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What Is a Rex Box?

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Bill Karins explains what happens when a high pressure and a low pressure set up over a region.

What Is a Rex Block?

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Oct. 1, 2015, 4:58 PM EDT / Updated Oct. 1, 2015, 4:58 PM EDT

By Bill Karins

Bill Karins

Bill Karins is a meteorologist for NBC News.

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