Tornado.
Tornado.
Pressure trace showing the passage of a tornado.
Weather observations showing the passage of a tornado at a station in Oklahoma (24 May 2011).
Visible and infrared satellite image of a tornadic thunderstorm.
Supercell schematic.
Radar hook echo.
Tornado alley.
Tornadoes are most likely in late afternoon.
Tornadoes are most likely in Spring.
YouTube tornado video
YouTube tornado video
(best: 4:10-5:10)