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

Avalanche Forecast

Feb 20th, 2015–Feb 21st, 2015
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

Wind slabs and fragile cornice growth will require extra caution today.

Weather Forecast

Mainly cloudy today with some sunny periods and nil precipitation. Winds NW 15-30, freezing levels rising to 1400m and alpine high temperature at -4 C.  A building high pressure ridge arrives over the area tomorrow bring cold, clear and dry conditions for the next several days.

Snowpack Summary

Difficult travel and ski conditions below 1900m where a light dusting of new snow sits on a bulletproof crust. Above tree line, 20-25cm of light snow sits over the Feb 14 crust. Persistent weak layers down 1-1.5m are stubborn to trigger. Mid and lower snowpack is well settled. Over night winds likely formed slabs on lee slopes above tree line.

Avalanche Summary

No new avalanches were observed yesterday. Suspect that overnight winds contributed to small loose snow avalanches in steep terrain.

Confidence

Avalanche Problems

Wind Slabs

Strong and steady overnight winds heave caused wind slab development on lee features. If triggered, winds slabs may propagate larger than expected on a buried crust up to 2200m. Fragile cornice growth at ridge line will be touchy today.
Be cautious as you transition into wind affected terrain.Stay well to the windward side of corniced ridges.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Persistent weak layers down ~1 to 1.5m will likely need a large load such as a cornice failure to be triggered. A light load, like you, may be able to trigger them from shallow areas. When triggered these layers continue to propagate widely.
Be aware of thin areas that may propogate to deeper instabilites.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 3 - 4