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Avalanche Forecast

Archived

Dec 24th, 2018–Dec 25th, 2018

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

Regions

South Coast.

A more stable weather pattern is forecast through the Christmas Holiday period.

Confidence

High -

Weather Forecast

MONDAY NIGHT: Mostly cloudy with some clear breaks, light south wind, treeline temperature -2 C,  freezing level 600 m.TUESDAY: Mostly cloudy with sunny breaks, light southeast wind, treeline temperature -1 C, freezing level 700 m.WEDNESDAY: Cloudy with flurries, accumulation 5-10 cm, light to moderate southwest winds, treeline temperature -2 C, freezing level 500 m.THURSDAY: Mix of sun and cloud, light west winds, treeline temperature -2 C, freezing level 600 m.

Avalanche Summary

Reports indicate that storm snow was reactive to skier traffic on Saturday and Sunday during the last storm. Skiers were able to initiate loose dry and storm slab avalanches. Small loose dry avalanches were also capable of triggering storm slab avalanches, which ran far. The likelihood of triggering this storm snow should decrease as the week progresses and a clearing trend prevails.

Snowpack Summary

Upwards of 60 cm of snow accumulated on Sunday. This snow fell on a melt-freeze crust that was formed during Thursday's storm. Reports indicate that the snow is bonding well to the crust in certain areas but that the storm snow can slide on the crust in other areas. Expect the deepest deposits in lee terrain features around treeline and alpine elevations.

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.