Hour difference between Windy and Meteoblue



  • I notice there is an hour difference between Windy (Meteoblue model selected) and Meteoblue website itself.

    For example, London:
    windy.jpg (Windy)
    mb.jpg (Meteoblue)
    Times are (supposed to be) local.

    Maybe it's related to Daylight Saving Time? I couldn't notice any differences for Moscow, which doesn't use DST.



  • Hello @sihida we display Meteoblue model NEMS and Meteoblue shows on their website forecast data which are the result of their Meteoblue AI.

    In this thread, you can read what Meteoblue said about this:

    meteoblue 4 Dec 2019, 12:27
    The meteoblue AI produces a consensus forecast. That is the forecast you see on our main page, or in every product seen on our page that only shows one forecast. The model average shown in the multimodel is just the average, which is most of the time very different from the AI consensus. Windy shows the AI consensus when our forecast API is used. I believe this is in the timeline local forecasts of windy, but definetly not on the maps and likely also not when you pick data from the maps by mouseclick (but not sure about this last point). The AI takes into consideration many very local factors at very high resolution, so that we do not produce a gridded AI forecast that could be plotted on a map.



  • @petra-pik said in Hour difference between Windy and Meteoblue:

    Hello @sihida we display Meteoblue model NEMS and Meteoblue shows on their website forecast data which are the result of their Meteoblue AI.

    In this thread, you can read what Meteoblue said about this:

    meteoblue 4 Dec 2019, 12:27
    The meteoblue AI produces a consensus forecast. That is the forecast you see on our main page, or in every product seen on our page that only shows one forecast. The model average shown in the multimodel is just the average, which is most of the time very different from the AI consensus. Windy shows the AI consensus when our forecast API is used. I believe this is in the timeline local forecasts of windy, but definetly not on the maps and likely also not when you pick data from the maps by mouseclick (but not sure about this last point). The AI takes into consideration many very local factors at very high resolution, so that we do not produce a gridded AI forecast that could be plotted on a map.

    No, Windy's forecast (I'm not talking about the NEMS maps!) also shows the result of Meteoblue AI:
    windy.jpg (message is shown when using Windy's compare function)
    Windy's forecast and Meteoblue's forecast are the same (1:1), except for one hour difference! Please check yourself. I do not know if Windy or Meteoblue is wrong. It's probably related to Daylight Saving Time (DST), as the forecasts are the same (no hour difference) for e.g. Moscow (no DST).



  • Very weird, it looks like e.g. Manhattan, New York, USA has also one hour difference, but in the other direction... Compare temperature/rain:
    windy.jpg (Windy, Meteoblue AI forecast selected)
    mb.png (Meteoblue.com, forecast; sum of first three rain bars = 1.6mm; sum of last two rain bars = 0.8mm)
    (Same for e.g. Rotterdam, The Netherlands.)

    For example, Windy-Meteoblue shows higher temperatures than Meteoblue.com (i.e., the temperature of one hour earlier, as I was able to confirm by looking at the hourly forecast of Meteoblue.com), whereas in the case of London (see topic start) Windy-Meteoblue shows lower temperatures than Meteoblue.com (i.e., the temperature of one hour later, as, I was, again, able to confirm).


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