@btrimm did you ever find a way to do this in leaflet?

@idefix37 and @vsinceac, thank you both very much for the replies and information.

All GFS 0.25° grib files provided by NCEP/NOAA after this upgrade do contain announced changes. I don't know if Windy downloads grids of all available parameters/levels: data is huge (>0.5 GB for each forecast), while downloaded grids may be filtered by both coverage, forecast, parameter and level.
Obviously not all available parameters and levels are available via Windy UI.
Anyway, introducing all parameters and levels on UI would be useless for most of the Windy users (e.g. some parameters are available for levels 0.1 hPa, 0.2 hPa, etc.); they would be only useful for research purpose.

@petra-pik Cheers :) Values are looking good!

@bullicante
I see, you get at first the direction arrows of wave types. That’s because you have selected one of your favourites (Porto Ercole): It opens the forecast diagram and give directly the direction arrows.
To get the same picker as the one I’ve shown, you must click just near your favourite location.

0_1540225787551_FD70ACD6-DF90-4846-99FF-3AC634A25B3C.jpeg

Don’t worry if it’s not exactly on your favourite location because the wave model has a resolution of 13km.
Note that close to the sea shore wave models cannot be very accurate. They give the wave conditions offshore.

(Your website is very nice !)

@nobubu
https://community.windy.com/topic/3361/description-of-weather-overlays