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Avalanche Forecast

Archived

Dec 3rd, 2018–Dec 4th, 2018

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Coastal.

We're working with pretty limited observations, but watch for tired old wind slabs up high. The breakable crust at lower elevation means that stumps, open creeks and rocks are a real concern below treeline.

Confidence

Low - Due to the number of field observations

Weather Forecast

The high amplitude ridge sitting off the BC Coast is expected to deflect any potential storm systems away from the Northwest this week. The forecast period is marked by cooler temps, clear skies and no significant precipitation, but that could change this weekend. MONDAY NIGHT: Freezing level at valley bottom, light northerly wind, no significant precipitation expected. TUESDAY: Scattered cloud cover initially, clearing throughout the day, freezing level at valley bottom, light northerly wind, no significant precipitation expected.WEDNESDAY: Scattered cloud cover, freezing level at valley bottom with potential for a temperature inversion which may bring temperatures to near zero between 1200 and 2000 m, light northwest wind, no significant precipitation expected.THURSDAY: Clear sky, freezing level at valley bottom with potential for a temperature inversion which may bring temperatures to near zero between 1200 and 2000 m, light northwest wind, no significant precipitation expected.

Avalanche Summary

No new avalanches have been reported recently. Please post your observations to the Mountain Information Network.

Snowpack Summary

Surface hoar is beginning to form on the surface as indicated in this MIN report from the adjacent Northwest Inland region. 10-15 cm of recent storm snow is sitting on a thick, hard crust. In some locations there is an early season crust with facets near the bottom of the snowpack. Check out this MIN report from the Anderson Cabin near Terrace.There is an average of 70-120 cm of snow in the alpine. This decreases dramatically with elevation where the primary hazards are rocks, stumps and open creeks.We currently have very limited snowpack observations, so it is critical to supplement this information with your own observations.

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.