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 well into the terrain.
Avalanche forecast
View on mapJasper
Feb 6 – 7, 2019Parks Canada
Archived · expired 8 years ago
Avalanche danger
Thu
Fri
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
2 · Moderate
Highlights
Human triggering of recently overloaded weaknesses remains a possibility, assess the local snowpack before committing to avalanche terrain.
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
An upper level NW flow has brought "warmer" air and some cloud cover to the region. A low pressure center sliding down the coast later in the week will bring light precip Thursday.Weds: Sunny with cloudy periods. Alpine temperature: Low -23 C, High -15 C. Ridge wind light NW.A detailed mountain weather forecast is available from Avalanche Canada.
Snowpack Summary
50cm recent storm snow was followed by strong Northerly winds. This storm snow overloaded the Jan 18 persistent weakness (srfce hoar up to 10mm in sheltered areas at lower elevations, crust on steep solar slopes, and facets on Northerly alpine slopes), and the deep persistent weakness (basal facets - found predominantly in shallow snowpack areas).
Avalanche Summary
Avalanche control work Monday between the Icefields and Saskatchewan crossing, produced several large (size 2-2.5) persistent and deep persistent slab avalanches.A natural cycle of large slab avalanches occurred during the most recent storm.Help forecast - share observations HERE, on the Mountain Information Network!