Don't think it's been mentioned before but Ogimet is a very useful site
http://www.ogimet.com/index.phtml.en

amongst a wealth of real time data there's also a handy satellite image with
colour state overlay
http://www.ogimet.com/cgi-bin/gmsat?lang=en

The designer, Guillermo Ballester Valor, is also currently working on adding
GFS model output.

Jon.