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Avalanche Forecast

Archived

Feb 28th, 2025–Mar 1st, 2025

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural and human triggered avalanches likely.
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.

High freezing levels and intense solar will destabilize the snowpack. This is the first time this winter freezing level will get up to ridgetop elevations.

Natural avalanche activity at all elevations is likely.

Confidence

Moderate

Avalanche Summary

Natural activity has tapered off in the park but operations adjacent to the park are still reporting large natural avalanche happening.

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.

Snowpack Summary

40cm of heavy storm snow sits on a faceted upper snowpack. Widespead wind effect exists in the alpine from previous SW winds.

A weak layer of surface hoar, facets and/or suncrust (Jan 30th) is 50-80cm down. Feb 16 is another PWL(facets/crust/surface hoar) down 30-40cms. Both these layers are reactive to human triggering.

At lower elevations the the snowpack is quite spring-like; thin, moist and facetted with a weak surface crust in the mornings.

Weather Summary

A ridge of high pressure is set up over Southeast BC, giving mostly sunny skies and high freezing levels

Tonight Mix cloud & clear. Nil precip. Alp low -3°C. Light ridge winds. Freezing level(FZL) 1300m

Sat Mix of sun/cloud. Alp high +3°C. Light wind. FZL 2000m with a temperature inversion.

Sun Cloudy. Alp high 1°C. Ridge wind light. FZL 1900m.

Mon Mix sun/cloud with flurries. Alp high -4°C. Light wind. FZL 1600m

Terrain and Travel Advice

  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.
  • Keep in mind that human triggering may persist as natural avalanches taper off.

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.