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Tornadoes are nature's most violent storms. A tornado is a violent windstorm characterized by a twisting, funnel-shaped cloud. A tornado is produced when cool air overrides a layer of warm air, forcing the warm air to rise rapidly. The damage from a tornado is a result of the high wind velocity and wind-blown debris. Tornado season is generally March through August, although tornadoes can occur at any time of year.
It is important to be aware of the severe weather advisories that are issued by the National Weather Service, including tornado watches and warnings. Severe thunderstorm advisories are also important because thunderstorms can generate tornadoes. Remain alert to signs of an approaching tornado and seek shelter if threatening conditions exist.
TORNADO WARNING: A tornado has been sighted or indicated by weather radar. If a tornado warning is issued for your area and the sky becomes threatening, move to your predesignated place of safety.
TORNADO WATCH: Tornadoes are possible in your area. Remain alert for approaching storms.
FEMA: Tornado
Ready.gov: Tornadoes
NOAA: Severe Weather
American Red Cross: Prepare for Tornadoes