BTW, if anyone else would like to weigh in with a serious answer, I
would appreciate it. I can sort of see how they could use radar to
determine clound coverage, but the winds aloft thing is really
puzzling me. Take a look at http://www.navmonster.com/wx/KCDW-25; just
one Pirep (which does not even include winds aloft) but they have
winds aloft for various altitudes.