Update 10:00 am Nepal time 9 May: Scott is back at Everest Base Camp - disappointed - but otherwise doing fine.
Update 9:11 am Nepal time 9 May: Weather conditions atop Mt. Everest have become unacceptable for further ascent at this time. Scott and other climbers have begun to descend from Camp II and should be back here at Everest Base Camp any moment now.
"Keith Cowing: I just spoke with Scott at Camp II by radio . He sounds cheerful, rested -- and excited. Scott is currently on a rest day before tomorrow's push to Camp III - but he is not just "resting".
"Keith Cowing: There was a massive avalanche off of the west shoulder of Mt. Everest this morning. Within a very short period of time the entire lower Khumbu Icefall was enveloped in pulverized ice and snow."