Are there any common misconceptions about tornadoes?

Do not open a window to try to “equalize the pressure.” Doing so may actually pressurize the house and can cause the roof to be torn off. Also, underst and that tornadoes are not always visible from a distance; rely on a weather radio as an information resource. Although tornadoes are usually spawned by thunderstorms, they have been known to occur without lightning. They can cross a river or another body of water. Finally, tornadoes are not confined to “tornado alley.” Tornadoes can occur anywhere, at any time.