Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 1–2
Variable wind direction over the past week has caused reverse loading in some areas.
Bulletin d’avalanche
Voir sur la carteJasper
Dec 31, 2021 – Jan 1, 2022
Archivé · expiré 5 years ago
Danger d’avalanche
Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Points saillants
Building windslabs and irregular reactivity on deep instabilities is dampening our overall confidence in the snowpack, stay attentive to changes in slab consistency; underfoot, and in overhead terrain!
Problèmes avalancheux
Deep Persistent Slabs
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Unlikely - Possible
- Taille
- 2–3
Recent avalanche observations have shown that deep persistent slabs can be initiated by large triggers such as surface avalanches or cornice failures.
Weather Forecast
A little precip. and more reasonable winter temps expected into the weekend before we move back into another cold, high pressure.
Friday: Sunny with cloudy periods. Temp: High -21 C. Light ridge wind.
Saturday: Cloudy with sunny periods and isolated flurries. Trace of new. Low -29 C, High -21 C. Wind SW: 20 km/h. Alpine temperature inversion.
Snowpack Summary
Cold temps are penetrating deep into the upper snowpack, promoting widespread faceting. Pockets of wind slab are present on all aspects, tree line and above. The mid-pack is supportive with the Dec 1 interface down ~40 cm in most locations. Basal faceting continues below the Nov 5 crust potentially amplifying the deep persistent slab problem.
Avalanche Summary
Minimal natural activity observed on patrol. A large avalanche was seen mid-week in steep, shallow and rocky terrain. View min report here.
There has been inconsistence natural activity on the Nov 5 basal layer. When triggered, the slides are large and destructive. It's not yet open season, remain cautious and analytical when choosing your line.