January 31, 2004 This Special Avalanche Warning Sponsored by The Provincial Emergency Program. South Coast Region Weather: A band of precipitation will cross Vancouver Island and dissipate on the South Coast. 10 cm of snow are possible in some areas overnight on Saturday. Temperatures will be at, or slightly below seasonal norms. Winds will remain moderate from the west and then shift gradually to the south, becoming lighter by Monday. Snowpack: A variety of windslab layers are reported. Observers indicate that the upper layers are showing signs of strengthening, but windslabs are still being released in controlled skier tests. A buried layer of facets sit on a crust 50-100cm below the surface at treeline, and is suspected as the failure layer in natural avalanches seen on Friday. The snowpack below is well consolidated. Avalanche Activity: Many natural and human triggered avalanches were observed on Friday. Avalanches were associated with windslabs on alpine N and E slopes, some were large releases affecting large areas of snow and running long distances. Avalanches were observed to initiate on windslabs or surface layers and then step down to the facet-crust interface below. Sledders are cautioned that larger triggers such as a snowmobile could release a large avalanche stepping down to the facet-crust interface. Forecast of Avalanche Danger Up To Monday Evening (February 2, 2004) Alpine - CONSIDERABLE Treeline - CONSIDERABLE Below Treeline - MODERATE Travel Advisory: The snowpack is forecast to slowly gain strength as the weekend progresses, but this may be a mixed blessing. The snowpack is still variable and trigger points for avalanches will exist on some slopes and not on others. As the snow settles from the storm, adjacent slopes may stabilise at different rates; there is no method or trick that you can use to know which of these slopes is safe and which isn^Òt. A good way to reduce your risk of triggering an avalanche is to keep to terrain that has a slope angle of less than 30 degrees.