"Big AL" wrote in message
...
I am not a buff, but have a keen interest.
I assume TS is thunderstorm, but what are cg's

Is there a glossary anywhere so I can keep up?

See Martin's FAQ :-
http://homepage.ntlworld.com/booty.weather/uswfaqfr.htm

and specifically
http://homepage.ntlworld.com/booty.weather/FAQ/c.htm

Jon.