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Archived

Avalanche Forecast

Jan 27th, 2018–Jan 28th, 2018
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: South Coast.

Natural avalanche cycle expected on Sunday. Travel in avalanche terrain not recommended.

Confidence

High -

Weather Forecast

SUNDAY: 40-60 mm of rain (snow above roughly 1500m) / Strong to extreme southwesterly ridgetop winds / Freezing level rapidly rising to around 1800m.MONDAY: 60-80 mm of rain (snow above roughly 1500m) / Strong to extreme southwesterly ridgetop winds / Freezing level around 1800m.TUESDAY: 10-15 cm of new snow / Moderate southwesterly ridgetop winds / Freezing level dropping to around 800m.

Avalanche Summary

No new avalanches have been reported in this region on Friday. However, a natural avalanche cycle is expected to begin Saturday with the incoming storm.

Snowpack Summary

15-25cm of new snow is being redistributed by strong southwesterly ridgetop winds creating fresh storm slabs reactive to human triggers. Below the most recent storm snow there is a crust at treeline and below. The reactivity of the new storm slabs is likely to vary greatly depending on elevation/ temperature and orientation to wind. In general, I would expect the touchiest conditions to exist in exposed, higher elevation terrain.

Avalanche Problems

Storm Slabs

New snow, strong winds, and rising temperatures will create fresh storm slabs reactive human triggers
Be alert to conditions that change with elevation and time of day.The new snow will need time to settle and stabilize.Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 2

Cornices

Large amounts of recent new snow and high winds are creating rapid cornice growth.
Falling cornices may trigger large avalanches on the slopes below.Give cornices a wide berth when travelling on or below ridges.

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

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 1.5 - 2.5