Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible - Likely
- Size
- 1–2
Expect slab development immediate to lee ridge lines and cross loaded features. Bonding should be suspect, progress cautiously into steeper terrain.
Avalanche forecast
View on mapJasper
Mar 4 – 5, 2016Parks Canada
Archived · expired 11 years ago
Avalanche danger
Fri
Sat
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low
Highlights
Avalanche problems
Persistent Slabs
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible - Likely
- Size
- 1–3
Persistent weak layers of decomposed surface hoar, facets, and depth hoar are in many locations. These layers have been stubborn to trigger underfoot but could be triggered by cornice failure or from shallow spot and release to ground.
Weather Forecast
Light scattered flurries for the next couple of days, increasing in intensity by the weekend, with amounts up to 10cm for Saturday. Winds light to moderate from the Southwest and freezing levels creeping up to treeline by Saturday. Cooler temperatures starting on Sunday.
Snowpack Summary
Weak crust on S through W aspects. Wind slab on lee aspects from previous SW winds and persistent slab in open areas at tree line. Poor travel conditions below tree line due to weak facetted snowpack. The Jan 28 SH/FC layer down 40-80cm remains a concern but is sporadically distributed.
Avalanche Summary
Several reports of remotely triggered slab avalanches in the alpine in wind loaded areas up to size 2 over the past 48 hours. These slides went on old snow and are especially prevalent in areas that have not seen skier traffic this winter.