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Archived

Avalanche Forecast

Feb 5th, 2014–Feb 6th, 2014
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
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

Regions: Cariboos.

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Confidence

Fair - Wind effect is extremely variable

Weather Forecast

Synopsis: An off shore Rex Block keeps the province under cold, dry northerly flow for the forecast period. But the models are starting to agree on a solution that shows the blocking pattern breaking down giving way to a steady flow of Pacific Storms early next week. Time will tell if this is all conjecture and hope, or something a bit more substantive.Thursday: Sky: Clear; Freezing Level: Valley Bottom; Precip: Nil Wind: Light, N | Mod E at ridgetop Friday: Sky: Clear; Freezing Level: Valley Bottom; Precip: Nil Wind: Light, NESaturday: Sky: Clear; Freezing Level: Valley Bottom; Precip: Nil Wind: Light, E

Avalanche Summary

No new avalanches were observed Tuesday.

Snowpack Summary

A small front came through the region on January 29th leaving up to 10 cm of snow in it's wake. In wind exposed terrain the new snow has been formed into small wind slabs by N/NW winds. The settled storm snow and fresh wind slabs rest on a weak layer that consists of large surface hoar (widespread in most sheltered and shaded areas at all elevations), a sun crust on south facing slopes, faceted grains (in colder areas or areas with a thinner snowpack), or a combination of the above. This variable weak layer is expected to become a significant problem if/when it finally starts snowing again. The rest of the upper and mid-snowpack are generally well consolidated. A facet/crust weakness near the bottom of the snowpack has gone dormant for now but may rear it's ugly head again in the future. The depth of this layer makes triggering an avalanche unlikely but the consequences would be very serious.

Avalanche Problems

Wind Slabs

Continued variable winds are forming thin slabs at and above treeline that rest on a variety of persistent weaknesses. This combination should keep both the active sluffing and small wind slab problem in play for another 48 hours.
Highmark or enter your line well below ridge crests to avoid wind loaded pillows.>Carefully consider the impact a thin wind slab will have on your proposed line, especially in high consequence terrain. Have a backup line in mind in case you need to seek more sheltered riding. >On steep slopes, pull over periodically or cut into a new line to manage sluffing.>Watch for terrain traps where small amounts of snow will acumulate into deep deposits.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3