Updated 29 August 2003. Comments to Harold Brooks)
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.