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You're listening to Shortwave from NPR. Hey, short wavers, producer Burleigh McCoy in the host chair today. So every couple of years when I was growing up in the suburbs of St. Louis, Missouri, my family and I would gather in our basement, not for a party or game night, but to take cover from a potential tornado. As a kid living around Tornado Alley, I thought this was normal.
If you're unfamiliar, Tornado Alley is just a seasonally shifting section of the U.S. that gets a high level of tornadoes. But I later learned that people who live outside of this area don't experience nearly the same amount of tornadoes.
It is really the global hotspot of tornadoes.
That's Sushmina Partak, a freelance science journalist who wrote about the science of tornadoes for the publication EOS. And she says the reason this region has at least 10 times more tornadoes than any other place in the world is clear.
You have to blame geography for that.
So tornadoes form from thunderstorms. And for them to do that, different types of winds need to blow at different temperatures in different directions.
You need cold, dry air coming in from one direction. Like from the Rocky Mountains. You need warm, humid air coming in from one direction.
Like the air coming up from the Gulf of Mexico.
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