Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2.5
Up to 50cm of recent snow followed by strong winds has built thick slabs.
Avalanche forecast
View on mapJasper
Feb 8 – 9, 2019Parks Canada
Archived · expired 8 years ago
Avalanche danger
Sat
Sun
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
2 · Moderate
Highlights
Human triggering remains a possibility. Assess the stability before committing to avalanche terrain. Ice climbers should be wary of loose dry avalanches in gulleys.
Avalanche problems
Loose Dry
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible - Likely
- Size
- 1–1.5
Expect sluffing out of steep rocky terrain if the sun is on it.
Deep Persistent Slabs
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 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!