Infographic: Tornado! How, When & Where Twisters Form

Tornado season has arrived. Here's what you need to know about how tornadoes form, when and where they mostly occur, and how they are rated. [Related: Twisted Science: Why Tornado Forecasting Is Tough]
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Infographics Artist
Ross Toro is a contributing infographic artist for Live Science. He specializes in explanatory graphics that deal with science topics. Ross is a former art director of the Los Angeles Times, Associated Press and United Press International. He teaches Filipino martial arts when not dabbling in cartoons and animation.