Windy Community

    • Register
    • Login
    • Search
    • Unread
    • Categories
    • Groups
    • Go to windy.com
    1. Home
    2. Tags
    3. currents
    Log in to post
    • All categories
    • Ondřej Šutera

      Solved Current data are temporarily not available
      System Status • outage currents • • Ondřej Šutera

      11
      3
      Votes
      11
      Posts
      334
      Views

      deep3 deed3

      hello! ! It seems that the tidal forecast data has been restored.
      Thank you for starting the topic!!

    • Korina

      Major sea currents update: high resolution and new Tidal currents
      Announcements • article currents tidal currents ocean currents • • Korina

      13
      59
      Votes
      13
      Posts
      13027
      Views

      idefix37

      @tandemtime
      There are 2 currents layers in Windy.
      Currents which includes all type of currents. As wind is the main factor of ocean circulation, its effect is taken into account (but not sure for a local wind)
      https://marine.copernicus.eu/news/new-catalogue-release-wind-wave-ocean-current-and-biogeochemical-variables
      Tidal currents is deducted from variation of sea altimetry
      https://community.windy.com/topic/15265/tidal-currents?_=1614707415967
      Concerning waves models, WW3 model is said to include the effect of surface currents, WAM model apparently not.
      Depending where you usually sail, these layers are interesting but it is advised to rely on other traditional and official information sources for currents and their effect on sea surface, specially near the coast.

    • idefix37

      Tidal currents
      Your Feedback and Suggestions • tidal currents currents • • idefix37

      4
      6
      Votes
      4
      Posts
      1988
      Views

      idefix37

      @suthagar1
      My link here above is no longer active. Anyway, you better ask to CMEMS from Copernicus. They provide data from My Ocean / Mercator Ocean based on sea surface altimetry prediction for tidal currents.
      And see:
      https://marine.copernicus.eu/access-data/myocean-viewer

    • afurley

      Waves and Currents
      General Discussion • currents waves wind waves sailing • • afurley

      2
      0
      Votes
      2
      Posts
      1149
      Views

      idefix37

      @afurley
      All waves models don’t take into account the effect of current.

      For WAM model from ECMWF(July 2018):
      « Considerations when using output from ECWAM
      Not yet modelled are the interaction of waves with sea-surface currents. In particular areas, (e.g. Gulf Stream or Agulhas current), the current effect may give rise to localised changes of up to a metre in the wave height »
      From
      https://confluence.ecmwf.int/plugins/servlet/mobile?contentId=131397261#content/view/131397261

      For WWW3 model it seems to be different (March 2019):
      https://github.com/NOAA-EMC/WW3/wiki/Manual
      Page 1
      « The model [....] computes other transformation processes such as the effects of surface currents to wind and wave fields, and sub-grid blocking due to unresolved islands »
      Page 163
      « 3.9 Winds and currents
      Model input mainly consists of wind and current fields. Within the model, winds and currents are updated at every time step ∆tg and represent values at the end of the time step considered. »

      In any case it would be much better for you to sail downwind and down swell. But this is quite tricky in the Agulhas current area, the swell being mostly from SW. Don’t you plan a stop in Durban?

      Concerning receiving data via satellite phone:
      https://community.windy.com/topic/6601/offline-use-of-windy

    • S

      Current direction is about 180 degrees off
      Your Feedback and Suggestions • current directi currents direction labels • • Stubones99

      4
      0
      Votes
      4
      Posts
      865
      Views

      Gkikas LGPZ

      @idefix37
      Thank you!
      0_1530858211298_70a66faf-e505-426c-b84e-5ee6ce3190ce-εικόνα.png
      @administrators must fix it

    • T

      Which model used for currents/ waves and what resolution?
      General Discussion • resolution model seas currents waves • • tubbssurf

      2
      0
      Votes
      2
      Posts
      2009
      Views

      ivo

      @tubbssurf ECMWF-WAM and WW3. We use both and you can choose