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Archived

Avalanche Forecast

Feb 13th, 2016–Feb 14th, 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
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

Regions: Kootenay Boundary.

A mild spring-like pattern continues. Avalanche danger will vary depending on aspect, elevation, and time of day. Stay tuned-in to signs of instability.

Confidence

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

Weather Forecast

A series of moist and mild weather systems is tracking onto the BC Coast under a southwesterly flow. Light or locally moderate precipitation is expected to make it inland with each pulse. Generally, we should expect 5-10 mm each day with the daytime freezing level hovering around 1600-1800 m. Ridge winds should be from the W-SW, peaking at strong with the passage of each system. Currently it looks like a good chance of some sunshine on Monday afternoon.

Avalanche Summary

There were no new reports of avalanches on Thursday or Friday.

Snowpack Summary

10-20 cm of new snow sits on a supportive crust at and below treeline, a breakable crust on south-facing slopes in the alpine, buried surface hoar in sheltered terrain, or wind affected surfaces. Moderate southerly winds may have created fresh dense wind slabs on exposed leeward slopes. An older buried crust can be found down 40cm extending 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, especially during periods of warming or rapid loading. A rain crust from early December sits near the base of the snowpack.

Avalanche Problems

Storm Slabs

New snow may form a touchy slab resting on recently buried surface hoar or a slick rain crust. Expect dense wind slabs to form in exposed N-SE aspects at and above treeline.
Be cautious as you transition into wind affected terrain.>Use ridges or ribs to avoid pockets of wind loaded snow.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3

Loose Wet

Loose wet sluffs are possible during the day as temperatures rise, especially if it's raining or sunny.
Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2