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Archived

Avalanche Forecast

Jan 13th, 2014–Jan 14th, 2014
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
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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: Northwest Inland.

Confidence

Fair - Forecast snowfall amounts are uncertain

Weather Forecast

Synopsis: A ridge of high pressure will build to the south deflecting a series of storms at the North Coast.  A moist, sub-tropical moisture stream looks to feed these systems with moisture spilling over the coast ranges into the inland regions.Tonight and Tuesday: Moderate snow becoming rain/ Strong to extreme southwest winds / Freezing levels 2000m in the Bulkley, 1500m north of the SkennaWednesday: Cloudy / Light northwest winds / Freezing level 800mThursday: Cloudy / Light northwest winds / Freezing level 1800m

Avalanche Summary

Reports of natural storm snow avalanches releasing in wind loaded features from the west of the region.

Snowpack Summary

A recent profile from 1400m elevation on a Northwest aspect in the Hankin area shows the height of snow to be about 155 cm.Up to 50 to 65cm cm of low density snow now overlies heavily wind-affected surfaces at upper elevations and well developed surface hoar or crust at mid-treeline and below. These layers will be something to watch as the overlying snow settles into a more cohesive slab.The mid and lower snowpack are found to be generally gaining strength with depth until the bottom 20-40cm where weak faceted crystals exist down to the ground.

Avalanche Problems

Storm Slabs

As temperatures rise and the precipitation intensifies watch for increased reactivity in wind-exposed terrain especially at and bellow treeline where the storm snow is sitting on a widespread layer of surface hoar.
Avoid open slopes and convex rolls at and below treeline where buried surface hoar may be preserved.>Avoid alpine terrain.>Avoid freshly wind loaded features.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely - Very Likely

Expected Size: 1 - 4

Persistent Slabs

The forecast snows will be a good test for weak layers near the bottom of the snow pack. Triggering a persistent weakness could have nasty consequences. Avoid thin spots, cross-loaded slopes or unsupported terrain.
Be aware of the potential for full depth avalanches due to deeply buried weak layers.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 5