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Archived

Avalanche Forecast

Dec 8th, 2017–Dec 9th, 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
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
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

Regions: Banff Yoho Kootenay.

Beautiful weather has us in a holding pattern. Backcountry users should monitor the weather stations and keep an eye on temperatures with the current inversion (cold in the valleys, warm up top), especially ice climbers. SH

Weather Forecast

The ridge will break down slightly for Saturday. There will still be an inversion with cooler valley temperatures and warmer in the in the alpine, although temperatures may not go quite as high above freezing as they did the last 2 days. Winds look to be in the light to moderate range. No snow is in the forecast for the next week.

Snowpack Summary

Sun crusts are developing on steep south slopes with a temperature inversion. Surface hoar up to size 20 has formed. Below 2500m, 30 - 50 cm of snow lies over the Nov 27th and Nov 23rd crusts. Both of these now overlie the Halloween crust/facet layer that sits 30-50cm above the ground.

Avalanche Summary

Given the heat in the alpine its a bit of a surprise there have been very few avalanches observed or reported at the time of writing, probably due to the short days this time of year.  Some very small loose wet avalanches were noted up Hwy 93N on terrain that was in the sun, sheltered, and below steep cliffs (climbing terrain) up high.

Confidence

Avalanche Problems

Persistent Slabs

Natural avalanche activity has tapered, however shallow alpine areas warrant caution. Uncertainty around the Halloween layer remains especially with the warmer temperatures changing conditions at upper elevations.
Be alert to conditions that change with elevation.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 3