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Archived

Avalanche Forecast

Dec 18th, 2015–Dec 19th, 2015
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Little Yoho.

People have started testing the waters in steeper terrain below treeline, but trust should come slowly as the Dec 3 layer is very prominent. Be curious about seeing if its there, and be conservative in your terrain choices. SH

Weather Forecast

Expect mainly cloudy conditions and a few cm every day through the forecast period . There will be light to moderate West winds and alpine temperatures in the -12 to -16C range for Saturday.

Snowpack Summary

In sheltered terrain between 1500m and 1850m, a 40-50cm soft slab sits over the large December 3rd surface hoar. No other significant layers have been observed. There is approximately 130-140cm at treeline.

Avalanche Summary

No new avalanches observed in past few days.

Confidence

Due to the number of field observations

Avalanche Problems

Persistent Slabs

A 40-50cm soft slab sits over the Dec 3rd surface hoar in many sheltered location between 1500 m and 1850m. Continue to treat all steep (35+ degree) open slopes below tree line with suspicion until you can rule out this weak layer.

  • Avoid open slopes and convex rolls at and below treeline where buried surface hoar may be preserved.
  • Dig down to find and test weak layers before committing to a line.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2