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Avalanche Forecast

Archived

Mar 28th, 2019–Mar 31st, 2019

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

Regions

Waterton Lakes.

The biggest influence on the snowpack right now is the sun. Keep an eye on the weather and avoid south facing slopes when the sun is out.

Weather Forecast

Sunshine and mild temperatures on Friday and Saturday, with freezing levels up to 2000m on Friday and 2400m on Saturday. Sunday will be cloudy with lower temperatures and a freezing level of 1600m.

Snowpack Summary

5-10 cm of recent snow (10-20cm in the front ranges) is sitting on a thick supportive crust in most locations, and appears to be bonding well. Steep north facing alpine terrain is still holding dry snow. The midpack is well settled, and basal weaknesses persist at treeline and in the alpine.

Avalanche Summary

No recent avalanche activity observed.

Confidence

Timing or intensity of solar radiation is uncertain

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.

Deep Persistent Slabs

Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.