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Avalanche Forecast

Archived

Mar 22nd, 2026–Mar 23rd, 2026

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

Regions

Glacier.

Conditions change drastically with elevation. Expect wind slab development in the alpine and challenging travel down low.

Confidence

Moderate

  • We are uncertain about how quickly persistent slabs are gaining strength.

Avalanche Summary

Avalanche activity has slowed down with no notable new observations on the weekend.

A widespread, natural avalanche cycle occurred up to size 3.5 in Rogers Pass Thursday and Friday. Explosive avalanche testing also produced results up to size 4 on Friday afternoon.

Many storm slab avalanches stepped down to persistent weak layers resulting in large avalanches, running full path.

Check out some of the excellent MIN Reports with pics from the recent avalanche cycle.

Snowpack Summary

In the alpine, up to 140cm of recent snow has been redistributed by strong winds. At tree line and below, a thick crust has formed on the surface.

Below the recent storm snow, a crust from early March is buried 60-140 cm deep.

The Feb 9 and Jan 26 surface hoar layers are now buried 150-210 cm deep. These problems have become less active with the colder temperatures but the persistent weak layer will need time to adjust to the recent snow load.

Weather Summary

Storm arriving Tuesday.

Tonight Mainly cloudy, no precipitation. Alpine high -9°C. Winds SW 20 to 40km/h. Freezing level (FZL) 600m.

Mon Mainly cloudy. No precipitation. Alpine high -4°C. Wind SW 20 gusting 55km/h. FZL 1600m.

Tues Snow, 17cm. Alpine high -3°C. Wind S 15 gusting to 85km/h. FZL 1600m.

Wed Flurries , 6cm. Alpine high -5°C. Wind SW 20-gusting to 90km/h. FZL 1300m.

Terrain and Travel Advice

  • Be alert to conditions that change with elevation, aspect, and exposure to wind.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Expect slab conditions to change drastically as you move into wind-exposed terrain.

Problems

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.

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.