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Avalanche Forecast

Archived

Mar 27th, 2026–Mar 28th, 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.

Forecast gusty winds will be re-building the windslab problem tomorrow.

Keep an open mind for changing conditions as you travel.

Confidence

Moderate

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

Avalanche Summary

The new snow and wind caused a small natural avalanche cycle up to size 2.5 through the highway corridor on Tuesday. A field team was also able to easily trigger several size 1 slabs from steep terrain at treeline.

A widespread, natural avalanche cycle occurred up to size 4.0 on Thursday and Friday of last week during the atmospheric river. Explosive avalanche control also produced results up to size 4.

Check out pics from the recent avalanche cycle in the MIN Reports.

Snowpack Summary

15-50 cm of recent storm snow has been redistributed by strong 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

A weak trough this weekend brings convective flurries and seasonal temps.

Tonight Trace of snow. Alpine low -6°C. Winds SW 20-50km/h. Freezing level (FZL) 800m.

Sat Flurries 5cm. High -3°C. Wind SW 20 gusting 70km/h. FZL 1700m

Sun Flurries 5cm. High -6°C. Wind SW 20 gusting 70km/h. FZL 1200m

Mon Flurries 4cm. High -11°C. Wind W 15-40km/h. FZL 700m.

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.