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Archived

Avalanche Forecast

Jan 3rd, 2013–Jan 4th, 2013
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
1: Low
The avalanche danger rating in the alpine will be low
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: Cariboos.

Confidence

Good

Weather Forecast

Friday: Mostly cloudy, with a chance of flurries. Temperatures should reach -8 with westerly winds 30-50km/h.Saturday: A mix of sun and cloud, with clouds building thought the day. Flurries may develop late in the day or overnight. Winds turn more southerly and remain moderate with temperatures reaching -5.Sunday: Mostly cloudy with light flurries (up to 10cm), moderate southwesterlies and temperatures reaching -10.

Avalanche Summary

Loose snow avalanches (sluffing) continue to be reported from steep terrain.

Snowpack Summary

Slow and subtle change is the name of the game under the current conditions. Surface hoar growth continues with bigger crystals observed below 1800m (up to 10mm). In protected areas, the surface hoar continues into treeline and the low alpine but crystal size is significantly smaller and distribution is very patchy. Near surface faceting has penetrated the upper snowpack as deep as 30cm, keeping the surface snow soft. The sun from the past few days has left behind a thin, breakable crust on south and west aspects. In some isolated areas this crust is more widespread to other aspects due to the inversion conditions. These crusts will likely facet out in the next few nights.Variable winds have built windslabs in many exposed locations at treeline and in the alpine The faceting process has softened many of the older windslabs, but fresh deposits may be reactive to rider traffic.The midpack is well settled. The crust/facet combo found deep in the snowpack is still present, but has become dormant.

Avalanche Problems

Wind Slabs

Changing wind directions have built windslabs in unusual locations.
Use ridges or ribs to avoid pockets of wind loaded snow in exposed locations.>Be aware as you transition into wind affected terrain.>

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 4