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    Temp in Caribbean

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    • C
      cape | Premium
      last edited by

      The temperatures displayed for most of the Caribbean islands has been a bit off all spring and summer. Example: The past week has shown temps around 82 degrees in Grenada but it is actually 87-90 degrees most days. Not sure how the info is derived but it is not quite correct.

      Gkikas LGPZG 1 Reply Last reply Reply Quote 1
      • Gkikas LGPZG
        Gkikas LGPZ Moderator @cape
        last edited by

        @cape
        its truth and it has to do with the size of an island.
        Forecast models compute temp. (and other variables) in places called grid points with resolution of 9 km for ECMWF (22 km for GFS). Some small islands are "invisible" by the model and the temperature given is that of the air above the sea.

        1 Reply Last reply Reply Quote 1
        • C
          cape | Premium
          last edited by

          Thank you for your help to understand this better.

          Gkikas LGPZG 1 Reply Last reply Reply Quote 0
          • Gkikas LGPZG
            Gkikas LGPZ Moderator @cape
            last edited by

            @cape
            If you could see the temp. on grid point, it looks like that:
            0_1505212936620_upload-6b1891f4-1ccb-4507-99c8-8ccdf9a7c611

            Small islands (like St. Croix) are represended by only one grid point and the temp. at this grid point is "smoothed" with the other nearby points.
            Biger islands (like Jamaica) have more reliable data.
            Meteorologists try to improve the accuracy by makings models with finest grid but it needs more (much more) computing power
            especialy if you want a model with global coverage.

            1 Reply Last reply Reply Quote 0
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