.... not sure if this is generally known, and I only stumbled across it a
few weeks ago.

By visiting the WZ site at:-

http://www.wetterzentrale.de/topkarten/ani/gfs/

you can select fields (use the drop down menus), wait for the loops to
build up, then using 'mouse-over' on the listing of forecast periods at
the left-hand side, it is possible to rapidly run up and down the
output, comparing various fields etc.

Martin.


--
FAQ & Glossary for uk.sci.weather at:-
http://homepage.ntlworld.com/booty.weather/uswfaqfr.htm
and
http://booty.org.uk/booty.weather/metindex.htm