Archived

Avalanche Forecast

Dec 10th, 2014–Dec 11th, 2014

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

3: Considerable

The avalanche danger rating at treeline will be considerable

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: South Coast.

Fresh storm and wind slabs will likely take a few days to gain strength.

Confidence

Fair - Due to the number of field observations

Weather Forecast

Expect another 10-20 cm of snow on Thursday falling mainly in the morning and afternoon with freezing levels around 1400 m, except in the Coquihalla area where it is likely to remain warm and wet. Expect moderate to strong southerly ridge top winds associated with the precipitation. A drying, clearing, and cooling trend is expected to start on Friday with isolated flurries, freezing levels dropping as low as 1000 m and winds easing to light westerlies by the evening. At this point Saturday is looking mostly dry with a mix of sun and cloud, freezing levels below 1000 m and light ride top wind.

Avalanche Summary

No new reports of avalanches. Please let us know what you're seeing out there. Submit your observations to the Mountain Information Network.

Snowpack Summary

Rain-soaked snow should soon be frozen into a solid surface crust that extends as high as treeline elevations with 15-20 cm of fresh snow on top, depending on elevation, in the northern part of the region. Meanwhile at alpine elevations fresh storm and wind slabs have likely developed and weakness deeper in the snowpack, such as crusts with associated facets, likely remain under critical loads. Snow pack depth and snow quality drastically diminishes as you drop below treeline.

Avalanche Problems

Storm Slabs

Fresh new storm and wind slabs are likely susceptible to human triggering especially on the northwest through northeast side of terrain breaks. Facet/crust weaknesses deeper in the snowpack are likely under critical loads at treeline and above.

Use ridges or ribs to avoid wind loaded and cross loaded slopes.>Choose well supported terrain without convexities.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 4

Loose Wet

Particularly in the southern part of the region where warm and wet weather is expected to continue. Watch for wet loose sluffs in steep rocky terrain and gullies.

Be aware of party members below you that may be exposed to your sluffs.>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 - 3