Storm Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible - Likely
- Taille
- 1–3
15 to 30cm's of recent storm snow is bonding poorly to previous surfaces and remains reactive to skier triggering.
Bulletin d’avalanche
Voir sur la carteBanff Yoho Kootenay
Dec 26 – 27, 2014Parks Canada
Archivé · expiré 12 years ago
Danger d’avalanche
Fri
Sat
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
Points saillants
The skiing has improved dramatically due to the recent snow, however there is a poor bond at the storm snow interface which will persist for some time. Avoid larger features, and steeper terrain. There is lots of good riding on low angled terrain.
Problèmes avalancheux
Deep Persistent Slabs
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Unlikely - Possible
- Taille
- 1–3
A weak and facetted basal layer exists at the bottom of the snowpack. Smaller storm snow avalanches may step down to this weak facetted layer.
Weather Forecast
Light snow flurries with sunny breaks, light W to NW winds, and temperatures between -5 and -15'C are forecast for the next several days.
Snowpack Summary
At tree line 10 - 30 cm of snow has fallen since Dec 23, with the heaviest snowfall occurring in Yoho Park. This new snow overlies the Dec 18 layer which consists of crust, facets and/or surface hoar depending on the location. A poor bond exists at this interface. At the base of the snowpack weak crusts and facets exist which are still a concern.
Avalanche Summary
Several avalanches up to Class 2.5 (with propagations up to 200 m) were observed running in the recent storm snow in Yoho Park on Dec 24th. Lake Louise ski hill also reported several natural and skier controlled avalanches up to size 2.5 within the past 48hrs, running in the new storm snow and occasionally stepping down to the basal facets/crusts.
Confidence
Due to the number of field observations