AnalysisWire is scrutinizing tornado data for useful insights for our readers. As we develop indices and other measures, we will expand upon the details below.
The Enhanced Fujita Scale started being used in February 2007. For consistency, only data during the time period in which the Enhanced Fujita Scale is in effect is used.
Note: Tornado data is close to, but not identical to, the totals reported by NOAA. We believe that we are using the data found here accurately, and we believe that any differences are immaterial.