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Avalanche Forecast

Archived

Jan 1st, 2013–Jan 2nd, 2013

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

Regions

Sea To Sky.

Confidence

Good

Weather Forecast

Wednesday: Dry with sunny spells. An inversion is likely with alpine temperatures a couple of degrees above zero. Ridgetop winds gusting to 40 km/h from the SW. Thursday: Dry, with sunshine in the morning. The inversion will continue into Thursday. Ridgetop winds remaining around 40km/h. Friday: 5-10 cm snow. Freezing level lowering to around 1000m. Winds around 40km/h from the SW.

Avalanche Summary

No recent avalanche activity.

Snowpack Summary

Some relatively thin windslabs exist on lee side of ridge top and on cross loaded features. Even though they are continuing to bond, these windslabs have been triggered by skiers recently and could still be, especially during solar radiation and/or warming forecast for the afternoon. In sheltered areas, it is still possible to find low density snow at the surface in the alpine and below. South facing aspects are expected to become moist at the surface in the afternoon and create a crust when cooled. No significant shears were observed in the top or mid snowpack layers. Near the base of the snowpack, a crust/facet layer is now unlikely to be triggered. However, professionals are still mindful of thin snowpack trigger areas or large loads (like a large cornice) which could wake it up again, leading to a very large avalanche.

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.