America has some of the most varied and dynamic weather in the world. Every year, the Gulf Coast is battered by hurricanes, the Great Plains are ravaged by tornados, the Midwest is pummeled by blizzards, and the temperature in the Southwest reaches a sweltering 120 degrees. Extreme weather can be a matter of life and death, but even when it is pleasant--72 degrees and sunny--weather is still central to the lives of all Americans. Indeed, it's hard...