-6)
Location: FRASER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Power lines were down into trees resulting in smoldering limbs.

Thunderstorm Wind in CARLTON, MINNESOTA
From 14-AUG-20 18:45:00 to 14-AUG-20 18:47:00 (CST-6)
Location: SCOTTS CORNER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A power line was downed by the storm.

Thunderstorm Wind in CARLTON, MINNESOTA
From 14-AUG-20 18:45:00 to 14-AUG-20 18:47:00 (CST-6)
Location: THOMSON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A pine tree was down across Minnesota Highway 210.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 18:57:00 to 14-AUG-20 18:59:00 (CST-6)
Location: MISSABE JCT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A string of loaded double stack container railroad cars were blown over on the south side of the Duluth Port Terminal.

Tornado in CARLTON, MINNESOTA
From 14-AUG-20 18:10:00 to 14-AUG-20 18:13:00 (CST-6)
Location: MOOSE LAKE MUNI ARPT
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado tracked north-northwest west of Moose Lake, MN, embedded within a line of thunderstorms. This tornado produced the most significant damage of this severe weather event, damaging multiple properties including lifting the roof off of a two-car garage and destroying at least one metal shed building. There were also pockets of tree damage along the path of the tornado, with numerous trees snapped 10-20 feet above the ground. Damage was strewn across fields, with several two-by-fours driven into the Earth.

Thunderstorm Wind in CROW WING, MINNESOTA
From 14-AUG-20 16:46:00 to 14-AUG-20 16:50:00 (CST-6)
Location: MANHATTAN BEACH
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Approximately 15 acres worth of trees were downed or heavily damaged on the south side of Fifty Lake. Photos showed that all trees were downed or bent over in the same direction.

Flash Flood in CASS, MINNESOTA
From 14-AUG-20 17:20:00 to 14-AUG-20 19:00:00 (CST-6)
Location: REMER MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was across State Highway 6 adjacent to Willow Lake.

Flash Flood in ITASCA, MINNESOTA
From 14-AUG-20 17:39:00 to 14-AUG-20 19:30:00 (CST-6)
Location: LA PRAIRIE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Two feet of water was covering US Highway 169 in the vicinity of Glenwood Drive causing the road to be closed.

Flash Flood in ITASCA, MINNESOTA
From 14-AUG-20 17:57:00 to 14-AUG-20 19:30:00 (CST-6)
Location: GRAND RAPIDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple areas of flooding were reported in and near downtown Grand Rapids along US 169 and NE 5th St.

Tornado in AITKIN, MINNESOTA
From 14-AUG-20 17:57:00 to 14-AUG-20 18:08:00 (CST-6)
Location: LAWLER
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down in a stand of trees south of 360th Street
approximately 1.5 miles SW of Lawler, MN, at 6:57 PM CDT. It tracked
north-northeast across 360th Street breaking and uprooting trees. The
tornado then tracked over a homestead on Kestrel Avenue approximately
1 mile north of Lawler doing damage to trees, an electrical pole, and
some outbuildings.

Tornado in CARLTON, MINNESOTA
From 14-AUG-20 18:12:00 to 14-AUG-20 18:15:00 (CST-6)
Location: AUTOMBA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief radar-confirmed tornado produced a two mile swath of tree damage across mainly forested areas near Automba. No property damage reports were received. The damage path was estimated using satellite imagery and the rating was determined based on other similar damage reports from this event.

Thunderstorm Wind in CROW WING, MINNESOTA
From 14-AUG-20 16:33:00 to 14-AUG-20 16:35:00 (CST-6)
Location: MANHATTAN BEACH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were reported down by law enforcement.

Thunderstorm Wind in AITKIN, MINNESOTA
From 14-AUG-20 17:48:00 to 14-AUG-20 17:50:00 (CST-6)
Location: GIESE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple docks were flipped over near Giese by the strong winds.

Thunderstorm Wind in PINE, MINNESOTA
From 14-AUG-20 17:58:00 to 14-AUG-20 18:00:00 (CST-6)
Location: GRONINGEN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Part of a metal roof was peeled off a house by the strong winds with additional damage to a barn near the intersection of Groningen Road and Fox Road.

Thunderstorm Wind in PINE, MINNESOTA
From 14-AUG-20 18:00:00 to 14-AUG-20 18:02:00 (CST-6)
Location: GRONINGEN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown down and blocking a driveway.

Thunderstorm Wind in PINE, MINNESOTA
From 14-AUG-20 18:04:00 to 14-AUG-20 18:06:00 (CST-6)
Location: RUTLEDGE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees were falling along Minnesota 61 as the spotter was driving between Willow River and Rutledge.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 18:04:00 to 14-AUG-20 18:06:00 (CST-6)
Location: HIBBING
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A few trees were down in Hibbing with at least one partially blocking a street.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 18:05:00 to 14-AUG-20 18:07:00 (CST-6)
Location: HIBBING
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A power line was downed during the storm and laying across a portion of Townline Road.

Thunderstorm Wind in PINE, MINNESOTA
From 14-AUG-20 18:20:00 to 14-AUG-20 18:22:00 (CST-6)
Location: DUQUETTE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was downed onto a power line.

Thunderstorm Wind in CARLTON, MINNESOTA
From 14-AUG-20 18:25:00 to 14-AUG-20 18:27:00 (CST-6)
Location: MOOSE LAKE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A power line was downed and in a ditch.

Thunderstorm Wind in CARLTON, MINNESOTA
From 14-AUG-20 18:35:00 to 14-AUG-20 18:37:00 (CST-6)
Location: BLACKHOOF
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees were uprooted by the storm.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 18:58:00 to 14-AUG-20 19:00:00 (CST-6)
Location: MUNGER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was blown down onto a power line in Solway Township.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 19:00:00 to 14-AUG-20 19:02:00 (CST-6)
Location: ENDION
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown down onto a power line on East 1st Street and the tree was on fire.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 19:00:00 to 14-AUG-20 19:02:00 (CST-6)
Location: HUNTERS PARK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A large tree was downed onto a power line on Tioga Street and was on fire.

Thunderstorm Wind in CARLTON, MINNESOTA
From 14-AUG-20 18:35:00 to 14-AUG-20 18:37:00 (CST-6)
Location: SCOTTS CORNER
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Over 100 trees were downed by the storm with trees stacked up on each other.

Thunderstorm Wind in CARLTON, MINNESOTA
From 14-AUG-20 18:41:00 to 14-AUG-20 18:43:00 (CST-6)
Location: ESKO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was downed onto a road in Jay Cooke State Park.

Thunderstorm Wind in CARLTON, MINNESOTA
From 14-AUG-20 18:42:00 to 14-AUG-20 18:44:00 (CST-6)
Location: SCOTTS CORNER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A power line was down and across the road.

Thunderstorm Wind in CARLTON, MINNESOTA
From 14-AUG-20 18:45:00 to 14-AUG-20 18:47:00 (CST-6)
Location: BLACKHOOF
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was down across a road.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 19:02:00 to 14-AUG-20 19:04:00 (CST-6)
Location: DULUTH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Metal roof sheeting was partially removed from a building and was dangling in the vicinity of power lines.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 19:13:00 to 14-AUG-20 19:15:00 (CST-6)
Location: FRENCH RIVER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was leaning against a power line along Lismore Road in Normanna Township.

Thunderstorm Wind in ST. LOUIS, MINNESOTA
From 14-AUG-20 19:22:00 to 14-AUG-20 19:24:00 (CST-6)
Location: PALMERS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed onto a power line along Homestead Road in Clifton Township.