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Avalanche Forecast

Archived

Feb 26th, 2025–Feb 27th, 2025

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

Regions

Glacier.

Recent snow has settled into a cohesive slab which is sensitive to human triggering

Time to practice conservative travel techniques!!

Confidence

Moderate

Avalanche Summary

Just outside the park, explosive avalanche control produced avalanches up to size 3.5 avalanche on Wednesday with notably wide propagation.

On Tuesday Connaught Creek was busy, with reports of people remote-triggering avalanches to sz 2 on Video Pk, 8812 Bowl, Dispatcher Bowl, and Balu Pass shoulder.

Low elevation areas (below 1300m) have significant pinwheeling on the surface. Steep solar slopes are releasing moist/loose avalanches to sz 2 with direct sun.

Snowpack Summary

40cm of heavy storm snow sits on a faceted upper snowpack. Strong to extreme SW winds created windslabs at Alpine and Tree-line elevations.

A weak layer of surface hoar, facets and/or suncrust (Jan 30th) is 50-80cm down. This layer is easy to pick out in the snowpack and is reactive to human loads.

Low elevation zones with a thin snowpack should be treated with caution. The cold, weak facets at the base have undergone rapid change and are now nearly isothermal.

Weather Summary

Feels like spring! Scattered sun and cloud with warm temps are forecast as a weak ridge of high pressure sets up over the region.

Tonight Mainly cloudy. Alp low -4°C. Ridge winds Southwest 35km/hr. FZL 1100m

Thurs Cloudy with flurries. Snow: 2-5cms. Alp high -4°C. Ridge wind SW 25 gusting 60km/hr. FZL 1500m

Fri Mix sun/cloud. Alp high -1°C. Light wind. FZL 1700m

Sat Mix of sun/cloud. Alp high 0°C. Light wind. FZL 1700m

Terrain and Travel Advice

  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.

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.