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Avalanche Forecast

Archived

Mar 27th, 2020–Mar 28th, 2020

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

Regions

Cariboos.

New snow and strong winds will form fresh storm slabs reactive to human triggers on Saturday.

Confidence

Low - Uncertainty is due to the limited number of field observations.

Weather Forecast

FRIDAY NIGHT: Snow; 5-10 cm, strong west winds, alpine low -3 C, freezing level 700 m.

SATURDAY: Snow; 10-15 cm, strong southwest winds, alpine high 1 C, freezing level 1500 m.

SUNDAY: Snow; 5-10 cm, moderate southwest winds, alpine high 1 C, freezing level 1400 m.

MONDAY: Snow; 5-10 cm, moderate southwest winds, alpine high -1 C, freezing level dropping to valley bottom.

Avalanche Summary

There are currently no professional operations reporting in this region and the data stream is very limited.

Avalanche activity is expected to increase throughout the weekend as new snow amounts increase.

Snowpack Summary

NOTE: We are no longer receiving any professional snowpack observations in this region. The snowpack summary below is based on our most recent observations and weather data.

Recent snow sits on a variety of snow surfaces, consisting of sun crusts, hard wind-affected snow, and soft faceted snow. There are limited observations in the region, but neighboring regions have reported surface hoar forming on sheltered, shady slopes. It will be important to track the depth, cohesiveness, and bond of the new snow to these various old snow surfaces across aspects and elevations where you are travelling.

Cornices are large and looming. A weak layer of surface hoar buried at the end of February may be found 50-100 cm deep, except in the northern tip of the region. Avalanche activity on this layer was last reported March 6th. 

Terrain and Travel

  • Watch for fresh storm slabs building throughout the day.
  • Be alert to conditions that change with aspect and elevation.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Be aware of the potential for large avalanches due to the presence of buried surface hoar.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.