# On SIGWX (significant weather) charts, what does **/** mean?

On SIGWX charts, it shows pairs of symbols with, say, */** or **/**. 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.

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if it’s a mixture, then why do they show (actual example from chart) **/**? You can’t have a mixture of the same thing. –  Peter Apr 4 '14 at 3:30
Jungroth: hmmm, interesting! Thanks for digging out the source material. It’s a bit strange because the **/** occurs quite a few times in the chart! –  Peter Apr 4 '14 at 3:47