How Often Will Severe Weather Occur Near Me?

Risk From F4 and Greater Tornadoes

Now we're up to the really bad stuff - F4 and stronger tornadoes. These are also very rare, as you may have seen on the Tornado Project web site. And notice now the map is in days per millenium. The peak is 50-55 days/millenium in south central Oklahoma. Divide 1000 by 50 (or 55) to see that folks in south central Oklahoma can expect an F4 or stronger tornado within 25 miles of them about once every 20 years.

Extending this exercise

This exercise can be extended to include other graphics from the Total Threat section of the Severe Thunderstorm Climatology web site for F4 and greater, winds 50 kts or more, hail at least 3/4" diameter.

Last updated: March 25, 2002
Created by: DSZ