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

Avalanche Forecast

Nov 30th, 2013–Dec 1st, 2013
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
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
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

The avalanche hazard is on the rise. A storm is approaching and a surface hoar has recently been buried.

Weather Forecast

A pacific frontal system is approaching the interior tonight with the bulk of it arriving tomorrow during the day into Monday morning. Light amounts are expected tonight with more significant precipitation starting tomorrow morning. This storm precedes a high pressure ridge setting up on Tuesday bringing clear skies and cold arctic temperatures.

Snowpack Summary

10cm of new snow overlies a widespread surface hoar layer and facet layer. On steep south aspects this new snow sits on a surface hoar and sun crust layer. The November 12 surface hoar layer is down 40-100 cm. The snowpack has settled quite a bit in the last week and there's less than one meter of snow in most locations.

Avalanche Summary

No new avalanches yesterday.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

Avalanche Problems

Loose Dry

This new snow is sitting on good sliding surfaces like surface hoar or sun crust. Fast moving sluffs turning into loose avalanches may be easily triggered in steep terrain.
Avoid travelling on ledges and cliffs where sluffing may have severe consequences.Be aware of party members below you that may be exposed to your sluffs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2

Persistent Slabs

A surface hoar layer buried 40 to 100 cm has been observed throughout the Rogers Pass region. This layer is still within range of being triggered by a rider. 
Dig down to find and test weak layers before committing to a line.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3