Early fall means steam devils. When waters are still warm, but morning air is growing frigid, little tornadoes of steam can form on lake surfaces. Storm chaser Andrew Pritchard of DeKalb, Illinois captured the ephemeral twisters on the surface of Deep Lake, Wisconsin on Oct. 2.
“With the first freeze of the season,” Pritchard wrote on <a href="https://prairiestorm.blogspot.com/"
Steam devils form the same way dust devils, water spout tornadoes or land spout tornadoes do, but on a smaller scale. “Light winds blowing across the lake surface created little areas of vorticity, which were stretched by updrafts into tall and tight circulation patterns,” Pritchard wrote. “Pretty mesmerizing stuff to watch as they really do resemble little water spouts.”
Video credit: Andrew Pritchard, Prairiestorm Media
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Authors: Lisa Grossman
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