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Avalanche Forecast

Archived

Apr 23rd, 2025–Apr 24th, 2025

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

Regions

Little Yoho.

It's a great time to get out! Easy travel on firm surfaces (crampons helpful!) with 5-15 cm on high due north aspects. Travel in the early morning hours and watch for sun-triggered wet loose avalanches. Spring Conditions - The hazard is expected to be Low in the cold mornings and rise in accordance with the degree of warming.

Enjoy!

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported in Yoho on Wednesday.

Snowpack Summary

Hard surface crusts exist on steep solar aspects and at treeline and below.

On north-facing alpine slopes, there is 10-20 cm of dry snow over firmer surfaces. Off due north, some alpine slopes may have a new surface thin crust capping the 10 cm of snow from a few days ago.

A settled mid-pack sits over the Jan facets down 90 to 150cm, with a well-settled lower snowpack below.

Weather Summary

Progressively warmer over Thursday through Saturday with clear skies and light SW wind. Despite the warming trend for temperatures at 3000 m over the next few days, the freezing levels drop to the valley bottom for Wednesday and Thursday night. Daytime freezing levels rise to 2500 m on Thursday, 2800 m on Friday, and about 3000 m on Saturday.

See the attached weather table for more on temperatures and wind.

Terrain and Travel Advice

  • Even brief periods of direct sun could produce natural avalanches.

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.

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.