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Avalanche Forecast

Archived

Mar 1st, 2025–Mar 2nd, 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 unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Glacier.

Warm temps and strong solar will make the avalanche problems more reactive.

Avoid South and West facing slopes if the heat from the sun feels strong.

Confidence

Moderate

Avalanche Summary

Natural activity peaked yesterday with many large slab and wet loose avalanches running far. Mountain top freezing levels and strong solar was the trigger.

Snowpack Summary

40cm of heavy storm snow sits on a faceted upper snowpack. Widespread wind effect exists in the alpine from previous SW winds. Yesterday's warming/cooling event has created a widespread surface crust

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.

Weather Summary

Building cloudy weather as the ridge of high pressure breaks down.

Tonight Mix cloud & clear. Nil precip. Alp low 0°C. Light ridge winds. Freezing level(FZL) 900m

Sun Cloudy. Alp high 0°C. Ridge wind light. FZL 1800m.

Mon Mix sun/cloud with flurries. 6cm snow. Alp high -3°C. Light wind. FZL 1600m

Tues Mix of sun/cloud. Alp high -6. Light wind. FZL 1500m

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.