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Avalanche Forecast

Archived

Mar 6th, 2026–Mar 7th, 2026

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 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.

Regions

Flathead, Lizard, Moyie.

A persistent weak layer remains the primary concern for the region.

Don't let your guard down, actively look for signs of instability, and choose conservative terrain.

Confidence

Moderate

  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.
  • We are uncertain about how the timing or intensity of warming will affect the snowpack.

Avalanche Summary

No new avalanches were reported on Thursday, while reports of avalanche activity has tapered the snowpack structure remains a concern.

With incoming warm temperatures, mixed precipitation and strong winds human triggering remains possible.

Snowpack Summary

Fluctuating freezing levels will bring mixed precipitation with 5 to 10 cm of snow above 2000 m by end of day Saturday.

Multiple weak layers of surface hoar and/or crust–facet combinations may be present within the upper meter of the snowpack. The most reactive layer, formed in late January, is buried 40–90 cm deep. Recent avalanches have primarily failed on this surface hoar layer, particularly in steep, sheltered terrain at treeline and below.

While this layer has shown reduced reactivity near the ski hill and in the Lizard Range, riders are still sporadically triggering it across the forecast area.

Weather Summary

Friday Night
Cloudy. 1 to 3 cm of snow. 60 km/h west ridgetop wind. Treeline temperature -3 °C. Freezing level 1600 m.

Saturday
Cloudy. 2 to 4 mm of rain at treeline. 60 km/h west ridgetop wind. Treeline temperature -1 °C. Freezing level 1800 m.

Sunday
Mostly cloudy. 5 to 20 mm of rain at treeline. 70 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.

Monday
Mix of sun and clouds. 3 to 5 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Surface hoar distribution is highly variable. Avoid generalizing your observations.
  • Avoid shallow snowpack areas, rocky outcrops, and steep terrain where triggering is most likely.
  • Avoid freshly wind-loaded terrain features.
  • Be alert to conditions that change with elevation, aspect, and exposure to wind.

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.

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.