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Archived

Avalanche Forecast

Dec 2nd, 2017–Dec 3rd, 2017
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
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: Glacier.

Recent storm snow has settled into a touchy soft slab. This will be most reactive at ridgetop or in steep unsupported terrain.

Weather Forecast

A slow moving low pressure system offshore is tracking Southeast today, bringing potential for convective flurries and a mix of sun and cloud.  We could receive another 5 or more cm's today with freezing level at 1000m and light SW winds gusting to 40kph. High pressure is expected to build on Sunday, leaving dry conditions for the rest of the week.

Snowpack Summary

25cm of new snow from the last 24 hrs sits on the previous storm snow. The November 26th crust layer is easily identified down 65cm. It separates the moist and warm lower snowpack from the cold and dry upper snowpack. Recent stability tests show a generally good bond between the Nov 26 and the dry snow above.

Avalanche Summary

Reports came in late yesterday of a natural avalanche cycle triggered by new snow and wind loading. The avalanche path 'Frequent Flyer' ran during the day on Dec 1, pushing through alders and burying the skintrack 7-10m wide. A good report here. Avalanche activity is expected to continue today.

Confidence

Forecast snowfall amounts are uncertain

Avalanche Problems

Storm Slabs

The steady accumulation of new snow is settling into a reactive storm slab. It will be most reactive at ridgetop and in steep unsupported terrain. Expect avalanches to be run fast and to the bottom of run-outs. Be aware of overhead exposure!
Be careful with wind loaded pockets, especially near ridge crests and roll-overs.Evaluate unsupported slopes critically.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 2