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Parks Canada chris gooliaff, Parks Canada

Glacier National Park Avalanche Forecast

Apr 30th, 2019 8:00AM

The alpine rating is below threshold, the treeline rating is below threshold, and the below treeline rating is below threshold. Known problems include Loose Wet and Wind Slabs.

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.

Summary

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

An icon showing Loose Wet

Likelihood

Possible

Expected Size

1 - 2

Wet, loose avalanches are more likely in the warmest hours of the day, especially if there has been no refreeze of surface crusts overnight and/or with Spring rainfall.

  • Use extra caution on slopes if the snow is moist or wet.
  • Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

Aspects:

All aspects.

Elevations:

Treeline, Below Treeline.

Wind Slabs

An icon showing Wind Slabs

Likelihood

Possible

Expected Size

1 - 2

Storm slabs and wind slabs in the Alpine / upper Tree-line are possible after cold, snowy storms blow through the region. Readjust your outlook if the weather has remained cold and stormy; it will still feel wintery up high.

Aspects:

All aspects.

Elevations:

Alpine, Treeline.

Valid until: May 1st, 2019 8:00AM