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Weather Words: Pressure Gradient

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Do you know what causes wind? Well, broadly speaking it’s the sun... but more specifically, how the sun unevenly heats the Earth’s surface. That leads to areas of high and low pressure forming, and in ...
MILWAUKEE -- Probably, at some point in your life, you've seen a weather map similar to the picture below. It has red Ls and blue Hs all over the place, representing low and high pressure. Looking ...