Avalanche Forecast

Issued: Dec 4th, 2018 3:34PM

The alpine rating is moderate, the treeline rating is low, and the below treeline rating is low. Known problems include Wind Slabs.

Avalanche Canada ghelgeson, Avalanche Canada

Strong northerly wind Tuesday night is expected to create fresh wind slabs in the alpine which may be sensitive to human triggering. The breakable crust at lower elevation means that stumps, open creeks and rocks are a real concern below treeline.

Summary

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.  TUESDAY NIGHT: Freezing level at valley bottom, strong north wind at ridgetop, light northerly wind below treeline, no significant precipitation expected.WEDNESDAY: Scattered cloud cover, freezing level at valley bottom, light variable wind, no significant precipitation expected.THURSDAY: Scattered cloud cover, freezing level at valley bottom, light southwest wind, no significant precipitation expected.FRIDAY: Broken cloud cover, freezing level at valley bottom, strong south/southwest wind, no significant precipitation expected.

Avalanche Summary

No recent avalanches have been reported. However, we currently have very limited observations. If you have been out, please submit any observations to the Mountain Information Network (MIN).

Snowpack Summary

Surface Hoar is beginning to form on the surface as indicated by this MIN report. There is up to 20 cm of recent storm snow sitting on a hard crust at upper elevations. Expect to find an early season crust near the bottom of the snowpack in many areas. Recent reports suggest there is an average of 60 to 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

An icon showing Wind Slabs
Although there is not a lot of fresh snow, strong north wind Tuesday night may create fresh wind slabs. These would hide old wind slabs that may remain sensitive to human triggering both immediately lee of ridgecrest and in extreme terrain.
Stay alert to changing conditions with elevation.Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: East, South East, South, South West, West.

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 1.5

Valid until: Dec 5th, 2018 2:00PM