Subatomic particles called muons could measure pressure changes in supercell thunderstorms and the twisters they kick up.

Fire tornadoes (or firenadoes) form due to two key factors. One factor is the combustion process that creates fire and releases large amounts heat. This heat release creates an updraft.

FOX 11 Los Angeles/YouTube A "fire tornado" was spotted among the flames ... which the Library of Congress says are "rare," form when strong winds mix with fire, ash and smoke.

Florida's statewide tornado drill is scheduled to start at 10 a.m. on Wednesday, Feb. 5. The drill is expected to end no later than 10:30 a.m. It's a good idea to take advantage of Wednesday's drill ...