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Avalanche Forecast

Archived

Apr 3rd, 2017–Apr 4th, 2017

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

Regions

South Coast.

Observations from the region have been extremely limited recently. If you are out in the mountains, please consider posting your observations to the Mountain Information Network and help us improve the bulletin. Click here for more details.

Confidence

Low - Due to the number of field observations

Weather Forecast

Mostly cloudy conditions are expected on Tuesday with snowfall beginning in the late afternoon or evening. Alpine wind is expected to be light on Tuesday morning and progressively become strong from the southwest by Tuesday evening. Freezing levels are expected to reach around 1500 m on Tuesday afternoon. 15-25 cm of snow is forecast for Tuesday night and another 20-40 cm is forecast for Wednesday. Alpine wind is expected to be strong from the south or southwest and freezing levels are forecast to reach around 1500 m on Wednesday. The storm is forecast to taper off Wednesday night and a mix of sun and cloud is currently expected on Thursday.

Avalanche Summary

No new avalanches have been reported recently but observations have been very limited. On Tuesday, the main concern is wind slabs in high north facing terrain.

Snowpack Summary

Recent snowpack observations have been very limited and confidence is low. A widespread crust is now expected on all aspects and elevations except for north facing terrain in the alpine. Where dry snow still exists, recent strong southerly winds have likely formed wind slabs. At lower elevations, recent rain events have likely saturated the snowpack which is expected to be isothermal below the surface crust.

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.