Exercise caution as you transition through treeline, especially pushing into terrain that's off the beaten path where the Jan 29 surface hoar may be preserved.
Travel is fast, but skiing is challenging! Wind affect, crusts, and treebombs galore..
This has become a low probability high consequence problem - triggering remains possible on treeline slopes that were not heavily skied, weren't beaten up by the wind and sun prior to the 29th, or haven't already had an avalanche on this layer.
Watch for loose snow avalanches on solar aspects during the heat of the day.
There were a few size 2-2.5 avalanches triggered by warming in the highway corridor and in the backcountry on Thursday.
There were near daily reports of skier triggered avalanches this past week, several confirmed to have failed on the Jan 29 Surface Hoar...
The Hourglass
Bonney Moraines - MIN, MIN, MCR, and an additional Sz 1.5 with a partial burial
A ridge of high pressure for the weekend gives mostly sunny skies and warm daytime temps.
Tonight: Clear periods. No Precip. Freezing level (fzl) 800m. Alpine low -2*C. Wind light from the west
Sunday: Cloudy with sunny periods. Fzl 1900m. Wind light-SW
Mon: Isolated flurries (trace of snow). Fzl 1500m. Wind light-SW
Extreme South winds have created widespread wind effect, and scoured exposed slopes back to previous firm surfaces.
Warm temps/rain has created a crust into the alpine on solar aspects, and on all aspects below 1650m.
The Jan 29th SH layer is buried ~50-80cm, is 5-15mm in size depending aspect and elevation, and remains reactive in isolated areas.
