After taking off the inner fenders and checking/lubing all of the hood hardware I thought I had cured the dreaded squeak. But no! Seems that the temperatures just were not right on Saturday and the squeak came back in full form on Sunday. Ahhhh! Well here's what has taken care of it:
1) Backed off all the hardware securing the fender.
2) Applied some silicone spray to the hardaware and surrounding surfaces.
3) Gave the car a few good bounces.
4) Tightened the hardware.
5) Squeak gone!

Needless to say I'm sure happy I didn't jump into replacing the windscreen! Appears that at certain temperatures the fender was stressed and causing a squeak. Backing off the hardware removed whatever binding there was and the squeak with it. Hopefully it will stay gone. Thanks again for the help and suggestions.

Andy