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open-meteo / open-meteo

Free Weather Forecast API for non-commercial use
https://open-meteo.com
GNU Affero General Public License v3.0
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Show which weather model is used for `best_match` #214

Open ghost opened 1 year ago

ghost commented 1 year ago

Hello,

I have compared the previsions for the “Temperature (2 m)” from Paris on your website with the following models: "best_match", "icon_d2", "meteofrance_arome_france_hd",

the "best_match" graph is in fact the "icon_d2" German model for the 2 first days.

https://api.open-meteo.com/v1/forecast?latitude=48.85&longitude=2.35&hourly=temperature_2m&models=best_match,icon_d2,meteofrance_arome_france_hd

weather API

My question: is the German "icon_d2" model more accurate than the French high definition "meteofrance_arome_france_hd" model for France.

Can you give your sources that can confirm this, or is this an error from the API ?

Best regards

Jean Anton

patrick-zippenfenig commented 1 year ago

Hi, right now I only have subjective experiences that ICON-D2 provides better forecasts. It has higher update frequency and offers more weather variables. Thunderstorm prediction with hail for example is only feasible with ICON-D2. This might change, once MeteoFrance offers more open-data, but I am unaware of any new developments.

In the future, I want to upgrade the best_match selection to automatically select a domain based on weather forecast skill of the last weeks.

Did you try to compare weather forecasts from ICON and Arome to measurements?

SebSwan commented 1 year ago

I live in Brittany at the west of France, Meteo France model are way more accurate here (wind and rain). It will be a nice feature to know the model used for each "time" stamp in the "best match" and "seamless" model. Any way, good work !