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Archived

Avalanche Forecast

Nov 17th, 2016–Nov 18th, 2016
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Banff Yoho Kootenay.

There is decent snow cover for November at upper elevations with a supportive lower snowpack. Watch for isolated wind slabs which may be sitting over a rain crust depending on elevation and aspect. SH

Weather Forecast

Light winds ranging from S-SE Friday with more seasonal temperatures staying well below freezing compared to the warm temperatures we have had this past week. Only flurries for Friday and light snow amounts through the weekend.

Snowpack Summary

20-30cm of new snow at treeline from a storm at the start of the week was accompanied by moderate to strong SW to NW winds which formed some wind slabs at higher elevations. This new snow sits on the Nov. 12 crust (1-2cm thick ) which is present on all but high N aspects (not seen above 2400m on N. aspects) . Below this is a well settled snowpack.

Avalanche Summary

Sluffing in steep terrain and some small wind slabs over the Nov. crust noted. We have limited observations from high alpine areas.

Confidence

Due to the quality of field observations on Thursday

Avalanche Problems

Wind Slabs

New wind slabs have formed with the new snow. So far things seem to be bonding reasonably well to the buried Nov 12 crust however some skier triggering has been reported on this layer.
Use caution in lee areas. Recent wind loading have created wind slabs.Be careful with wind loaded pockets while approaching and climbing ice routes.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2