This page is a handy resource with links to various data sets, where data in Tornado Archive came from (Or may direct you toward), and other resources.
StormTrack, A 40+ year old organization for Storm Chasers
USTornadoes; a wealth of resources and case studies. Write ups on past tornado events and more!
TornadoTalk; A website dedicated to historical tornado information.
Storm Prediction Center “Event Archive”
The SPC “Violent Tornado Page”
SPC Dataset (A Raw CSV File of Tornadoes 1950-2019)
Thomas P. Grazulis’ “Significant Tornadoes 1880-1989”
Historic US Tornado Data (Pre-1960)
Brett Roberts’ website; an environment browser, chase season rankings, and some climo tools