Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2.5
This weak layer, buried 20-40cm deep and human triggering remains possible, particularly in shallow rocky start zones.
Avalanche forecast
View on mapJasper
Feb 18 – 19, 2024Avalanche Canada
Archived · expired 3 years ago
Avalanche danger
Tue
Wed
Alpine
2 · Moderate
Treeline
1 · Low
Below
1 · Low
Highlights
Be wary of the lurking persistent and deep persistent problems and continue to practice safe travel habits. Be vigilant for shallow spots that could be likely triggering locations.
Avalanche problems
Deep Persistent Slabs
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–3
The base of the snowpack is inherently weak and untrustworthy. Human and natural triggering of these basal facets remains possible.
Confidence
Moderate
Avalanche Summary
No recent avalanches have been observed.
Snowpack Summary
A suncrust has been forming on the snow surface on solar aspects from recent clear days. 15-25cm of snow overlies the Feb 3rd crust, which ranges from 1-3cm thick in the alpine. On shaded aspects it exists up to 2500m and is breaking down due to the cold temperatures. On solar aspects it is up to 2800m. At lower elevations it is 15-20cm thick. The Persistent and Deep Persistent weak layers continue to produce whoomphing and sudden fractures in tests.
Weather Summary
The Mountain Weather Forecast is available at Avalanche Canada https://avalanche.ca/weather/forecast
Sunday
A mix of sun and cloud. No precipitation and light ridge wind. Alpine temperature: High -2 °C. Freezing level: 1900 metres.
Monday
Mainly cloudy. No precipitation and light southwest wind. Alpine temperature: Low -9 °C, High -5 °C. Freezing level: 1500 metres.
Terrain and Travel Advice
- Avoid shallow snowpack areas, rock outcroppings and steep convex terrain where triggering is most likely.
- Minimize exposure to overhead avalanche terrain, large avalanches may reach the end of runout zones.