open-meteo

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To get exact wind vectors from the nearest grid cell without any topographic statistical correction, use elevation=nan in your API request. This disables the default 90m DEM downscaling and prevents the system from selecting a different cell based on terrain height. For a 4‑day forecast with pure AROME‑HD during the first 48 hours and a smooth fallback to a lower‑resolution model afterwards, explicitly chain the models:
&models=meteofrance_arome_hd,meteofrance_arpege_europe (or meteofrance_arome_france for France‑only). The API selects the first model that covers each time step; when both cover the same period, the first listed model takes priority. This ensures high‑resolution AROME‑HD data for its maximum runtime, then a seamless transition to the global model without any blending that could dilute the 1.3 km resolution.