Harvey,
I saw the same thing in '05 on between Whitney and Muir. The temperature was in single digits, according to my thermometer, and the wind was at 30 MPH. I had on every stitch of clothes I had...including a pair of shell pants. I walked into Whitney Portal in shorts.
What if he incapacitated up there? How do you keep him warm without putting yourself at risk? Almost no one is prepared for this type of temperature in the Sierra in August.
