Tide Forecast on Windy


  • administrators

    @kekert is a snowkiter, and has never been on sailing boat, but as a mathematician he gathered some harmonics files so tide forecast on Windy is reality.

    Tides are implemented as points on a map, so just click on icon of boat and you there you are. We have tides only for US, some Caribbean, Netherlands, UK, Australia, NZ, Japan and Canada and some other locations

    The symbol of an icon is actual tide forecast for given time so move timeline and magic will happen.

    To open tide station just click on an icon of boat

    _left

    _left


    BEWARE: Tides can be forecasted only at certain tide stations (where measurement has been made). Some fraudulent mobile apps try to convince you, that there is some universal formula, to forecast tides for any location. They are liars.


    Tide stations wanted! We would love to increase number of tide stations on Windy. There is a project to create free creative commons database of harmonic files. Details here: https://community.windy.com/topic/4893/contributors-wanted-2-creative-commons-database-for-free-tide-forecast

    Picture of @kekert

    _center_shadow



  • Great Idea. As of March 3, I see lots of little boat icons that correspond with NZ tide stations.
    But I see no data when I click on any particular tide station: no tide table, no harmonic graph, and no current info either.

    Boat icon is the same as was used for currents. Will these now be displayed together? Or are currents to be abandonded?

    In Whangarei NZ.



  • Super, perfekt 馃憤馃憤馃憤



  • What does 5.3 at 13:45 in the popup information mean ?



  • Okay, now I can see data for NZ stations in the right hand side bar. I don't see the "E" or "F" symbols for Ebb or Flood current at that station. I don't see the up or down arrows for high or low tides at that station. I see the boat icons only. I do see the symbols at stations along the US west coast, e.g. Columbia River entrance. Thank you.


  • administrators

    @mrandall seems like a bug. Send a screenshot pls


  • administrators

    @mrandall This must be bug. I see NZ stations all right. Please investigate.



  • Loving it.. But what I really want to see is a 30+ day graph of tide height with sun/moon rise/set times.
    Lots of usages including clamming, photography, shorebird watching.

    Keep up the good work!


  • Moderator

    @renelis said in Tide Forecast on Windy!!!!:

    What does 5.3 at 13:45 in the popup information mean ?

    (Date) 5.3. At 13.45(h)

    @ivo to make it clear maybe would be better to write
    5.3.18 at 13.45h



  • Love it!
    Particularly when you play the tide timeline overlaid on the wave forecast map.
    Very useful during the storm surge we were having this weekend on the east coast of Canada and the US eastern seaboard.



  • i love it keep up the good work



  • This is a good news to read that you're providing tidal information. First of all it is not forecast tides but predicted tides as it is based on harmonic calculation. Forecast tides would require observations to recalculate the predictions. Also, you are providing tide info for non tidal areas, upstream of Trois-Rivieres in Canada. There are waterlevel stations going up to the Great lakes. I also noted a bug for some stations as the information appear twice for low and high tides with slight differences (Rimouski). Thank you for considering my comments as Windy have been very innovative.![text alternatif](0_1520514969179_Screenshot_20180308-075925.png url de l'image)



  • As for the date, a more conventional way would be more appropriate to avoid confusion with tide value in meter.



  • For Canada, you could use the following web services to provide observations, predictions and forecast
    http://www.tides.gc.ca/eng/info/WebServicesWLD



  • Tried it in the betaversion, loved it , thnx for adding it.


  • administrators

    @paris-brest Yep we do confirm a bug a working on a fix


  • Global Moderator

    @paris-brest thanks for pointing it out, should be fixed now



  • Love the ability to move through tide progression. Unique and helpful. Would like to be able to have tide stations in favorites if possible. Best weather app out there!



  • I have now logged more than 66000M on my 7m40 long boat covering the British Iles, Ireland and The Netherlands round past Spain and on to Italy. Passage making or going up river till the boat grounds (at 1m) I know what I want from tide information. A weeks coefficients and H and L heights and times for the expected area are copied out on a formica board and kept at the chart table for reference at all times even when the boat is ashore for maintenance.
    You have made a good start -But

    1. All the times should be dated unambiguously (d/m or m/d).Try a line for date as punctuation between the data blocks.
    2. Even the British Admiralty now use metres for depth. Remove the ft. It is just clutter and as such can only be a source of error or confusion.
    3. Remove the reference to the previous or next tide which is just more clutter ( and wrong see 6)). The time NOW appears at the top of the screen on my iPad. I can do the rest.
    4. Cut the clutter of words. HW and LW are well understood and not even needed if the data is decluttered.
    5. Add Tidal Coefficients. The British shun them because they are foreign but they are one of the most usefull tools available when working depths and calculating tidal stream rates.
    6. In the data box under Type: add the data source.
      On the 12th March
      Your values
      LW 0739 2.48m HW 1401 4.22m LW 2024 2.39m
      UK Hydrographic Office
      0114 4.2 0731 2.3 1411 4.1 2007 2.3
      SHOM
      HW 0121 4.19 LW 0746 2.32 HW 1407 4.15 LW 2025 2.24
      National Tidal and Sea Level Facility
      0105 4.29m 0750 2.42m 1357 4.23m 2029 2.43m
      tide-forecast
      0138AM 4.17m 0812AM 2.47m 0219PM 4.12m 0843PM 2.43m (Yes I know)
      Tides for fishing
      0111 4.3m 0737 2.5m 1400 4.3m 2022 2.4m
      Mobile Geographics version 1
      0155PM 4.00m 0836PM 2.41m
      Mobile Geographics version 2
      0220PM 4.12m 0843PM 2.43m
      On the UK E Coast be ready a comfortable half hour before any time and watch. Rubish in a tidal stream can reverse direction without loosing speed at tide turn. Heights depend heavily on North Sea conditions and sometimes match the tabulated values sometimes. Just listen to the Thames Navigation radio for the river pilots.

    Keep it simple.Just provide the numbers with their source and leave the skipper to do what skippers do.


  • Sailor

    @timber2
    Good advice Mate ! Most are for Windy but some are only for skippers.
    OK to remove the ft, but may be this unit is used in USA?
    HW and LW is fine.
    Strange to me that you like tidal coefficients. Are they available in UK? I鈥檝e never see them used in this country.
    At # 6, I don鈥檛 understand the examples you give, is it just to show that everyone does not display tides in the same way?


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