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Avalanche Forecast

Archived

Mar 25th, 2022–Mar 28th, 2022

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

Regions

Waterton Lakes.

Spring has arrived so plan to travel early in the day when travel is fast and hazard is lower with cooler temps.

High freezing levels expected on Sunday and Monday mean we are unlikely to get good over night refreezes.

Weather Forecast

Tonight: Few clouds. Low of -1 Freezing levels 1500m.

Sat: Mix of sun and cloud with alpine temps rising to +1. Winds light from the SW. FL 2400m.

Sun: Mix of sun and cloud. Alpine temps +8. Light to moderate winds from SW. FL 3000m.

Mon: Partially cloudy with alpine temps around +5. Winds light gusting moderate from W. FL 2800m.

Snowpack Summary

Moist surface snow on all aspects to 1800m, higher on solar slopes. Above 1800m a rain crust exists on all aspects well into into ALP. A series of crusts and windslab make up the midpack. Lower snowpack is well settled 1F to P. HS 250-300 cm near the continental divide.

Avalanche Summary

Numerous natural wet loose avalanches to sz 2 were observed around the park and in surrounding tenure in the last few days. Evidence of of large wet loose cycle from Thursdays rain can be seen in many paths. Please report any observations to the Mountain Information Network.

Confidence

Freezing levels are 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.

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.