Issued: Apr 5th, 2023 4:00PM
The alpine rating is Persistent Slabs., the treeline rating is , and the below treeline rating is Known problems include
Plan a safe day out in the park, by avoiding hazards from cornice fall and the many lurking crevasses on our glaciers.
Wednesday a skier triggered a size 1 on a SE asp, in the alpine behind Mt Bonney. This was a thin slab above a crevasse failing down ~15 cm.
Also on Wednesday, a natural avalanche sz 2,5, possible cornice fall off Mt Bonney, MIN.
Two moist snow skier triggered avalanches on Tuesday at the top of avalanche crest. These were sz 1.5-2, triggered on a sun at the bottom of the recent storm snow down ~15cm.
A cornice failure from above caught a person on Cheops N 1 today, knocking them downslope ~300m.
A field team around Lookout Col/Ravens area was able to ski cut loose surface sluffs to sz 0.5 in steep terrain.
Expect a surface crust on solar aspects and dry snow on polar aspects. 15-20cm of settled snow is covering the March 31st which is a a solid crust on solar aspects and isolated surface hoar/facets on polar aspects.
The mid and lower snowpack is generally strong. However, the basal weakness from November can still be found near the ground in many locations. This layer will remain a concern until the end of the season.
Building cloud Thursday, as a frontal system arrives bringing snow starting Friday, fz lvl ~1700m
Tonight: Cloud/Sun, Alp low -8*C, light SW wind, FZL 700m
Thurs: Isolated flurries, Alp high -2*C, light/mod S wind, 1700m FZL
Fri: Snow, 15cm, Alp high -1*C, light, gusting to Mod SW wind, 1900m FZL
Sat: Cloudy w/flurries, 5cm, Alp high -2*C, light gusty to mod SW winds, 1900m FZL
Terrain and Travel Advice
- Be carefull with sluffing in steep terrain, especially above cliffs and terrain traps.
- Closely monitor how the new snow is bonding to the crust.
- Caution around slopes that are exposed to cornices overhead.
Use caution on solar slopes where a sun crust in present down 10-30 cm. Riders have triggered this crust in the last couple days, creating avalanches up to size 2. Watch for sluffing on polar aspects.
Aspects: South East, South, South West, West.
Elevations: Alpine, Treeline.
Valid until: Apr 6th, 2023 4:00PM