An area of low pressure and a cold front moved across the Northland on the afternoon and evening of the 18th. Ahead of the cold front, dew points surged into the 70s and, coupled with the cold front, led to the development of a few supercell thunderstorms that moved across the region. The storms developed over north-central Minnesota during the afternoon and pushed eastward through northwest Wisconsin during the evening hours producing damaging winds and large hail as they pushed across the area.

Thunderstorm Wind in BAYFIELD, WISCONSIN
From 18-JUL-20 20:17:00 to 18-JUL-20 20:20:00 (CST-6)
Location: RED CLIFF
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An area of approximately one half mile long of trees were blown down along Blueberry Road between Frog Bay Road and Emil Road.

Thunderstorm Wind in BAYFIELD, WISCONSIN
From 18-JUL-20 20:21:00 to 18-JUL-20 20:25:00 (CST-6)
Location: SAND BAY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees were down along a road and a road sign post was bent. Additionally, a section of pine trees were sheared off at the top.

Thunderstorm Wind in WASHBURN, WISCONSIN
From 18-JUL-20 20:48:00 to 18-JUL-20 20:50:00 (CST-6)
Location: TWIN OAKS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A boat and dock were pushed against the shore by the wind in addition to damaged trees.

Thunderstorm Wind in ASHLAND, WISCONSIN
From 18-JUL-20 21:15:00 to 18-JUL-20 21:18:00 (CST-6)
Location: AGNEW
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several white and red pine trees were damaged by the winds along with a spruce tree that was uprooted.

Thunderstorm Wind in BAYFIELD, WISCONSIN
From 18-JUL-20 20:51:00 to 18-JUL-20 20:51:00 (CST-6)
Location: BARNES
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A personal weather station near Barnes recorded a maximum gust of 59 mph during the storm.

Hail in BURNETT, WISCONSIN
From 18-JUL-20 19:50:00 to 18-JUL-20 19:52:00 (CST-6)
Location: SIREN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, WISCONSIN
From 18-JUL-20 19:50:00 to 18-JUL-20 19:53:00 (CST-6)
Location: DEDHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in DOUGLAS, WISCONSIN
From 18-JUL-20 20:03:00 to 18-JUL-20 20:05:00 (CST-6)
Location: DEDHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Thunderstorm Wind in BAYFIELD, WISCONSIN
From 18-JUL-20 20:14:00 to 18-JUL-20 20:19:00 (CST-6)
Location: SAND BAY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Widespread tree damage was reported along with downed trees blocking roads and taking down power lines along Big Sand Bay Road and Little Sand Bay Road.

Thunderstorm Wind in ASHLAND, WISCONSIN
From 18-JUL-20 21:12:00 to 18-JUL-20 21:14:00 (CST-6)
Location: MARENGO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A tree fell onto a power line during the storm.

Thunderstorm Wind in ASHLAND, WISCONSIN
From 18-JUL-20 21:15:00 to 18-JUL-20 21:17:00 (CST-6)
Location: MARENGO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A tree was downed onto a power line in Marengo.

Thunderstorm Wind in PRICE, WISCONSIN
From 18-JUL-20 23:03:00 to 18-JUL-20 23:05:00 (CST-6)
Location: PRICE CO ARPT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A tree fell onto power lines in the town of Phillips.

Thunderstorm Wind in BAYFIELD, WISCONSIN
From 18-JUL-20 20:05:00 to 18-JUL-20 20:07:00 (CST-6)
Location: CORNUCOPIA FLD ARPT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

A hiking trail was blocked due to downed trees.

Thunderstorm Wind in BAYFIELD, WISCONSIN
From 18-JUL-20 20:14:00 to 18-JUL-20 20:15:00 (CST-6)
Location: CORNUCOPIA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was downed by the storm.