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Avalanche Forecast

Archived

Apr 3rd, 2022–Apr 4th, 2022

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 possible, human triggered probable.
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.

Regions

Lizard-Flathead.

Keep an eye on snow accumulation and be prepared to dial back your terrain selection throughout the day. New storm slabs will increase in size and sensitivity to triggering.

Confidence

Low - Uncertainty is due to the track & intensity of the incoming weather system.

Weather Forecast

Sunday night: Stormy with up to 5 cm of new snow expected. Moderate to strong southwest winds. Freezing level falling to 1200 m.

MONDAY: stormy with 10 to 25 cm of snow expected. strong southwest wind and freezing level around 1600 m.

TUESDAY: Mostly cloudy with around 5 cm of new snow expected. Moderate west wind and freezing level around 1600 m.

Wednesday: Sunny with no new snow expected. Light to moderate westerly winds and freezing levels rising to 1800 m.

Avalanche Summary

On Saturday ski cutting produced several small slab avalanches and wet loose avalanches. 

We suspect that rider triggerable storm slabs will form throughout the day on Monday.

Snowpack Summary

New storm and wind slabs will likely form throughout the day on Monday. A crust exists on all aspects to around 2500 m and likely to mountain top on sun affected slopes. This crust will likely become moist at lower elevations as the freezing level rises. 

 The mid and lower snowpack are generally strong and well bonded.

Terrain and Travel

  • Watch for fresh storm slabs building throughout the day.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.