A tornado is the world’s most violent storm and can devastate a community in seconds. A tornado is a funnel-shaped cloud that drops from a thunderstorm to the ground with winds up to 300 miles per hour. If you see a cloud of flying debris, there might be a tornado even if a funnel isn’t visible. When there's a tornado risk, the National Weather Service issues alerts.
Tornado Watch: severe thunderstorms and tornadoes are possible
Tornado Warning: a tornado is happening or about to happen. Seek shelter immediately