Avalog
Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Register
Login
Archived

Avalanche Forecast

Dec 18th, 2017–Dec 19th, 2017
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: South Coast.

Fresh storm slabs may bond poorly to the latest melt-freeze crust. Watch for how the new snow is bonding to the old surface.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

Active weather returns on Tuesday with moderate amounts of snow and cool temperatures. TUESDAY: Snow. 5-10cm overnight with 10-15cm accumulation throughout the day. Ridge wind moderate from the east. Temperature near -2. Freezing level 500 m.WEDNESDAY: Sunny with cloudy periods. Ridge wind moderate northerly. Freezing level 600 m.THURSDAY: Cloudy with isolated flurries. Ridge wind moderate from the north west. Temperature near -3. Freezing level 400 m.

Avalanche Summary

On Sunday, skiers were able to trigger Size 1 storm slabs on westerly aspects near tree line in the North Shore mountains. Since then, rain and subsequent cooling temperatures have 'locked up' the upper snowpack and avalanche activity has ceased.

Snowpack Summary

Temperatures got quite warm at the tail end of Sunday's storm, with up to 30mm rain falling on 15-20cm snow. Clearing overnight into Monday morning resulted in a widespread melt-freeze surface crust. The rained-on snow from the weekend is bonding well to the previous melt-freeze crust from early December's warm weather.Below tree line the snow pack is thin and there are many early season hazards. Snowpack depths range from 40 cm at 800 m elevation to 200 cm at 1220 m.

Avalanche Problems

Storm Slabs

Tuesdays's storm snow will be falling on a widespread melt-freeze crust that exists to upper tree line elevations. Keep a close eye on how the new snow is bonding to the old surface.
Watch for signs of instability such as whumpfing, cracking or recent natural avalanches.Avoid steep convex slopes.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2