Hi William: The best single station forecasting method that I have found is the "Sager Weather Caster". I have some info on it at: http://www.pacificsites.com/~brooke/Weather.shtml The accuracy may be improved by basing the lookup table on your local conditions. The book works best on the East Coast, but I used it in the S.F. bay area and it worked fine. Have Fun, Brooke -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu