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Avalanche Forecast

Archived

Apr 22nd, 2019–Apr 23rd, 2019

Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

Little Yoho.

Avalanche activity has slowed down, but a few skier remote and skier triggered avalanches on Sunday indicate that the new snow is not completely well bonded to the underlying layers. Enter steeper terrain with caution.

Weather Forecast

Freezing levels will remain around treeline on Monday night and into into Tuesday. Tuesday will be a mostly cloudy day with up to 5 cm's of snow expected by the evening. Winds will slowly decrease to the moderate or light range by the end of the day. A few more flurries are expected Wednesday with lowering freezing levels.

Snowpack Summary

Extensive wind effect in the alpine with strong SW winds on Monday. 20-50 cm of snow from last Thursday and Friday is beginning to bond to the underlying surfaces of crusts, facets, surface hoar and storm snow, but weaknesses and whumpfing are still present. Crusts or moist snow at lower elevations and on solar aspects depending on the time of day.

Avalanche Summary

No new avalanches observed on Monday. Continued evidence of the widespread natural and skier triggered avalanche cycle up to size 3 on most aspects above 2000 m from Saturday. A couple new natural and skier triggered avalanches were reported Sunday and there have been many recent cornice failures.

Confidence

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.