A two-mile-wide tornado tore through the Oklahoma City suburb of Moore on Monday afternoon, claiming the lives of at least 91 people.<br /><br />Tornadoes form when cool, dry air high above the ground collides with low-to-the-ground moist, warm air, converging in a zone in the central United States known as "Tornado Alley".<br /><br />The difference in speed between winds in the upper atmosphere and those on the surface causes an atmospheric imbalance forming horizontal spinning columns of air.<br /><br />These columns are bent upwards, turning vertically when caught in the updraft of thunderstorms.<br /><br />The continuous upward and downward motion within the thunderstorm causes the rotating column of air to drift below the cloud base, creating a tornado at the surface.<br /><br />Residents of Moore are no strangers to tornadoes, but a whirlwind the size of Monday's giant tornado is a rare occurrence.<br /><br />FOR MORE TOMONEWS US, GO TO:<br />http://www.youtube.com/subscription_center?add_user=TomoNewsUS <br /><br />FOR MORE FUNNY TAIWANESE ANIMATIONS, GO TO: http://www.youtube.com/subscription_center?add_user=NMAWorldEdition <br /><br />FOR MORE FUNNY TAIWANESE ANIMATIONS IN ENGLISH, GO TO: http://www.youtube.com/subscription_center?add_user=NMAtv <br /><br />FOR MORE TOMONEWS JP, GO TO: http://www.youtube.com/subscription_center?add_user=TomoNewsJP <br /><br />FOR MORE APPLE DAILY ENGLISH, GO TO: http://www.youtube.com/subscription_center?add_user=AppleDailyEnglish <br /><br />CHECK OUT THE ODDBODS!<br />http://www.youtube.com/user/nxTomo
