Avalanche Forecast

Issued: Dec 6th, 2015 7:56AM

The alpine rating is high, the treeline rating is high, and the below treeline rating is moderate. Known problems include Storm Slabs.

bcorrigan, Avalanche Canada

Sea To Sky.

Conservative travel is advised. Danger ratings may go higher than forecast. If you are riding in the back country, consider sharing your observations with the MIN

Summary

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

A strong westerly flow will continue to bring Pacific moisture and storm pulses into the area through next week. Each successive system will bring warmer air, pushing freezing levels up to to 1700m on Sunday afternoon, dropping briefly Tuesday morning, then rise again to 2300m by Tuesday afternoon. The Tuesday storm is forecast to bring 50mm of precipitation, tapering off in the late afternoon before the next weaker pulse on Wednesday.

Avalanche Summary

Limited observations due to the current storm cycle. A few reports of soft slabs, storm snow running on previous storm surface up to size 1.5, North aspect around treeline.

Snowpack Summary

Deep storm slabs are developing in the alpine and at treeline above a variety of old surfaces that includes wind crusts, melt-freeze crusts, and weak facetted crystals in some areas. Shallow facetted areas at treeline may now be buried by over a metre of wind transported new snow. Moist or wet snow at lower elevations is most likely settling into into a solid base layer.

Problems

Storm Slabs

The storm slab will be reactive at treeline and above, as we continue to receive large amounts of new snow.

Be alert to conditions that change with elevation.>Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.>

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

2 - 5

Valid until: Dec 7th, 2015 2:00PM