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

Avalanche Forecast

Dec 12th, 2015–Dec 13th, 2015
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Below treeline, the December 2nd surface hoar remains reactive to skier loads.

Weather Forecast

Mostly cloudy today with isolated flurries and freezing levels remaining below 1050m.  A pacific storm front will track into the area this evening bringing snow and strong SW winds.  Up to 15cm of new snow is expected with precipitation subsiding by early Monday morning.  Temperatures will remain cool.

Snowpack Summary

Up to 100cm of storm snow is settling into a slab. At treeline and below, this slab is sitting on the Dec 2nd surface hoar layer. The Dec 2nd persistent week layer remains reactive to stability tests in the hard range. On solar aspects in the alpine  the Dec 2nd layer is a sun crust.  15cm of recent snow now covers a supportive crust below 1700m.

Avalanche Summary

Explosive tests produced 2 size 1.5 avalanches triggered in the storm slab at treeline.  No other new avalanches were observed.

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Persistent Slabs

A 70-90cm slab sits on a suncrust on steep solar aspects and preserved surface hoar at and below treeline. This slab is well formed in areas influenced by strong winds. This layer is becoming less reactive in tests, but remains triggerable by skiers.
Ski short pitches and regroup in safe spots.Avoid open slopes and convex rolls at and below treeline where buried surface hoar may be preserved.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 2 - 3