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Avalanche Forecast

Archived

Feb 13th, 2022–Feb 14th, 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.

Cooling trend, snow and cloud in the forecast.Monday's freezing levels are uncertain and there is still a potential for the heat of the afternoon to increase the hazard below tree line.

Weather Forecast

Monday:Cloudy with sunny periods and isolated flurries.

Precipitation: Trace.

Alpine temperature: High -3 °C.

Ridge wind west: 10-25 km/h.

Freezing level: 1700 metres.

Tuesday:A mix of sun and cloud with isolated flurries.

Precipitation: Trace.

Alpine temperature: Low -11 °C, High -7 °C.

Ridge wind northwest: 10-30 km/h.

Freezing level at valley bottom.

Snowpack Summary

Weak temperature crust on all aspects up to 1900m with a sun crust on solar aspects extending into alpine. Upper snowpack has settled but expect reactivity to increase during peak warming of the day. Exposed alpine stripped to rock at ridge top & open features. Dec Facets down 20-70cm. Basal faceting & depth hoar widespread throughout area.

Avalanche Summary

1 large natural cornice triggered slab observed on the Icefields road patrol on Sunday.No other avalanche activity observed on the Icefields Parkway or Maligne Lake Road Feb 11-12.

Confidence

Freezing levels are uncertain

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 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.