Avalanche Forecast

Issued: Apr 28th, 2014 8:01AM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Loose Wet and Persistent Slabs.

ali haeri, Parks Canada

Glacier.

Summary

Weather Forecast

Today, expect a mix of sun and cloud today with localized convective flurries and freezing levels to hover around 1700m with light winds. The overall weather pattern is for gradual clearing tonight as a high pressure ridge builds, freezing levels gradually rising to 2500m by Thursday.

Snowpack Summary

20cm of new snow over the last 4 days. Dry snow can still be found on due north aspects above 2000m. At tree line, moist snow exists in the top 50cm below a supportive melt freeze crust. Several crusts in the top meter of the snowpack. Glide crack slopes continue to open up and release with spring conditions.

Avalanche Summary

3 natural avalanches yesterday within the highway corridor all size 2.0.

Confidence

on Monday

Problems

Loose Wet

Expect new snow to avalanche easily with any solar radiation that manages to get through the variable cloud cover.

Sluffs may trigger deeper instabilities.Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.

Aspects: North, North East, East, South East.

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

1 - 2

Persistent Slabs

Buried weak layers will continue to plague us until the snow is gone. These layers are most likely to release with strong solar radiation, warm temperatures, large triggers or when triggered from a shallow area.

Be aware of the potential for full depth avalanches due to deeply buried weak layers.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely

Expected Size

3 - 4

Valid until: Apr 29th, 2014 8:00AM