[shpx]

windytv is a fork of earth [0], which is open source [1] and made with D3.js [2], I'm guessing windytv is also using d3.

[0] https://news.ycombinator.com/item?id=12415777

[1] https://github.com/cambecc/earth

[2] https://earth.nullschool.net/about.html