Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible - Likely
- Taille
- 2–5
The new snow is sitting on a buried layer of surface hoar that may be at a critical depth for human triggered avalanches.
Bulletin d’avalanche
Voir sur la carteNorthwest Inland
Dec 10 – 11, 2015Avalanche Canada
Archivé · expiré 11 years ago
Danger d’avalanche
Sat
Sun
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
1 · Faible
Points saillants
The places you are going to find the best riding conditions in the wake of the storm are probably the same places where the danger from a layer of buried surface hoar is greatest.
Problèmes avalancheux
Storm Slabs
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Likely
- Taille
- 2–5
Winds shifted from west to east and may have reverse loading mid slope features.
Confidence
Low - Due to the number and quality of field observations
Weather Forecast
The next few storms are tracking to the south and are going to largely miss the Northwest regions. FRIDAY: flurries, light southwest wind, freezing level valley floor SATURDAY: isolated flurries, light east winds, freezing level valley floor. SUNDAY: clear, moderate northwest winds. Freezing level valley floor.
Avalanche Summary
The layer of buried surface hoar is my biggest concern. It is probably widespread and is reaching a burial depth that was associated with a rash of skier and remotely triggered avalanches in the deeper snowpack around Terrace last weekend.
Snowpack Summary
Up to 60cms of settled snow now sits upon a layer of buried surface hoar. This layer has the potential for remote triggering and wide propagations. It is likely to be lurking in most sheltered areas at tree-line although I suspect it extends well into the alpine. Variable winds are loading lee features. Below 1500m heavy rains have likely saturated the snow pack and may have formed a new rain crust.