And for weather that relates to YMDG, PUTY etc, you can easily identify where the weather will occur by looking at your PCA (I've underlined this weather). But for the bold/italicised weather, referring to "RANGES/SLOPES", you'll need to look at the WAC. You can't tell where the "RANGES/SLOPES" are by looking at the PCA.
ISOLATED THUNDERSTORMS OVER SEA S OF YWLM TILL 17Z. ISOLATED SHOWERS
S OF YMDG/PUTY UNTIL 17, AND DEVELOPING SEA/COAST N OF YGFN AFTER
12Z. BROKEN LOW CLOUD RANGES/SLOPES E OF YGLI/YNWD/YPMQ. ISOLATED
FOG/MIST NE OF YGLI/YWCH/YTRE, ALSO DEVELOPING S OF YMDG/PUTY AFTER