On SIGWX charts, it shows pairs of symbols with, say,
**/**. I know what the symbols mean on either side, but why are there two, and what does the slash indicate?
Would love good resources that explain more, too.
Example chart here, from the FAA sample questions (caution: 37 MB download), Figure 20, over Southern California.
I’m also interested in knowing what a dot with
R underneath means.