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Avalanche Forecast

Archived

Apr 15th, 2022–Apr 16th, 2022

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.

Regions

Yukon.

Watch for pockets of lingering wind slab in steep exposed terrain features and keep your distance from weak overhanging cornices. 

Check out the newest forecaster blog if you are thinking of checking off some big spring objectives.

Confidence

Moderate - Uncertainty is due to the fact that cornice falls are particularly difficult to forecast. Confidence is due to a stable weather pattern with little change expected.

Weather Forecast

FRIDAY NIGHT: Cloudy with flurries bringing trace amounts overnight. Light and variable winds. Freezing levels remain below valley bottom.

SATURDAY: Cloudy with light flurries bringing up to 3 cm over the day. Light and variable winds. Freezing levels remain below valley bottom.

SUNDAY: Cloudy with light flurries bringing up to 5 cm. Light northeasterly winds. Freezing levels remain below valley bottom.

MONDAY: Mostly cloudy with moderate to strong easterly winds. Flurries bring trace amounts of snow. Freezing levels remain below valley bottom.

Avalanche Summary

No new avalanches were reported on Thursday. 

A size 3 cornice-triggered slab avalanche was observed near White Pass on 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 on Monday and Tuesday. 

Avalanche activity is unlikely given the current cool weather trend. However, always consider the possibility of pockets of wind slabs in steep alpine terrain, cornice failures, and wet loose avalanches if the sun is out.

Snowpack Summary

Strong northerly winds have created hard wind affected surfaces throughout the region.  

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

  • Make observations and assess conditions continually as you travel.
  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Problems

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.