Severe Weather 101
Questions and answers about weather phenomena, including tornadoes, thunderstorms, lightning, hail, floods, damaging winds and winter weather.
There can be as many as 40,000 thunderstorms each day around the world. They are the most common in the U.S., where they can produce tornadoes, floods, lightning and damaging winds.
Much about tornadoes remains a mystery. They are rare, unpredictable and deadly. The U.S. has more tornadoes than anywhere else in the world.
Except for heat-related fatalities, more deaths occur from flooding than any other weather-related hazard.
Lightning is one of the oldest observed natural phenomena on earth. At the same time, it also is one of the least understood.
Straight-line winds are responsible for most thunderstorm damage. These winds can cause as much damage as a tornado.