Deep and Sharky

Lizard Range and Flathead

Nik Dunn , Friday 13th November, 2020 6:00PM

The snow quality was very good and made for great early season turns. There's a crust 80cm down that in places can offer you some support, however where the groundcover is predominantly rock expect shark attacks. Initially we were expecting a loose dry problem with isolated wind slabs, which was partially true. BUT a widespread touchy storm slab that is reactive to human triggering presented itself and became our main avalanche problem for the day. We observed natural slab avalanches on steep slopes mostly size 1-1.5. We observed remotely triggered avalanches on convexities. Shooting cracks were observed. No whumfing or drum-like sounds. We stuck to open trees and were careful to avoid convexities, and open slopes. Lots of small trees buried under 80-100cm of low density snow, watch your tips. HS 120 in an undisturbed wind protected area. Other probing along the skin track ranged from 80-100.

Snow conditions were: Deep powder. Weather conditions were: Stormy, Cloudy. We rode: Open trees. We avoided: Steep slopes, Convex slopes. Riding quality was good.

Avalache Conditions: 30cm + of new snow, or significant drifitng, or rain in the last 48 hours. Slab avalanches today or yesterday. Whumpfing or drum-like sounds or shooting cracks.

Snowpack

Very rough and quick test pit on the side of the skin track up backside of ridge. CT's were inconclusive Whats clear is there's a storm slab out there. HS100 60cm new storm snow - Fist 20cm older snow - 4 finger 4cm thick crust Facet layer to ground 1F.

Weather

Moderate winds and blowing snow at on the ridge near curveball. Significant drifting and scouring has occurred (grass is visible in spots, 1m tall drifts in others). Winds were Calm with light gusts in TL & BTL. Rate of fall wasn't consistent, but hovered around s4.

Avalanche

We observed several avalanches today. 9 second rumble off the headwall above curveball, didn't have a visual to see if it pulled anything in curveball. Several remote trigger avalanches, primarily on steep convexities. Evidence of multiple recent natural slab avalanches near cliffs & other shallow pieces of terrain. Crowns ranging from 30-60cm. Most slab avalanches were occurring in the alpine. Evidence of Loose Dry avalanches caused by tree bombs in treeline. Avalanche size ranges from 1-1.5

Source: Avalanche Canada MIN