Significant Tornadoes 1974-2022 chronicles every "significant" tornado (F2 or EF2 and above) that has struck in the United States during those years. It lists the state where each tornado has hit, date, time, death and injury total, path length, and the F/EF scale rating. This is followed by a description of the event. We have gleaned information from NWS surveys, hundreds of journal papers, tv stations, online blogs and newspaper sites. The total descriptions add up to 6598 tornadoes, 710 pages, and 647 figures.

The "outbreaks" section defines an outbreak in a unique way. With its OIS (Outbreak Intensity Score) we will make it clear that the exact number of deaths has little meteorological importance. Surely we understand the tragic circumstances involved, no matter the number of people killed or injured. We will list those totals, but not use them in any calculation. But we believe that the effects of the outbreak is more a matter of chance, timing, and location.

To understand how outbreaks are involved with climate change, its intensity estimate and season of the year are meteorologically the most important. The top 200+ outbreaks reveals some surprises.

The UPS delivery system receivers, loaders, and drivers end their voting on a new contract on August 22. That is the likely date when we will activate the links on this page and begin to take orders. As noted on Twitter, the books are initially shipped UPS from Ohio to Vermont.