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Archived

Avalanche Forecast

Nov 14th, 2017–Nov 15th, 2017
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
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Banff Yoho Kootenay.

New snow and wind are creating windslabs in the alpine. Expect sluffing in steep gully features above treeline.

Weather Forecast

The forecast region will be influenced by a trough late Wednesday. Expect to see a sharp drop in temperature with a steady feed of snowfall. Accumulations of up to another 20cm is expected by the end of Friday. Wind is primarily coming from the south and expected to be in the moderate range.

Snowpack Summary

5-10cm of new snow overnight brings the snowpack to ~70cm at treeline with up to 100 cm in alpine locations. Oct 31 crust is now buried 20-25cm down. Snowpack tests showed breaking below the Oct 31 crust today. The crust disappears on N aspects at ~2500m. Wind transport was observed in the alpine with a high likelihood of wind slab development.

Avalanche Summary

No new avalanches observed or reported today.

Confidence

Due to the number and quality of field observations on Tuesday

Avalanche Problems

Wind Slabs

Recent new snow and wind are making wind slabs more active. Watch for them in lee areas.
Be careful with wind loaded pockets while approaching and climbing ice routes.Use caution in lee areas. Recent wind loading has created fresh slabs.

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

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 2