The "South Face" at Big Sky. It faces east.:D
Yep that was ambient temp. fortunately the wind wasn't blowing much, that cloud is fog from the sun warming to surface enough to form a cloud. I was also in my office, Nissan Frontier with a good heater. The BSSP however had been out there doing control work when it was much colder. Good sized slide starting on Casro's (center) and extending across the Wave.