Storm arrived later than forecast, but was producing significant moisture by early afternoon. Even with a small load stability decreased rapidly. Based on weather station data, stability continued to decrease later in the evening and overnight.
Snowing S2 through duration of tour. Winds audible aloft and blowing plenty of snow at highway level on the drive south from Stanley. Light winds blowing along ridge.
None observed, zero visibility.
Slab on top of 12/11 facets is 45-50cm thick in this area. The entirety of the slab is in the 4F- to F- range. Very soft slab was propagating fractures despite this.
Layer Depth/Date: down 45-50cm
Weak Layer(s): Dec 11, 2020 (FCsf)
We avoided avalanche terrain.