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Avalanche Forecast

Archived

Apr 30th, 2019–May 1st, 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

Glacier.

This is the last daily avalanche bulletin of the winter. For information on current Rogers Pass conditions, call (250) 814-5206 to talk with a Visitor Safety Specialist. Also check Avalanche Canada and Mountain Conditions for relevant reports.

Weather Forecast

An excellent regional synopsis can be found at the Avalanche Canada Mountain Weather Forecast. SPOTWX is a resource for weather forecasts at a local scale.

Snowpack Summary

The Spring snowpack relies on cold nights to create a solid crust. Below the crust, a moist, isothermal snowpack shrinks and melts. Danger levels increase with daytime warming, while danger decreases with cold, clear nights. Please see the Avalanche Canada site regarding Spring Conditions for more information on daily danger level fluctuations.

Avalanche Summary

Avalanche activity is most likely to occur in the warmest hours of the day, especially if there has NOT been a cold, clear night to refreeze the surface crusts. Be wary of storm slab avalanches after cold, snowy storms blow through. And, watch those cornices up high. Eventually they will peel off the ridges and tumble down like a massive boulder!

Confidence

Problems

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.

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.