T h e  B a d  We a t h e r  G r o u p

Tornados: Gallery (Click below)

What is a Tornado?

Dark, funnel-shaped cloud containing violently rotating air that develops within a heavy cumulonimbus cloud mass and extends to the earth. The diameter of a tornado varies from a few feet to a mile; the rotating winds reach velocities of 200 to 300 mph (320 to 480 km/hr), and the updraft at the center may reach 200 mph (320 km/hr). In comparison with a HURRICANE, a tornado covers a much smaller area but is much more violent and destructive. The atmospheric conditions required for the formation of a tornado include great thermal instability, high humidity, and the convergence of warm, moist air at low levels with cooler, drier air above. Tornadoes occurring over water are called waterspouts.

(Information from
www.encyclopedia.com)