Archived

Avalanche Forecast

Nov 30th, 2017–Dec 1st, 2017

Alpine

3: Considerable

Treeline

2: Moderate

Below Treeline

1: Low

Alpine

3: Considerable

Treeline

2: Moderate

Below Treeline

1: Low

Alpine

2: Moderate

Treeline

2: Moderate

Below Treeline

1: Low

Regions: Sea To Sky.

Successive moderate storms will keep danger elevated, particularly in steep, wind-affected terrain. If the 24 hour snow amounts exceed 25 cm, bump avalanche danger up by one rating.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

Friday: 10-15 cm new snow with freezing levels around 1000 m. Strong southwesterly winds.Saturday: 10-15 cm new snow with freezing levels around 900 m. Moderate southerly winds.Sunday: Dry with some sunny breaks. Light northwesterly winds.

Avalanche Summary

Ski cutting produced soft slab avalanches up to size 1.5 in recent storm snow at treeline and alpine elevations on Tuesday and Wednesday. Similar activity is anticipated for Friday.

Snowpack Summary

Approximately 40-50 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 150 cm in sheltered treeline locations, although deeper (and shallower) spots certainly exist on account of the strong winds.

Avalanche Problems

Wind Slabs

Wind 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.

Use ridges or ribs to avoid pockets of wind loaded snow.Avoid steep lee and cross-loaded features

Aspects: North, North East, East, South East, South.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2