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Archived

Avalanche Forecast

Apr 10th, 2018–Apr 11th, 2018
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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

Regions: Glacier.

Avalanche activity will increase over the day as an intense warm and moist storm arrives midday. Little to no overnight refreeze will allow the warm temps and rain to rapidly destabilize the snowpack tree line and below.

Weather Forecast

Cloudy today with snow and rain arriving midday as an intense, warm and moist pacific low pushes inland. The alpine will reach above zero temperatures as the freezing level rises to 2500m. Winds during the frontal passage of the storm will be 30km/hr from the south gusting to 50km/hr. Wednesday will see clearing skies, a drop in temp and wind.

Snowpack Summary

The top 20cm of snow was moist up to 2100m yesterday and up to 3000m the day before on all aspects. Minimal overnight recovery below tree line as freezing levels remained around 0 degrees. Well-settled mid and lower snowpack with the Mar 15 crust complex down 70-90cm on solar aspects.

Avalanche Summary

Numerous sz 2-3 avalanches yesterday and over 40 sz 2-3 avalanches on Sunday occurring in the moist storm snow.Avalanche activity is expected to increase again today as a warm and moist weather system will arrive early this afternoon.Artillery avalanche control is planned for this afternoon. Check DriveBC for the latest updates.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Tuesday

Avalanche Problems

Loose Wet

Expect the moist surface snow to destabilize rapidly as the temperature rises and snow/rain fall amounts increase.
Use extra caution on slopes if the snow is moist or wet.Be wary of slopes that did not previously avalanche.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 3

Persistent Slabs

70-90cm of settled snow sits on the mid March crust/facet combo and fails suddenly in the mod-hard range in stability tests on solar aspects. This layer might become more active with the incoming snow/rain and rising temperatures.
Use extra caution on slopes if the snow is moist or wet.Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.

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

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3