Hello! Recently the weather radar data for Iceland went missing (few days). I´m guessing Windy gets its radar data for Europe from EUMETNET/OPERA? Anyways, the weather radar data from The Icelandic Met Office is available directly as HDF5 files following the ODIM standard here: https://brunnur.vedur.is/radar/data.html
The Met Office recently added the 3rd C-band radar in the northern part of the island, greatly increasing the coverage. I belive this site has not yet been added to EUMETNET/OPERA
I´m also the GIS Coordinator of the Icelandic Met Office so you should be able to at least answer some questions or add info if needed.