Avalanche Forecast

Issued: Nov 28th, 2017 4:05PM

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

jfloyer, Avalanche Canada

Sea To Sky.

Successive storms will result in elevated danger, particularly in exposed, windy locations. There's a chance it may start to snow heavily a little earlier than expected on Wednesday. If so, adjust your objectives accordingly.

Summary

Confidence

Moderate - Timing of incoming weather systems is uncertain

Weather Forecast

A series of storms is expected to bring further snow and wind to this region.Wednesday: Light snow during the day, getting heavier in the afternoon. Expect around 5 cm new snow during the day, then another 15-20 cm on Wednesday night. Freezing levels around 1100 m. Moderate westerly winds, becoming strong southwesterly later on.Thursday: 5 cm or so new snow. Freezing levels around 1000 m. Moderate southwesterly winds.Friday: 10-15 cm new snow. Freezing levels around 900 m. Strong southwesterly winds.

Avalanche Summary

Natural avalanches were reported up to size 2.5 on Sunday. Activity diminished on Monday following a drying and cooling trend, but is likely to pick up again, especially in steep, wind affected terrain for Tuesday.

Snowpack Summary

Approximately 20-30 cm new snow now sits on top of a rain crust (or multiple crusts) that formed during the recent wet weather. Strong winds have blown snow around in exposed areas creating drifts and scoured areas. Snowpack depths are typically around 140 cm in sheltered treeline locations, although deeper (and shallower) spots certainly exist on account of the strong winds.

Problems

Storm Slabs

New storm slabs are building over a crust layer. This layer may slide easily, particularly on steep convex terrain or where the wind has blown it into more cohesive slabs.

The new snow will require several days to settle and stabilize.Avoid steep lee and cross-loaded features

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 2

Valid until: Nov 29th, 2017 2:00PM