Severe SW winds have stripped, and transported snow from many areas in the alpine and treeline.
Loose dry, spindrift avalanches remain a problem for ice climbers
Caution in thin snowpack areas where triggering is more likely. This is a low probability but high consequence problem.
Deep persistent slabs are best managed by:
Cornices are best managed by:
Tonight: Clear periods. Low -18 C.
Wednesday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: High -14 C. Ridge wind southwest: 20-40 km/h.
Thursday: Flurries. Accumulation: 7 cm. Alpine temperature: Low -13 C, High -9 C. Ridge wind southwest: 25 km/h gusting to 60 km/h.
Moderate to strong ridge top winds from the SW have created wind slabs or hard surface conditions in alpine and tree line features. In sheltered areas the top 30-60cm is faceted snow over a supportive mid-pack where the snowpack is deeper. Thin snowpack areas are weak, un-supportive, and facetted.
Avalanche control on the Icefields Parkway Monday produced results up to size 3 in the Parkers Ridge zone. Late afternoon activity noted, pockets of loose wet, triggered from steep W aspect. Likely the result of isolated sun and 'greenhouse effect', warming in the Wilson zone.