What source of weather data Windy use?
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@Gkikas-LGPZ
It was quite obvious for me that the isobars cannot match perfectly the satellite layer. And to get the best compromise it is necessary to set first the timeline on the current time. But I agree with you, that could be done automatically by Windy. From a theoretical point of view, it is wrong to mix forecast and observation. So in this case, Reported wind and Reported temperature should not been displayed at same time with all forecast layers. They show crazy values if the timeline is set 12 hours ahead and more... Windy needs a bit of understanding and training. -
From a development point of view:
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Should there be some type of pop up warning about mixing these combinations of layers together?
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Or should it just be impossible to mix these combinations in the first place?
What are everyone's thoughts about this?
WINDY is everywhere :)
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@jmh2002
My opinion:
Satelitte layer must be "mixed" with isobars and/or other isolines
ONLY if those isolines reffer to the time of sat. image (plus/minus 1 hour).
I agree with idefix37 that theoretically is wrong to mix forecast and observations
but practically I like to have sat. + isolines (isohypses) at 850 or 700 hPa
to predict the direction of thunderstorms movement. -
I think the best would be to clearly display on UI the validity time of the static data displayed on isolines layer (pressure, temperature, etc.).
This way I think nobody would say that it is a bug: users should easily understand this.
It is the same as when displaying a time series of observed data today AND of the data observed one year ago, on the same 2D plot; this is often used in analysis and it is really useful when the validity time of each time series is clearly labelled. -
@jmh2002
I don’t think a warning pop up would be a good idea (it is not in the Windy culture). IHMO it could be done automatically when isobars are selected together with satellite layer i.e. isobars should be displayed at about same hour as the last satellite observation as @Gkikas-LGPZ said.
I think this is possible in the same way as when you select Rain accumulation with ECMWF at 10 days and switch to ICON, the time lapse is automatically set back to 12h. -
Please review these last comments and note and discuss with the development team regarding how this can be improved, thank you :)
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You mention that NEMS is only available in Europe.
But, I'm based in Hong Kong, and METEOBLUE is shown, besides GFS and ECMWF, as models for this location.
Why?
Thank you!
Peter S -
@peteraschindler Hello, NEMS is a local weather model created by Meteoblue. Meteoblue model is only available in the detailed forecast and yes, it is global model.
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@peteraschindler
Find here additional information about the difference between NEMS and METEOBLUE. It is called Meteoblue AI by this forecast provider:
https://community.windy.com/topic/10316/metoblue-wildly-inaccurate-in-the-sw-usa/4?_=1588859394205 -
@peteraschindler
Meteoblue is a Swiss company who developped a global model called NEMS. With this model, you can get weather forecast all over the world as this a global model, as GFS for instance. -
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What is the data source for satellite? How does Windy get it from EUMETSAT?
If it is EUMETCast Satellite Europe - Ku-band than what do you get from it?
Does Windy pay EUMETSAT for it?
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@yqw Hello, the source is Eumetsat and data are displayed based on the contract.
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@sv1aaw That would be great. WU was extremely accurate until Weather.com bought them and they dismantled the PWS network. I am in Central America and the WU 6 hour graphic forecasts could be relied upon. It was a game to see how accurate they were to the quarter hour.
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Is it possible to default to NAM instead ECMWF?
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@howardkuo
The default model of Windy is the model from ECMWF. It is not possible to set another model as default. -
@dzuremar said in What source of weather data Windy use?:
@idefix37 Hello ! We use AROME with resolution 0.01° (1.3km). Both of the AROME resolutions have 00, 06, 12 and 18 ref time runs. There are also 03, 09, 15 and 21 ref time runs which we don't process. Advantage of AROME 0.025° (2.5km) is that it includes pressure-level layers. AROME 0.01° provides only surface-level layers, only wind and relative humidity are additionally in 20m, 50m and 100m altitude. However, AROME 0.025° also covers much smaller area - a square that covers whole France and a bit of surrounding area.
It seems that the AROME 0.025 now cover the same area as AROME 0.01. Is there any chance that Windy switch, or add AROME 0.025 to the supported models? The area of new icon D2 is quiet small either. The french paragliding community badly needs the pressure layers on the AROME model
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Hello, my first message/question in the community hope no problem to ask such question. Which model you suggest to use in sailing in Turkish Aegean and Mediterranean coasts ? Thanks
Arda -
@arda-gulcil Hello, I recommend trying all the available models to find the best one for the location.
