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Archived

Avalanche Forecast

Apr 19th, 2022–Apr 20th, 2022
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Yukon.

More benign weather from an avalanche perspective for the next few days.

Be sure to check out the latest Forecasters' Blog as you plan your spring objectives.

Confidence

High -

Weather Forecast

TUESDAY NIGHT: Cloudy with isolated flurries and a trace of new snow. Light east winds.

WEDNESDAY: Mainly cloudy. Light variable winds. Treeline high temperatures around -4.

THURSDAY: A mix of sun and cloud. Light variable winds shifting south. Treeline high temperatures around -3. 

FRIDAY: Mainly cloudy with isolated flurries and a trace of new snow. Strong south winds. Treeline high temperatures around -3.

Avalanche Summary

No new avalanches have been reported over the past few days on the Canadian side of White Pass. Things have been different on the US side with at least one very large natural avalanche as well as some ice falls leaving ice chunks and 4-5m debris piles on the rail line in the afternoon on Saturday and Sunday. 

 

A size 3 cornice-triggered slab avalanche was observed near White Pass last Tuesday. This avalanche occurred on an east aspect in the alpine.

Several small human-triggered wind slabs (size 1) were reported during the outflow wind event early last week.

Snowpack Summary

A few windblown cm of new snow have added to heavily wind affected surfaces from last week's strong northerly winds.

On south and west facing slopes up to 1400 m a surface crust from spring sunshine can be found, while other aspects hold dry snow. The mid-snowpack is generally strong, overlying weak basal facets at the base of the snowpack. 

Check out this MIN report for an overview of current conditions in the Fraser area. 

Terrain and Travel

  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Avalanche Problems

Cornices

Cornices may be weak and reactive to human triggers. They are a significant hazard alone, and may produce large slab avalanches as they fall onto the slope below. Cornice falls are more likely as temperatures warm each day, or when strong sunshine is present. 

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1.5 - 3