I've noticed these little bits of shorthand at the end of METARs before. Places like Canada and some parts of the USA do it too.
I guess it might just be a way of giving a bit more info about the local weather than just that expected at the airfield? Dunno
Ah ha!
Here's one for your next Met exam/Line check/whatever!
Beaufort Codes
So J is - Phenomenon within site but not at the location of the observer
And P is - Shower
