PK...
If you are not a pilot it's not a dumb question - most, if not all large aircraft do indeed have weather radars, the scanner assembly sits inside the nose and there are displays on the flight deck. The more modern kit colour codes the display, Green returns on the screen means there's no big problem, probably just lots of moisture, might be a bit bumpy, way up to Red or even purple which is an area you really, really want to avoid by a large margin.
(edited to try to avoid confusion over who's question I was answering)
Last edited by wiggy; 15th Feb 2008 at 12:12.