SE of Meslillooet Mtn

Sea to Sky

pmarshall , Wednesday 3rd February, 2021 4:35PM

Steep south aspects were becoming moist by midday. Some pinwheeling and loose sluffing observed. Widespread natural avalanche cycle in the past 24-72+ hours. Numerous size 1-2.5 in recent storm snow and evidence of many size 1.5-3 slabs failing on the Jan 24 persistent weak layer. Avalanches were evident on all aspects on most slopes over 35 degrees. Some recent wind effect noted along ridges and cornices are getting large. Picture shows visible crowns on the NW side of Mount Bonnycastle.

Snow conditions were: Deep powder. Weather conditions were: Warm, Sunny. We rode: Mellow slopes. We avoided: Steep slopes, Convex slopes. Riding quality was good.

Avalache Conditions: Rapid temperature rise to near zero degrees or wet surface snow. 30cm + of new snow, or significant drifitng, or rain in the last 48 hours. Slab avalanches today or yesterday.


CTM11 and CTM21 sudden planar on rounding facets above the Jan 24 crust.


Temperature inversion with temps above freezing in alpine and -3 to -5 below 1000m

Source: Avalanche Canada MIN