If you're not sure what you should do for a tornado warning vs. a tornado watch, here's the difference between these two terms — and why that matters. Scopes trial could have happened anywhere.

It's getting more common for a lot of tornadoes to form over a big area in a short period of time. But the total number of tornadoes each year in the U.S. is stable.

A tornado watch is in effect through 8 p.m. for parts of West Virginia, Virginia and North Carolina. Southwest North Carolina to eastern Alabama is under a severe thunderstorm watch through 8 p.m.

A violent, tornado-spawning storm system tore across the central US, leaving at least 25 people dead in Missouri and southeastern Kentucky as it cut a path of destruction through several states.