Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 1–2.5
Up to 50cm of recent snow followed by strong winds has built thick slabs.
Bulletin d’avalanche
Voir sur la carteJasper
Feb 8 – 9, 2019Parks Canada
Archivé · expiré 8 years ago
Danger d’avalanche
Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
2 · Modéré
Points saillants
Human triggering remains a possibility. Assess the stability before committing to avalanche terrain. Ice climbers should be wary of loose dry avalanches in gulleys.
Problèmes avalancheux
Loose Dry
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible - Likely
- Taille
- 1–1.5
Expect sluffing out of steep rocky terrain if the sun is on it.
Deep Persistent Slabs
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 1.5–3.5
New snow with strong winds recently overloaded the deep persistent weakness in shallow snowpack areas.
Weather Forecast
Friday will be cloudy with sunny periods, no precipitation, alpine temperatures high -22 C, and light East ridge winds. Saturday will be sunny with cloudy periods, no precipitation, alpine temperature low -33 C and high -25 C with light East ridge winds.A detailed mountain weather forecast is available from Avalanche Canada.
Snowpack Summary
50cm from Feb 2nd was followed by strong Northerly winds. This snow overloaded the Jan 18 persistent weaknesses which is surface hoar 10mm in sheltered areas at lower elevations, crust on steep solar slopes, and facets on Northerly alpine slopes. A deep persistent basal facet and depth hoar weakness exists particularly in shallow snowpack areas.
Avalanche Summary
On Thursday, a few loose size 1.5 avalanches occurred on steep slopes below treeline. A large powder cloud was noted from steep westerly alpine terrain. Help forecast - share observations HERE, on the Mountain Information Network!