If you're like me, you woke up cursing a clear blue sky free of cirrus clouds, and wondered when it cleared. Looking at the IR loop at the UofA site, it appears that the last cirrus departed both Flat Iron and Sentinel at around 4 a.m. If it's any consolation, there are more clouds following the departed clouds by 12 hours. Tom -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.