On Friday, June 21st and Saturday, June 22nd, a significant severe weather outbreak occurred across the Tri-State region. Between both days, 37 reports of severe weather were reported including 23 reports of hail ranging from 1.00" - 2.00" in diameter, five reports of hail greater than 2.00", one report of winds over 60 MPH and 8 tornadoes. The largest hail size reported came from Wheatland, WY with a hail stone that was 4.25" in diameter, just slightly smaller than a softball!
The worst of the two day out break was Saturday, June 22nd when six of the eight tornadoes were reported. One of those tornadoes occurred over Banner County in Nebraska. The National Weather Service (NWS) rated this tornado an EF-1 with maximum winds of 100 MPH. According to the NWS, the tornado developed 17 miles WNW of Harrisburg at 4:50 PM and lifted 15 minutes later 10 miles NW of Harrisburg. The tornado tracked over an estimated distance of 7.8 miles with a damage path width of 100 yards.
According to the NWS, eight structures were damaged with at least one outbuilding destroyed. Included in these damaged structures was a 3 stall garage that lost its roof with the walls remaining intact. A two story house received damage from flying debris with 2x4s driven through a wall from the tornado's strong winds. Six power poles were damaged near the area where the tornado developed while several hard wood trees that varied from 6-12 inches in diameter were snapped.
Tornados also touched down near Wheatland, Veteran and La Grange, Wyoming and east of Harrisburg, Nebraska on Saturday. Damage surveys from these tornadoes have not been done yet. Two other tornadoes were reported the day before near Potter and Sidney, Nebraska. No damage was reported from those tornadoes.