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Avalanche Forecast

Archived

Mar 28th, 2022–Mar 29th, 2022

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

Regions

Jasper.

The snowpack is in a complicated transition at this moment. In many places at TL and below a saturated snowpack is now insulated under a warm blanket of new snow. Coming cold overnight temps will improve travel and reduce the present hazard.

Weather Forecast

Overnight: Cloudy with clear periods. Alpine temperature: Low -8 °C. Winds light, 15 km/h. FZL valley Bottom

Tuesday: A mix of sun and cloud. Alpine temperature: High -1 °C. Wind light ,15 km/h. FZL: 2200 m

Wednesday: Cloudy with sunny periods and isolated flurries. Trace. Low -9 °C, High -4 °C. Mostly light winds. FZL: 1700m

Snowpack Summary

Up to 25cm of new snow above 2000 m with minimal wind effect overlies sun crust at all elevations and a melt-freeze crust up to 2100m on all aspects. Snow pack below 1700m is mostly isothermal and unsupportive due to steady warm temperatures and rain.

Avalanche Summary

Natural slab/loose wet avalanche cycle occurring in the region, especially BTL. Control work producing predictable loose wet and loose slabs from low elevation targets. Few observations due to very poor visibility.

Confidence

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.

Wet Slabs

Wet Slab avalanches are the release of a cohesive layer of snow (a slab) that is generally moist or wet when the flow of liquid water weakens the bond between the slab and the surface below (snow or ground). They often occur during prolonged warming events and/or rain-on-snow events. Wet Slabs can be very unpredictable and destructive.

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.