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Avalanche Forecast

Archived

Jan 19th, 2012–Jan 20th, 2012

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Cariboos.

Confidence

Fair - Forecast snowfall amounts are uncertain on Saturday

Weather Forecast

Cold arctic air should be replaced by warmer air and precipitation that is moving into the area from the Pacific coastal areas. Alpine temperatures are expected to rise to about -14.0 in the alpine on Friday. Precipitation should start by early afternoon and accumulate up to about 15 cm by Saturday morning. Winds will also increase overnight Friday to moderate westerly by Saturday morning. The freezing level is forecast to remain near valley bottoms during the forecast period. Snow should continue during the day on Saturday bringing another 10-20 cm by Sunday. The western upslope areas of the Monashees and the Cariboos may get close to double these amounts.

Avalanche Summary

No significant avalanche activity has been reported from the region recently.

Snowpack Summary

Some surface facetting during the recent cold spell. Strong temperature gradient in the top 30 cm. Stiff windslabs have developed in the alpine and at treeline. Some areas reporting a crust that is now buried by about 30 cm of cold dry light snow. Strong well settled mid-pack.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.