"Surface" is a map of wind (or temperature) at model's lowest atmospheric layer.
Over the ocean (or open sea) it is the same with MSL.
In complex terrain it may differ a lot from reality.
Are those images from a book [in English or translated] that discusses specifics of weather models? If so, what’s the title/author?
If not, do you have recommendations for other resources you might be able to offer?
I’m serious about my plans to write up an “explainer” post for other people who might benefit from an “idiot’s guide” to Windy’s graphical displays, and I want to make sure I’m being accurate (but don’t want to pester you with every little question). Thanks!