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Avalanche Forecast

Archived

Mar 4th, 2022–Mar 5th, 2022

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.
Below Treeline
Natural avalanches unlikely.

Regions

Jasper.

It's March and the sun is packing a punch. Cornices are large and deserve a lot of attention these days, avoid being under them when ever possible and don't stand on them.

Weather Forecast

Saturday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -8 C.

Ridge wind north: 10-20 km/h.

Freezing level at valley bottom.

Sunday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: Low -14 C, High -7 C.

Ridge wind west: 10-25 km/h.

Freezing level: 1400 metres.

Snowpack Summary

Feb 28-Mar 2 storm deposited 35cm of snow at Parkers Ridge Area. 10-15cm fell further to the North. Suspect a new sun crust on solar aspects from Friday. A crust down 25-40cm from the surface is decomposing but can still be found below 2500m on south aspects. There is a widespread weak facet layer at the bottom of the snowpack in all areas.

Avalanche Summary

Jasper Visitor Safety preformed avalanche control on Thursday in the Parkers Ridge zone. Explosives control produced a few slab avalanches up to size 2 on east aspects. One natural cornice avalanche Sz 2 was observed on Thur on Churchill this entrained loose dry snow.

Confidence

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.

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.