Forecast and Current Temperatures for Southern French Alps
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In the vicinity of Guilllestre, Briançon, Embrun, France your forecast temperatures and map displayed current temperatures are significantly different than the current weather station temperatures that you display for those areas and significantly different than other forecasters such as Meteo France. It is commonly off by >15°F. Why is this?
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@story8-b4
You have got a reply to the same question one month ago ! Do you read the answer you receive?The conclusion was ‘’ Guillestre is located in mountains at 1000m and is surrounded by high summits 2500 to 3000m. In this situation global models with 9 km resolution and more cannot give good temperature forecast ‘’
Or is it a problem for you to understand what model resolution is ? In this case I can explain it to you. -
@idefix37
I did a search for my earlier question but your system did not find it, so I sent the question again with a screen capture as an example.Yes I understand spatial resolution of raster data. I thought that perhaps there was a terrain adjustment applied to temperatures for locations where people look for answers, such as towns in small valleys, since temperatures are labeled on the map display at these locations.
I find the model estimates to be very accurate where I live in a coastal area, but then the temperatures variations are small here. Now I know that the temperature estimates have no terrain adjustments for towns in mountainous area. Thank you.
I see that you are listed as a moderator. As such, you represent Windy. Perhaps you don't work for them, or perhaps you do. But your tone is very disrespectful and rude. (Perhaps it is a language issue.) I am a paying customer who has found Windy reliable and useful where I live. You act like I'm a lazy student who didn't do their homework. I was trying to find information.
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@story8-b4
I don’t represent Windy and I don’t work for them. We try here to answer questions and you may understand that it’s very frustrating as many of this forum users don’t look at replies. I’ve seen a user asking 12 times the same question without reading the answers.
Sorry if you feel me rude.
I confirm that Windy does not introduce special algorithms to rectify the temperature inaccuracies in mountains, but that should be a very nice idea if it was possible.
And to illustrate the reason for these wrong temperatures, you may look at Sounding (right click on mouse or long press on screen with the app), it gives the ‘’model altitude ‘’ and the real altitude of Guillestre:
The ECMWF ‘’see’’ this location at 1894m, instead of 1000m, due to the horizontal grid 9 x 9 km and to the coarse orographic model used by this weather model.
But you can select another weather model to get more precise temperature. Using the Observation vs forecast tool (click Reported temperature and select a weather station near your location ), you can compare the different models with the observed temperature.
AROME (1km resolution) gives quite a good prediction and METEOBLUE too. The swizz weather company, Meteoblue, have developed this model for a better result in mountain with finer altitude algorithm.
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Thank you very much. That is helpful and informative.
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Referenced by
idefix37