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Avalanche Forecast

Archived

Nov 24th, 2018–Nov 25th, 2018

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

Regions

Sea To Sky.

The deepest riding is in the alpine. Watch out for lingering wind slabs.

Confidence

Low - Due to the number of field observations

Weather Forecast

SATURDAY NIGHT: Mostly cloudy, trace snowfall.SUNDAY: Mostly cloudy with trace snowfall, moderate southwest winds, alpine temperature -3 C, freezing level 1400 m.MONDAY: Cloudy with snow switching to rain except for high elevations, accumulation 30 mm, strong southwest winds, alpine temperature 0 C, freezing level 2200 m.TUESDAY: Cloudy with heavy rainfall or snowfall at high elevations, accumulation 40 to 60 mm, strong southwest winds, alpine temperature 0 C, freezing level 2100 m.

Avalanche Summary

No avalanches were reported in the region on Saturday. Small natural and skier-triggered storm slab avalanches were observed out of steep, wind-loaded terrain at alpine elevations on Friday.We would very much appreciate it if you spend a moment to submit any observations you have to the Mountain Information Network here, even if it is just a photo. Thanks!

Snowpack Summary

The deepest snow is found at alpine elevations, with amounts around 60-100 cm. Approximately 30 cm of new snow lies above previous wind slabs that formed with strong southerly winds on Wednesday. Below this lies a thin crust, now buried around 50 cm. A thicker lower crust, that may be associated with weak faceted crystals in some places lies close to the ground. This is most likely to cause problems in glaciated terrain or on high slopes where the summer snow did not melt out.

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.