Cornices
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2–3
Cornice failures are more likely with warm alpine temperatures.
Avalanche forecast
View on mapJasper
May 4 – 5, 2017Parks Canada
Archived · expired 9 years ago
Avalanche danger
Sat
Sun
Alpine
No rating
Treeline
No rating
Below
No rating
Highlights
Still looks like winter in the higher elevations but change is coming rapidly. Significant rain and freezing level rising to mountain top.Hazard rating rising to Extreme for Friday, all day. Good day to stick to riding on the ski hill.
Avalanche problems
Loose Wet
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible - Likely
- Size
- 1–2
Freezing overnight temperatures decrease this danger in the morning, it increases with daytime heating, sun and rain. Most widespread during the late afternoon on solar facing slopes. Sluffs from rocks can trigger large slides once the snow is wet.
Wet Slabs
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 1–3
Large wet slabs up to size 4 have been observed on all aspects and elevations. Even small wet slabs can be quite destructive due to their density. Avoid traveling through avalanche terrain during the heat of the day.
Weather Forecast
Progressive warming and significant precipitation forecast through the bulletin region for the weekend. Expect strong radiation with any direct sun. Freezing level rising to 3500m.
Snowpack Summary
Spring conditions on all aspects and elevations with a melt freeze crust that is dependent on overnight freezing conditions. The snowpack is moist to wet snow to ground below this crust.
Avalanche Summary
Avalanche activity will increase after warm nights and/or with thermal inputs such as rain, solar radiation and daytime warming. The avalanche danger will be lowest after cold nights and strong crust formation and will increase into the afternoon and evening before sunset. Likely trigger spots are rocks, cliffy terrain and shallow snowpack areas.