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  • How common are December tornadoes in the US and why are they so dangerous?

    Atmospheric sciences professor and department head (Robert) Jeff Trapp

    Even though December tornadoes are rare, they pose a significant threat because of their unexpectedness and tendency to occur after sunset while people are at home sleeping, unaware of the impending danger, says University of Illinois atmospheric sciences professor and department head (Robert) Jeff Trapp.

    Photo by L. Brian Stauffer

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  • Editor’s notes:

    To reach Jeff Trapp, call 217-300-0967; jtrapp@illinois.edu.