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    Real water movement vs what Windy is showing.

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    • Tom ErbilT
      Tom Erbil | Premium
      last edited by

      I live near the Delta waters of California. Oddly for instance today, your current direction vs. reality is way off. The tide is rolling in yet your tidal currents are showing that the tide is actually going out. Mallard Island Ferry Wharf, Suisun Bay. Oddly right at this moment the water shows movement coming in yet Windy shows the tide direction as going out.

      idefix37I 1 Reply Last reply Reply Quote 0
      • idefix37I
        idefix37 Sailor Moderator @Tom Erbil
        last edited by

        @Tom-Erbil
        Please could you give a little more detail? Are you referring to the local “Tide forecast” or to the “Tidal currents” layer?

        Tom ErbilT 1 Reply Last reply Reply Quote 0
        • Tom ErbilT
          Tom Erbil @idefix37 | Premium
          last edited by

          @idefix37 Tidal currents layer versus tidal forecast. This morning it was about 10:30 Am and High tide was at 2 PMish. And all the way up until even after 2, tidal currents were showing an outgoing tide. Not possible. It was incoming at 10:30.

          Tom ErbilT 1 Reply Last reply Reply Quote 0
          • Tom ErbilT
            Tom Erbil @Tom Erbil | Premium
            last edited by

            @Tom-Erbil Oddly enough, at the moment it appears to be showing the current correctly. Outgoing and it should be outgoing. Maybe there was a small glitch somewhere along the way.

            idefix37I 1 Reply Last reply Reply Quote 0
            • idefix37I
              idefix37 Sailor Moderator @Tom Erbil
              last edited by

              @Tom-Erbil
              So in fact you are trying to compare Tidal forecast and Tidal currents. Their data is different.
              Tidal forecast is a calculation based on tidal stations observation.
              Tidal currents is deducted from satellite altimetry data, and therefore this layer is completely inaccurate in bays and narrow areas as this thread explains:
              https://community.windy.com/topic/15265/tidal-currents/2?_=1621356804672
              Unfortunately I realise the link in my first post is no longer active. See the link of the second one.

              1 Reply Last reply Reply Quote 1
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