Updated 29 August 2003.  Comments to Harold Brooks)


Time Series of Annual Cycle of Tornado, Wind, and Hail Probability


Click anywhere in the contiguous United States to see the annual cycle of probability of tornadoes, wind, or hail at that location. The lines on each graph correspond to a specific time period indicated by the legend on the right. The black line is always the average of all the time periods. Remember, the definition of the event is one or more of the specified events (tornado, wind or hail) occurring during a 24-hour period.

Select one:
Tornado Wind Hail
Significant Tornado (F2+) Violent Tornado (F4+)
Then click on the map below:

Weather Type and Max Scale Values
Tornado
Significant Tornado
Violent Tornado
Wind
Hail
0.5% or 2.5%
0.6%
0.1%
0.5%, 2.5%, or 10%
0.5%, 2.5%, or 10%


Back To Severe Weather Climatology


Programming and graph design done by Dr. Harold Brooks, Daphne Zaras, Nathan Blais, and Brad Flickinger.