@Tokikura There is no update more frequent than 12h for ECMWF on Windy From last year, ECMWF make available 4 runs per day, but this is for users under special licence conditions : They are Weather Services members of ECMWF which use the IFS model as boundary for their own limited area models: https://www.ecmwf.int/en/about/media-centre/news/2018/ecmwf-widens-weather-forecast-product-availability You may use GFS which is updated 4 times per day.