(The number is in kilopascals (kPa), which is the same as millibars). The typical sea-level pressure is a little bit more than 1000 millibars. Since the pressure goes down with altitude, this reading has been adjusted to show the pressure as if the station were at sea level. The number to the upper right of each station is the barometric pressure. The higher the dew point, the more water vapor there is for producing rain or snow. The dew point is a measure of moisture it shows how much you'd have to cool the air to get a relative humidity of 100 percent. maps) or degrees C (for other countries). The number to the lower left of each station is the dew point temperature in degrees F (for U.S.
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