字幕表 動画を再生する 英語字幕をプリント tornadoes are so powerful they can flatten homes to their foundation. They can feel asphalt right off the highway on toss around 18 wheelers like they're small toys. Tornadoes can be the most deadly and destructive weather phenomenon on Earth. In fact, about 1000 tornadoes occur every year in the U. S. That's more than anywhere else on the planet. Strongest tornadoes, compact winds of 300 miles per hour or more. It could be a small is a couple 100 yards wide all the way to 2.5 miles wide. And the path of destruction can be a couple 100 yards or extend out 50 miles or war. When conditions are just right, you'll get warm, moist air coming in from the Gulf of Mexico that will collide with dry, cooler air from the north. When these air masses collide, it creates a lift in the atmosphere. And when you get those winds rotating and increasing speed with height, that will create a horizontal column over there that's spinning.