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Avalanche Forecast

Apr 25th, 2014–Apr 26th, 2014
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
Below Threshold
The avalanche danger rating in the alpine will be below threshold
Treeline
Below Threshold
The avalanche danger rating at treeline will be below threshold
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Sea To Sky.

We are no longer issuing danger ratings for this region due to a lack of field data.Please refer to this blog post for more insight into managing the current conditions.

Weather Forecast

Overnight and Saturday: Expect some periods of clear or broken skies overnight which should result in a good overnight re-freeze as the freezing levels drop to 1000 metres. A mix of broken skies and periods of light to moderate precipitation during the day with freezing levels rising up to 1500 metres. Light Northwest winds overnight becoming strong Southwest winds in the afternoon and evening.Sunday: Moderate to strong Southwest winds combined with light precipitation. Mostly cloudy with freezing levels dropping to 1000 metres overnight and rising up to 1500 metres during the day.Monday: Expect another good re-freeze above 1000 metres. Moderate Westerly winds and light precipitation.

Avalanche Summary

Expect new wind slabs and thin storm slabs to develop above recent melt-freeze crusts. These slabs may be easily triggered due to the hard sliding layer of the melt-freeze crust. Daily melt-freeze cycles may be weakening cornices, and they may fall off naturally or be easily triggered. Rain at lower elevations may cause new snow to weaken rapidly and slide out of steep terrain, sometimes gathering mass in constrained terrain features.

Snowpack Summary

The spring snow-pack is comprised of many layers of melt-freeze crusts, thin new snow layers, and stiff wind slabs in the alpine. The snow-pack may be very different depending on elevation, with moist or wet snow in the valleys and near winter conditions in the alpine. The weather can change rapidly at this time of year, and this may result in different types of avalanche problems. Danger is most likely to increase if there is a substantial new snow storm with wind, or if the temperatures increase rapidly with or without sunshine. Our plan is to place a link in the headline that explains general risk scenarios associated with the forecast weather. We will not issue danger ratings for this region due to the lack of data as a result of professional operators closing for the season.

Avalanche Problems

Wind Slabs

Forecast new snow and wind may result in new wind slabs developing in the alpine and at treeline. Wind slabs may not be well bonded to recent melt-freeze crusts.
Use caution in lee areas in the alpine. Recent wind loading have created wind slabs.>Be cautious as you transition into wind affected terrain.>

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 3

Loose Wet

During day time warming snow may become moist or wet and slide easily at lower elevations and on solar exposed aspects.
Be cautious of sluffing in steep terrain.>Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Cornices

Cornices may become weak from loading from new snow and wind, or from day time warming.
Cornices become weak with daytime heating, so travel early on exposed slopes.>Give cornices a wide berth when travelling on or below ridges.>

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3