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Avalanche Forecast

Archived

Mar 16th, 2025–Mar 18th, 2025

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

Regions

Waterton Lakes, Waterton.

We have had up to 40 cm of new snow in the last 4 days, great ski conditions right now but treat steep slopes with caution as new storm slabs may be human triggerable.

Confidence

Moderate

Avalanche Summary

No new avalanches observed but limited visibility.

Snowpack Summary

Up to 30 cm of new snow since March 13th, this sit on settled snow above a robust melt freeze crust. This crust exists everywhere except for northerly aspects above 1800 m. The January drought layer lies 60 –130 cm deep, with snow depths at treeline averaging 130–200 cm.

Weather Summary

Snow tapering off on Sunday and a clearing trend to start the week. See the table below for a more detailed forecast.

Check out the Mountain Weather Forecast for the most up to date information.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Avoid thin areas like rocky outcrops where you're most likely to trigger avalanches on deep weak layers.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.