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Avalanche Forecast

Archived

Mar 28th, 2026–Mar 29th, 2026

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

Regions

Glacier.

Wind slab distribution is variable.

Pay attention to changing conditions as you move through different aspects and elevation bands.

Confidence

Moderate

  • We are uncertain due to the variability of wind effect on the snowpack.

Avalanche Summary

No new avalanche observations.

Natural avalanches up to size 2.5 through the highway corridor on Tuesday-Thursday.

A widespread, natural avalanche cycle occurred up to size 4.0 on Mar 19-20 during the atmospheric river. Check out pics from the recent mega avalanche cycle in the MIN Reports. It shows some of the huge debris piles that are making travel challenging.

Snowpack Summary

15-50 cm of recent storm snow has been redistributed by SW winds creating wind slabs in exposed terrain. Expect challenging travel below treeline with frozen tree bombs and huge avalanche debris from last week's super storm.

Below the storm snow, a strong crust exists up into treeline. Another crust from early March is down 70-150 cm.

The Jan 26 surface hoar layer is now buried 150-210 cm deep. This layer is not a concern for human triggering with bridging crusts above.

Weather Summary

Convective flurries.

Tonight Isolated flurries. trace precipitation. Alpine low -11°C. Winds SW 20 gusting 45km/h. Freezing level (FZL) 500m.

Sun Flurries 7cm. High -7°C. Wind SW 15 gusting 40km/h. FZL 800m

Mon Sunny periods with isolated flurries. Trace precipitation. High -12°C. Wind W 15-30km/h. FZL 700m.

Tues Sunny periods with isolated flurries. Trace precipitation. High -7°C. Wind S 10-25. FZL 900m.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • Keep in mind a buried crust offers an excellent bed surface for avalanches.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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.