A first hand account of the Nov 16 Hourglass avalanche became available on Nov 21. Read it here.
Observations from Castle Peak
Donner Summit Area
Date and time of observation:
Tue, 11/14/2017 - 13:00
United States39° 21' 53.1036" N, 120° 21' 40.446" W
Recent loading by new snow, wind, or rain
Observation made by: Forecaster