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Archived

Avalanche Forecast

Feb 27th, 2016–Feb 28th, 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
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: South Coast.

Watch the winds! Avalanche danger could be higher at treeline in the parts of the region that see moderate winds. Back off if you notice blowing or drifting snow.

Confidence

High

Weather Forecast

SUNDAY: flurries starting overnight and becoming light snow through the day with accumulations of up to 10cm expected, light to moderate southwesterly winds, 1400m freezing level. MONDAY: another 10cm overnight with flurries through the day, light southerly winds, 1200m freezing level. TUESDAY: snow starting overnight with up to 10cm possible by the end of the day, light to moderate southerly winds, 1200m freezing level.

Avalanche Summary

No new avalanches were reported on Friday.  Earlier in the week a few size 1-2 wind slabs were triggered naturally and by skiers, however this activity seems to have slowed. Cornices are still large and fragile, and may fail under the weight of a person.

Snowpack Summary

Cornices are large and weak.  A refreeze crust may cap moist snow at and below treeline and on solar slopes in the alpine. Older wind slabs are gaining strength, but may still be reactive to human triggers, especially in steep lee features in the alpine, where they could also be triggered naturally by cornice fall. Several crusts can be found in the upper meter of the snowpack depending on aspect and elevation. A layer of surface hoar buried in early January can be found down 1-2 m. In most places it is thought to be capped by a thick, widespread crust.

Avalanche Problems

Cornices

Cornices are reported to be large and weak. The weight of a person may be enough to cause a cornice failure. A collapsing cornice could also trigger a slab on the slope below.
Give cornices a wide berth when travelling on ridges.>Avoid steep slopes below cornices.>

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 4

Wind Slabs

Hard wind slabs may be difficult to spot once buried below new snow.
Travel on ridges or ribs to avoid wind loaded features.>

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3