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Archived

Avalanche Forecast

Feb 12th, 2016–Feb 13th, 2016
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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Kootenay Boundary.

Cooler temperatures should help stabilize the snowpack, but the snow quality might be less than desirable in many places. 

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

Saturday: Cloudy with a chance of flurries. The freezing level drops to 1200-1300 m. Ridge winds are light or moderate from the W-NW. Sunday: Moderate snow overnight (around 10-15 cm), then cloudy with flurries and sunny breaks. The freezing level rises back to 1500 m and winds are moderate from the SW. Monday: Moderate or locally heavy precipitation. The freezing level shoots to around 1800 m and ridge winds are strong from the W-SW.

Avalanche Summary

There were no new reports of avalanche activity on Thursday. Earlier in the week there were several loose wet slides up to size associated with warm temperatures and strong sunshine.

Snowpack Summary

Around 10 cm of moist snow (at the time of writing) overlies a melt-freeze crust at lower elevations and on solar aspects. Moderate southerly winds have probably created fresh dense wind slabs on exposed leeward slopes. An older buried crust can be found down 40cm, and it extends well up into the alpine. Below this, a thick slab rests on a layer of surface hoar that was buried earlier in January. This layer is 80-130 cm deep and continues to pose a low probability/ high consequence threat, producing sudden planar fractures in snowpack tests under moderate to heavy loads. It should remain on your radar until the snowpack cools off again. A rain crust from early December sits near the base of the snowpack.

Avalanche Problems

Wind Slabs

Fresh pockets of dense wind slab may be found in exposed leeward terrain near ridge crests.
Be cautious as you transition into wind affected terrain.>Use ridges or ribs to avoid pockets of wind loaded snow near ridge crests.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3