Hmm...
Thank you, Ken. You've given me not only the technical "fix," but also something to think about. I'd not considered the lower limit for Heat Index. I suppose I'll have to judge over time who my visitors turn out to be. Locals are attuned to Heat Index, though that may be changing little by little via TV. Because of our location, only the warm/hot months are really a consideration for much other than raw temperature. On the other hand, Disney visitors would make up a very different and non-homogeneous group, to say the least, and maybe Heat Index is not the way to go for them.
I think I'll file away your script modification and take another look at it in a few months. I've definitiely got enough else to do in the meantime!
Thanks again.
Bob
A second thought: I work a lot of track and field meets and it seems most folks from all over the country are attuned to Heat Index, come to think of it. However, and this may be a big however, I see them only in the late spring and summer months. You know, things used to be more simple...