National Weather Service United States Department of Commerce

Lala Impacting Hawaii; Severe Thunderstorm and Flash Flooding Risks; Excessive Heat

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorm, heavy rainfall, and flash flooding threats continue from the Midwest to the Mid-Atlantic and across the central High Plains. Record heat continues for areas of the central/southern Plain into the Southeast Read More >

Overview

A surface boundary extended from southern Minnesota into northeast Iowa on Wednesday, June 17th. Warm and moist air pooled up to this boundary, leading to shower and thunderstorm development by early evening. The atmosphere was unstable enough and wind shear was favorable for storms to become severe very rapidly, producing large hail and even a couple tornadoes. The confirmed tornadoes were located in Mower County, Minnesota - in and around Austin (damage path) and several miles west of LeRoy, MN.

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Radar loop of the Austin, MN tornado
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