I would like to take the opportunity to introduce our Weacast project to this community. Indeed Windy is a really great application and we believe Weacast could also be a great complement for some use cases. More specifically it aims at helping develop weather data-oriented API and weather-data analysis to build your own application.
We are also looking for enthusiastic meteorologist developers to integrate more forecast models or others nice features. You can at least star our GitHub project so that we will know it is worth it to continue it.