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Avalanche Forecast

Archived

Mar 18th, 2025–Mar 19th, 2025

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, 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.

Regions

Glacier.

March showers bring flurries to the High Country.

Convective bursts of snowfall can drop 5-10cm of fluff to localized areas in a hurry. They may also arrive with gusty winds, elevating danger in your specific zone.

Weather and the snowpack change quickly in the Spring, so be fluid with plans and have a back-up destination.

Confidence

Moderate

Snowpack Summary

Convective squalls have incrementally delivered up to 50cm of new snow in the last week. Localized wind redistribution has been isolated to higher alpine features. The March 5th interface, down 50-100cm, consists of a crust &/or surface hoar (3-10mm, largest in the alpine).

Shaded, wind-sheltered areas above 1600m hold loose, dry snow (and great skiing!).

Two persistent weak layers (PWL) of heavily facetted snow from cold temps in Jan/Feb are now buried 120-160cm deep.

Weather Summary

Increasing cloud cover Wed PM and flurries for the next few days.

Tonight Clearing. Alpine low -10°C. Ridge wind SW 25km/hr. Freezing Level (FZL) valley bottom.

Wed Sun to cloud, flurries, trace snow. Alpine high -6°C. Wind SW 20-40km/h. FZL 1400m.

Thurs Cloudy, scattered flurries, 5cm. Alpine high -6°C. Wind SW 20-45km/h. FZL 1500m.

Fri Flurries. 10cm. Alpine high -5°C. Ridge winds 15-50km/h. FZL 1200m.

Terrain and Travel Advice

  • Loose avalanches may step down to deeper layers, resulting in larger avalanches.
  • Even brief periods of direct sun could produce natural avalanches.

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.