Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible - Likely
- Taille
- 1–2
New wind slabs 20-30cm thick in alpine areas.
Bulletin d’avalanche
Voir sur la carteKananaskis
Feb 19 – 20, 2017Alberta Parks
Archivé · expiré 10 years ago
Danger d’avalanche
Mon
Tue
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
Points saillants
Travel is much better below treeline. Exposure to large overhead hazards still a concern because of a weak faceted basal snow pack.
Problèmes avalancheux
Persistent Slabs
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 2–3
Alpine and treeline areas have a sun crust on steep solar aspects up to 2400m. The deeper layers were insulated from the warmth and remain the same as they were before. Inspect this interface for signs of weakness.
Deep Persistent Slabs
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 2–4
Past avalanches have stepped to this layer. Thin areas and transitional terrain remain a concern.
Confidence
-
Weather Forecast
Temperatures on Monday will be about -9c in the Alpine. Winds are expected to be light to moderate out of the SW with only a trace of snow forecast. Freezing level is supposed o be 1500m.
Avalanche Summary
No new natural avalanche activity was observed over the past 24hrs.
Snowpack Summary
An average of 10-20cm of recent snow is now overlying a widespread temperature crust up to 2000m and up to 2400m on solar aspects. In the Alpine, you can find thin storm slabs(up to 30cm thick). Just below this temperature crust, there is a well settled upper snowpack still sitting on a weak faceted basal layer (down approx. 100-120cm). This weak basal layer is still giving the forecasters little confidence in exposing ourselves to large terrain overhead. Good skiing was found in open areas at treeline and below.