I’ve read the documentation under the link you posted. The lack of information would let one assume that using a single tag would create a combination of settings in the weather engine.
Like, when using supercell it would create the conditions at that location (including the proper formations and etc).
Maybe that happens in a future iteration. It’s assuring the tag has been added though, which means additional development in weather.
Really cool pictures though, very nice!
Cheers!