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Avalanche Forecast

Archived

Apr 8th, 2026–Apr 11th, 2026

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

Regions

Waterton Lakes, Waterton.

Friday night we are forecasted to have temperatures well above freezing, this could wake up the persistent slab problems and increase the likelihood of wet loose avalanches on Saturday.

Confidence

Moderate

  • We are uncertain about alpine conditions due to limited field observations.

Avalanche Summary

Numerous wet loose avalanches up to size 2 and one persistent slab avalanche (size 2.5) were observed over the past 5 days.

Snowpack Summary

Surface snow is currently in a melt‑freeze cycle, becoming moist during the day and refreezing overnight, and rests on a thick crust. On north‑facing alpine slopes, facets persist on this crust with a slab above. The mid‑ and lower snowpack are well settled with no notable weak layers.

Weather Summary

Thursday

Sunny. Alpine Low of -6 °C, High of 3 °C. SW wind to 20 km/h. Freezing level of 2400 m.

Friday

Sunny with cloudy periods. Alpine Low of -3 °C, High of 9 °C. SW wind light to 15 km/h. Freezing level of 3200 m.

Saturday

A mix of sun and cloud. Alpine Low of 5 °C, High of 11 °C. SW wind gusting to 30 km/h. Freezing level of 3200 m.

Current weather forecast: Mountain Weather Forecast

Terrain and Travel Advice

  • Rocks will heat up with daytime warming and may become trigger points for loose wet avalanches.
  • Be aware of the potential for large avalanches due to buried weak layers.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

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.