Archived

Avalanche Forecast

Nov 26th, 2014–Nov 27th, 2014

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

Below Threshold

The avalanche danger rating below treeline will be below threshold

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

Below Threshold

The avalanche danger rating below treeline will be below threshold

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

Below Threshold

The avalanche danger rating below treeline will be below threshold

Regions: Northwest Coastal.

Expect variable conditions as outflow winds kick up. Some slopes could be blown bare while others see deep wind slabs form.

Confidence

Fair - Due to the number of field observations

Weather Forecast

Summary: Clearing and cooling with invading arctic airmass. Expect outflow winds to pick up in coastal inlets and valleys. Thursday: Clearing. Temperatures at 1500 m drop close to -20. Winds are moderate to strong from the northeast. Friday and Saturday: Mainly sunny and cold. Winds are strong from the NE with very strong outflow winds in valleys and inlets.

Avalanche Summary

Reports from Monday include a few small 10-20cm deep naturally releasing storm and wind slabs north of Stewart, as well as some sloughing on isolated steep slopes below treeline. We have had no reports from popular recreational spots in the region. Let us know what you are seeing at [email protected].

Snowpack Summary

As we begin our forecasting season, we are working with limited information from the field. Early reports suggest there's enough snow for avalanches at alpine and some treeline elevations. Recent snow has likely been redistributed by gusty and variable winds into slabs on lee slopes at alpine and treeline elevations. This snow may overlie a weak old snow surface (surface hoar, facets and/or a crust) which developed during November's dry spell. Check the bond of the snowpack at this level and take a cautious approach as new snow builds deeper above this layer.

Avalanche Problems

Wind Slabs

We're expecting outflow winds over the next few days. This could strip windward slopes and build dense or hard wind slabs in exposed lee terrain, possibly at all elevations.

Avoid travelling in areas that have been reverse loaded by winds.>Be cautious as you transition into wind affected terrain.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3