Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Likely - Very Likely
- Taille
- 1–4
New wind slabs may form in exposed lee and cross-loaded terrain.
Bulletin d’avalanche
Voir sur la carteNorthwest Coastal
Mar 20 – 21, 2012Avalanche Canada
Archivé · expiré 15 years ago
Danger d’avalanche
Thu
Fri
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Problèmes avalancheux
Cornices
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible - Likely
- Taille
- 1–6
Cornices are reported to be very large and potentially unstable at this time. A cornice fall could be destructive by itself, and may also act as a trigger on the slope below.
Confidence
Fair - Forecast snowfall amounts are uncertain
Weather Forecast
Wednesday: Light convective snowfall - 5-15cm. The freezing level rises to 400-500m during the day. Winds are moderate from the SW. Thursday: Isolated flurries with possible sunny breaks in the afternoon. Freezing level rising to 600m. Winds are light from the SE. Friday: A mix of sun and cloud. Freezing level rising to 600-800m during the day.
Avalanche Summary
There has been very little recent avalanche activity aside from a few cornice failures, most of which did not trigger a slab below. Expect to find small pockets of wind slab in steep exposed terrain that could be triggered.
Snowpack Summary
5-15cm of new snow sits on the previous snow surface which included a sun crust on southerly aspects, surface facets or surface hoar in cool shady areas, and pockets of wind slab in exposed terrain. A variety of potential weak layers exist between 60 and 120cm deep. These include surface hoar or facets. There has been no recent activity on these layers but they could wake up with heavy triggers like a large cornice chunk or a snowmobile digging its track in. Cornices in the region are reported to be very large and potentially unstable.