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Avalanche Forecast

Archived

Apr 8th, 2017–Apr 9th, 2017

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.
Below Treeline
Natural avalanches unlikely.

Regions

Kootenay Boundary.

Observations from the region have been limited recently. If you are out in the mountains, please consider posting your observations to the Mountain Information Network and help us improve the bulletin. Click here for more details.

Confidence

Low - Due to the number of field observations

Weather Forecast

SUNDAY: Mix of sun and cloud / Light to moderate southwest wind / Alpine temperature -4 / Freezing level 1400mMONDAY: Mix of sun and cloud / Light southwest wind / Alpine temperature -5 / Freezing level 1400mTUESDAY: Mix of sun and cloud / Light to moderate southeast wind / Alpine temperature -2 / Freezing level 1700m

Avalanche Summary

There have been very few reports coming from the region in the past week. On Sunday, the main concern is lingering wind slabs in high elevation north facing terrain and the possibility of large overhanging cornices releasing with overall warm temperatures and the sun coming out over the coming days.

Snowpack Summary

A series of Pacific frontal systems have passed through the region in the latter half of last week accumulating 15-25cm of moist new snow tree line and above. In high elevation terrain, recent moderate southerly winds and new snowfall has formed wind slabs in leeward features. At lower elevations and on sun exposed slopes, there is likely moist or wet snow sitting on top of several well bonded crust layers in the upper snowpack.

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.