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Archived

Avalanche Forecast

Dec 6th, 2018–Dec 7th, 2018
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
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
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

Regions: Glacier.

Always exercise safe back country travel techniques even when the hazard is low. Many early season hazards exist at all elevations.

Weather Forecast

Sunny skies, cold temperatures and light winds are forecasted for today. The alpine may reach -8 degrees and the freezing level could rise to 600m. We may see an inversion settle in on Friday evening and the next storm is forecasted to reach Rogers Pass on Monday morning. Models are forecasting 20 to 30cm of new snow and the FL rising to 1000m.

Snowpack Summary

Surface hoar is growing in sheltered areas while a thin sun crust exists on steep solar aspects. 25-40 cm of storm snow overlies the Nov 21 SH, this layer has been observed up to 15mm and sits on a sun crust on steep solar aspects. The mid-pack is well settled and the Oct 26th crust sits on or near the ground at treeline and above.

Avalanche Summary

No new natural avalanches have been observed in the Highway Corridor or reported from the Backcountry in the last three days.

Confidence

Avalanche Problems

Persistent Slabs

This layer can be found at tree line and in the alpine but spotty in its distribution. It will be most reactive in areas where wind loading has occurred on lee aspects and on steep solar aspects where the surface hoar sits on a crust.
Avoid thin, rocky or unsupported slopes.Watch for shooting cracks or stiffer feeling snow. Avoid areas that appear wind loaded.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2