Archived

Avalanche Forecast

Nov 29th, 2013–Nov 30th, 2013

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

Treeline

3: Considerable

The avalanche danger rating at treeline will be considerable

Below Treeline

1: Low

The avalanche danger rating below treeline will be low

Alpine

3: Considerable

The avalanche danger rating in the alpine will be considerable

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

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: Northwest Coastal.

Confidence

Fair - Due to the number and quality of field observations

Weather Forecast

Saturday: A series of Pacific frontal systems will continue to deliver snow with strong winds to the higher elevations: Rain in the valleys with freezing levels forecast to rise to 1500 metres, strong SW winds with up to 50 cm forecast for higher elevations.Sunday: Cold arctic air moves south from the Yukon bringing freezing levels down to valley bottoms.Monday: Dry arctic air will dominate the region.

Avalanche Summary

No avalanches reported yet, however, expect activity on wind slabs that develop during the storm. The added load of new snow and wind transported snow may overload weak layers.

Snowpack Summary

New snow and winds are creating wind slabs at upper elevations. Rain at lower elevations will continue to saturate the snowpack. You may find a weakly bonded layer about 40cm below the surface as well as the early season crust closer to the ground. These layers may be gaining strength, but could become quite reactive with the new snow loading.

Avalanche Problems

Wind Slabs

The incoming storms and high winds will change the situation as it loads buried weak layers. A weak layer at around 40cm from the surface as well as the early season crust closer to the ground could become quite reactive with the new snow loading.

The new snow will require several days to settle and stabilize.>Be aware of the potential for wide propagations due to the presence of hard windslabs.>Minimize exposure during periods of heavy loading from new snow, wind.>

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 5