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Avalanche Forecast

Archived

Apr 4th, 2019–Apr 5th, 2019

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

Regions

Kootenay Boundary.

Conditions vary rapidly with elevation. Watch out for fresh wind slabs above the rain-snow line.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

THURSDAY NIGHT: Mostly cloudy, light south wind, alpine temperature -1 C, freezing level 1900 m.FRIDAY: Cloudy with snowfall, accumulation 5 cm, moderate to strong southwest wind, alpine temperature -2 C, freezing level 1700 m.SATURDAY: Cloudy with snowfall, accumulation 10 to 20 cm, moderate south wind, alpine temperature -4 C, freezing level 1600 m.SUNDAY: Cloudy with snowfall, accumulation 5 to 10 cm, light to moderate southwest wind, alpine temperature -4 C, freezing level 1600 m.

Avalanche Summary

No new avalanches were observed on Wednesday.

Snowpack Summary

Above around 1800 m, 5 to 15 cm of recent snow overlies a melt-freeze crust on all aspects except for north, where the snow may overly weak faceted snow or surface hoar. The snow has been redistributed by strong southerly wind. Another 5 cm is expected to accumulate during Friday. Below 1800 m, the snowpack is wet. Snow is melting rapidly at lower 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.