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    in the wind airgram picture...

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    • A
      ag45
      last edited by

      ... what is the meaning of the lines labelled in "xxxh" ?

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      • Gkikas LGPZG
        Gkikas LGPZ Moderator
        last edited by

        Pressure in hPa (hectoPascal).
        The "standard" pressure on the surface (sea level) is 1013 hPa.
        As we go up, the pressure falls.
        So, at 850 hPa we are at elevation of 1500m (5.000 ft)
        at 500 hPa, 18.000 ft etc

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