Learn about tornadoes
Plain guides built on NOAA's record of 73,458 US tornadoes since 1950.
Watch vs warning
What each National Weather Service alert means and what to do.
The EF scale
How tornadoes are rated, EF0 to EF5, with real counts.
Tornado Alley
Where tornadoes hit most, and how that is moving east.
Emergency kit
An 18-item checklist that saves as you pack.
Tornado safety
What to do in a watch, a warning and a severe storm.