Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
Archived

Avalanche Forecast

Apr 18th, 2014–Apr 19th, 2014
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Jasper.

Daytime heating and direct solar exposure will rapidly increase the avalanche danger.  Plan to be off slopes if moist or wet snow conditions are encountered.  Avalanche control planned on Hwy 93 between Parkers and Weeping Wall late Saturday PM. 

Weather Forecast

Rain/snow showers to continue this evening and then skies will clear overnight bringing cool temps that will likely develop a crust from treeline to valley bottom.  Mostly clear skies Saturday with warming temperatures.  Similar conditions expect through Monday however overnight temperatures may not be cold enough to develop a significant crust.

Snowpack Summary

Temps peaked well above freezing Friday PM reaching into the alpine. This will create a crust on most aspects to treeline (TL) on solar aspects in the alpine as temps cool overnight. Moist snow below the crust extends into TL. The mid-pack is well bonded and warm. The base is weak facets in most locations. Cornices are large.

Avalanche Summary

2 new sz 2 slab avalanches ~ 50 - 100 cm deep where observed on SW TL aspect in the Icefields area, these went on an old snow interface, likely the Feb 10th layer. Several loose dry releases produced avalanches to sz 1.5 out of steep alpine terrain on SW aspects. Numerous small loose wet avalanches were reported on all aspects to treeline.

Confidence

Freezing levels are uncertain on Saturday

Avalanche Problems

Loose Wet

Daytime heating and direct solar radiation will deteriorate the crust by mid afternoon and avalanches are likely after this time. Steep solar aspects have the greatest likelihood.
Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.Start and finish early before the surface crusts melt.

Aspects: North, North East, East, South East.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Deep Persistent Slabs

Shallow rocky areas are likely trigger spots on steeper loaded terrain features.
Avoid convexities or areas with a thin or variable snowpack.Be aware of thin areas that may propogate to deeper instabilites.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3