Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 1–3
Windslabs building at treeline and above on lee aspects and while thin on Sunday afternoon, it is sensitive to triggering.
Avalanche forecast
View on mapJasper
Mar 26 – 27, 2017Parks Canada
Archived · expired 10 years ago
Avalanche danger
Tue
Wed
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
1 · Low
Highlights
Meow is not the time to be bold. Excellent creamy riding can be found on most moderate and low angle terrain.
Avalanche problems
Cornices
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible - Likely
- Size
- 1–3
Large cornices on ridge top lee features. Recent cornice failure has triggered large avalanches from alpine terrain.
Deep Persistent Slabs
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible - Likely
- Size
- 2–4
The deep persistent slab can be triggered by travelers from shallow or weak locations or naturally from large loads such as cornice failure or windslab avalanches. On Mar 25, skiers triggered a sz 3 on this layer.
Weather Forecast
Cloudy with sunny periods and isolated flurries on Monday. Moderate SW ridge top winds. Remaining relatively cool with forecasted alpine temperatures, -3 to -10.
Snowpack Summary
The main concern in the snowpack at tree-line and above is the deep persistent slab over weak facet layer at ground. This slab can be triggered by travelers from shallow or weak locations or naturally from large loads such as cornice failure or windslab avalanches. All steep loaded slopes that have not recently avalanched should be avoided.
Avalanche Summary
A size 3 skier accidental slab avalanche was reported Saturday afternoon north of the Icefields on a NE aspect at tree-line. Cycle continues, especially in the Alpine where new wind load is triggering deep slabs and cornice triggered slabs on North through West aspects, up to size 3 observed in field work today.
Confidence
Due to the number and quality of field observations