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Archived

Avalanche Forecast

Feb 24th, 2016–Feb 25th, 2016
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
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: South Coast.

Avoid travelling on or under any slopes getting the heat of the sun.

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

Thursday is expected to be cloudy and dry, with light southerly winds and the freezing level rising to around 2500 m in the afternoon. On Friday, light snow begins in the afternoon and continues through Saturday (5-15 cm total). The freezing level is expected to fall towards 1600 m with this snow. Winds are light to moderate from the S-SW.

Avalanche Summary

A few small wind slabs were triggered by skiers on Tuesday. Loose wet avalanches were also reported on steep solar aspects. Cornices are large and fragile, and may fail under the weight of a person.

Snowpack Summary

Cornices are large and weak. Recently formed storm slabs and wind slabs are generally settling, but may still be reactive to human triggers in specific terrain, and may be triggered by cornice fall. Slopes that receive direct sun are likely to have a sun crust in the mornings and become moist and weak by day. Several crusts can be found in the upper metre of the snowpack. A layer of surface hoar buried in early January is down 1-2 m. In most places it is thought to be capped by a thick strong crust. It is becoming increasingly hard to make this layer fail in snowpack tests and triggering an avalanche on it is unlikely.

Avalanche Problems

Cornices

Large cornices are looming. These could fail under the weight of a person, or on their own. A cornice fall can also trigger a large avalanche on the slope below.
Avoid steep slopes below cornices.>Give cornices a wide berth when travelling on ridges.>

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 2 - 4

Wind Slabs

  Wind slabs exist on many slopes. It may still be possible to trigger these with the weight of a person or snowmobile.
Travel on ridges or ribs to avoid wind loaded features.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Loose Wet

The snowpack on slopes receiving direct sun may weaken and start to spill loose wet avalanches.
Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.>

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

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 3