Calculating Total Annual Threat

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Tornado Cycle, Norman, Oklahoma

Below is the tornado cycle for Norman, Oklahoma. The black line is the average for all 4 five-year periods.

And this is the cycle for Camilla County, Georgia:

These cycles are very different but the total threat in Camilla County, GA is about half that for Norman, OK. Surprising? Have students calculate the area under the black curve.

Last updated: March 27, 2002
Created by: DSZ