What meteorological phenomena are causing these rains?
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@idefix37 What does this kilometer mean in forecast models?
What do these pressure lines mean, how does it influence meteorology?
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@mbmpc
The kilometers is their resolution. This means the ECMWF model provides forecast values on a 9km x 9km grid (like pixels of a photo). But between these points, values are smoothed by interpolation by Windy to give a continuous layer.
Pressure isolines, or isobars, show the atmospheric pressure field. You can check it with the Pressure layer + Pressure isolines.
The pressure differences produce the wind.To go deeply into details I think you better try to get more knowledge about meteorology with specialised books or websites.
I typed “meteorology basic” in my browser search bar and found plenty of websites like this one for example:
https://www.kavas.com/sailors-guide/chapter-a-the-basics/a2-the-weather-basic-principles.html -
Could you explain this graph to me, why there is no rain on Saturday and there is on Monday?
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@mbmpc
It seems to me that when you see a cloud, for you it automatically rains. No, clouds don’t automatically bring rain.To have clouds in the sky and to see precipitation, the air must reach a relative humidity of 100% and more, so that water molecules can gathered. It is called condensation. When the droplets have reached a certain diameter, they are big enough to fall and give rain.
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@idefix37 None of the forecast models, nor the storm layer, showed rain or storms. What model is used in the rain, thunder layer?
In the rain layer, thunder showed rain and in the satellite image. Which to trust layers or models?
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@mbmpc
The model used in the layer is the model you have selected in the menu !
Near the models list see About these data to get more information.
Satellite layer is observation by satellite
Rain, thunder layer is prediction by a weather model.
It so obvious that you seem to trolling us here ! -
@idefix37 You didn't understand my question, because the forecast models didn't show rain on Sunday.
And in the layer it was raining.
I'm not trying to troll, I just don't have knowledge of the weather and the windy website. And I need to clear my doubts.
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If you consider I did not reply to your questions, you must admit they are not clear at all.
@mbmpc said
What model is used in the rain, thunder layer?
Again, the model used in a layer is the model which is selected in the menu.
In the rain layer, thunder showed rain and in the satellite image.
What do you want to say?
Which to trust layers or models?
You seem to mix what is a weather model, a layer and a satellite view.
Forecast in Windy comes from weather model data computed by major weather centers. This data is transformed by Windy to appear as a layer on the base map. So you can’t say “which to trust layers or models”
The Satellite layer comes from data provided by satellites observation.None of the forecast models, nor the storm layer, showed rain or storms.
Global models with a low or a medium resolution are not able to forecast local thunderstorms and convective rains. So in your area without high resolution models you cannot expect to see a precise forecast for this type of rain. Even in the areas where these models are available, you never know precisely where the rain will fall.
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@mbmpc
Where did the layers show rain?
Probably your Satellite view shows a thunderstorm.
Your screenshot with a rain layer forecast by a weather model (but we don’t know which one) shows rain.
And your screenshot of weather models comparison does not show rain? But where is your point forecast ??
If the point is out of the rain area in the rain layer, it is not surprising that the table shows no rain.
Here is an example where you can see that the point forecast shows rain same in the layer by ECMWF.
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