A significant event occurred during the daytime hours of May 19th, 2022 across Eastern Minnesota and Western Wisconsin. A wave of storms in the afternoon produced a long-track supercell with large hail and damaging wind over the Twin Cities metro and West Central Wisconsin. The synoptic setup included weak ridging and zonal flow in the Upper Midwest giving way to a deepening trough in the Pacific Northwest. A cold front was advancing eastward through the Dakotas. Over Iowa, a northward advancing warm front coupled with steep lapse rates in the mid levels (7.5-8��C/km) were able to drive development initially at the MN/IA border and eventually farther north into the Metro, then eastward. Upper-air soundings depicted a marginal environment for Supercell development with 50-60kt 0-6km shear and an elevated area of 1200 J/kg MUCAPE in the mid-levels. The SPC issued threat level for the day was slight to enhanced risk with most attention given to a significant hail potential.
The storms that developed in the mid-late afternoon over the Twin Cities metro area, moved into west central Wisconsin by the late afternoon and early evening. Several of the hailstones measured up to 2 inches in diameter and damaging winds occurred near Spring Valley and Elmwood.

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:13:00 to 19-MAY-22 15:13:00 (CST-6)
Location: HUDSON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:25:00 to 19-MAY-22 15:25:00 (CST-6)
Location: RIVER FALLS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:07:00 to 19-MAY-22 15:07:00 (CST-6)
Location: HOULTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:13:00 to 19-MAY-22 15:13:00 (CST-6)
Location: HUDSON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:18:00 to 19-MAY-22 15:18:00 (CST-6)
Location: HUDSON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:13:00 to 19-MAY-22 15:13:00 (CST-6)
Location: NORTH HUDSON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DUNN, WISCONSIN
From 19-MAY-22 16:00:00 to 19-MAY-22 16:00:00 (CST-6)
Location: CEDAR FALLS
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in DUNN, WISCONSIN
From 19-MAY-22 15:50:00 to 19-MAY-22 15:50:00 (CST-6)
Location: WESTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

There were over a dozen pine trees that were snapped off above the base, northwest of Weston. A few power poles were also broken. There were also unconfirmed reports of more trees and power lines down across southern Dunn County, but additional information was not available.

Thunderstorm Wind in PIERCE, WISCONSIN
From 19-MAY-22 16:47:00 to 19-MAY-22 16:47:00 (CST-6)
Location: ELMWOOD
Magnitude: 56.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

There was damage to a shed, barn and farm equipment near Elmwood.

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:15:00 to 19-MAY-22 15:20:00 (CST-6)
Location: BURKHARDT
Magnitude: 1.40 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A photo showed the lawn was mostly white with hail.

Hail in PIERCE, WISCONSIN
From 19-MAY-22 16:52:00 to 19-MAY-22 16:52:00 (CST-6)
Location: ESDAILE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PIERCE, WISCONSIN
From 19-MAY-22 15:40:00 to 19-MAY-22 15:50:00 (CST-6)
Location: MARTELL
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A ten mile long and three mile wide swath of damaging wind hit far northeast Pierce County. Several hundred trees were knocked down, with many across roads and power lines, and a few on houses and cars. A roof was partially blown off a house two miles southwest of Spring Valley. A barn was blown down four miles west-northwest of Spring Valley.

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:33:00 to 19-MAY-22 15:33:00 (CST-6)
Location: BALDWIN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:21:00 to 19-MAY-22 15:26:00 (CST-6)
Location: ROBERTS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:34:00 to 19-MAY-22 15:34:00 (CST-6)
Location: HAMMOND
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHIPPEWA, WISCONSIN
From 19-MAY-22 15:37:00 to 19-MAY-22 15:37:00 (CST-6)
Location: BATEMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CROIX, WISCONSIN
From 19-MAY-22 15:08:00 to 19-MAY-22 15:22:00 (CST-6)
Location: BURKHARDT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ground was mostly white with hail.