In the early morning hours of June 8th, 2011, the temperature rose from 85 degrees to 102 in 20 minutes. This spawned a 50 mph wind through the city around 12:22 AM.
The meteorological explanation was that rain falling cools the air beneath it. The colder air falls quickly and as it falls it's warmed and compressed quickly.
The pictures are from a co-workers house on the west side of Wichita. Neighbors shed was picked up by the wind and thrown at her house.