Time Series of Tornado, Wind, and Hail Probability
http://www.nssl.noaa.gov/hazard/hazardmap.html

Harold Brooks, Daphne Zaras, Nathan Blais, Brad Flickinger, National Severe Storm Laboratory

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An interactive United States map that generates graphs illustrating the seasonal probabilities of tornados for locations across the US. The graphs illustrate the average likelihood of tornados over a 75-year period, along with the changing probability of tornados over 15-year periods from 1921 to 1995. By clicking the appropriate map region, graphs can be generated for specific locations within the US.

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Keywords: tornado, cyclone, twister, wind, hail, tornado probability, seasonal weather, map, interactive