Whymper North Bowl
Banff Yoho & Kootenay National Park
John Serjeantson , Thursday 15th April, 2021 3:55PM
Awesome conditions the higher you got, albeit a little heavy and wet in some spots. Late start to the day so we stopped as soon as we saw debris near our uptrack (right below the bench into the bowl). Stayed there for awhile to eat and dig a pit and never saw the small cornices/windlips fail but still didn't want to risk it. Skied down the steep avvy runout in the shade into the trees then down into a solar aspect, low angle run out. We limited our exposure time here but due to the low angle weren't worried about it as a start zone.
Snow conditions were: Heavy, Powder, Wet. Weather conditions were: Sunny. We rode: Dense trees, Mellow slopes, Open trees, Steep slopes. We avoided: Alpine slopes. Riding quality was good.
Avalache Conditions: Rapid temperature rise to near zero degrees or wet surface snow.
Did a CT on a slope right below the bench, got non planar fracture at CT15 then RP at CT25. Below that was extremely consolidated, hardpack snow that could not be broken even jumping on it multiple times.
Loose wet from steep terrain on solar aspects all day, as to be expected. Didn't see any crowns under debris and didn't see any cornice failure.