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Avalanche Forecast

Archived

Dec 15th, 2015–Dec 16th, 2015

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Inland.

You don't have to be an avalanche expert to submit to the MIN. If you've been out in the mountains, we'd love to hear about what you've seen.

Confidence

Low - Due to the number of field observations

Weather Forecast

Mainly clear skies are forecast for Wednesday and Thursday morning. Increased cloud is expected throughout the day on Thursday with up to 5cm of new snow falling between Thursday afternoon and Friday morning. Ridgetop winds should be light to moderate from the north on Wednesday, switching to strong and southwesterly with Thursday's snowfall. Freezing levels should hover around valley bottom for the forecast period. For a more detailed weather overview, check-out our Mountain Weather Forecast at: avalanche.ca/weather

Avalanche Summary

No recent avalanches have been reported from the region. This may speak more to a lack of observations rather than actual conditions. I would expect newly formed wind slabs to be sensitive to human triggering for the next few days in high elevation lee terrain.

Snowpack Summary

Remote weather stations indicate 5-12cm of new snow fell on Monday night. These new accumulations were likely redistributed by strong winds into new wind slabs at treeline and in the alpine. The few reports we've received suggest the height of snow at treeline is approximately 100cm. According to these reports, the mid-snowpack is mainly comprised of older settled storm snow, while weak facets exist at or near the ground.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.