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Avalanche Forecast

Archived

Mar 31st, 2025–Apr 1st, 2025

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

Regions

Glacier.

Pay close attention to temperatures and be mindful of the solar warming.

Be prepared to back off if the snow surface become moist or if the near surface crust becomes unsupportive.

Confidence

Moderate

Avalanche Summary

Small, loose wet cycle from steep sunny slopes today.

So far the March 25th crust has added strength to the snowpack but expect natural activity to pick back up during sunny periods or if freezing levels are higher then forecast.

A rain event into the alpine caused a widespread natural avalanche cycle on Wednesday. Numerous very large wet avalanches ran down into the valley bottom. These avalanches included the deeply buried January Facets.

Snowpack Summary

10-30cm of surface snow is dry powder on northerly aspects in the alpine but becomes heavy on sun effected slopes and moist below 2000m.

Surface snow sits on a 10-25cm thick crust of variable strength formed by the rain event March 25th. Field teams reported moderate compression test results within this crust.

Moist snow can be found below this crust at tree line and below. If the persistent slab from March 25 is triggered , it may entrain large wet loose avalanches.

Weather Summary

Unsettled conditions continue Tues-Wed

Tonight Mainly cloudy. West wind 10km/hr. Freezing Level (FZL) 1400m

Tues Cloudy with sunny periods & isolated flurries. Trace precipitation. Alpine high -4 °C. Wind W 20-30 km/h. FZL1800m

Wed Partial cloud with isolated flurries. Trace precip. Alpine high -6. Wind West 15-25. FZL1400m

Thurs Cloudy with scattered flurries. 4 cm snow. Alpine high -9 °C. Wind N 15. FZL 1300m

Terrain and Travel Advice

  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

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.