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Avalanche Forecast

Archived

Nov 14th, 2021–Nov 15th, 2021

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

Regions

Jasper.

Up to 50mm by Monday night expected on the Parkway.With limited early season observations and uncertainty in the amount of incoming precipitation, please approach avalanche terrain cautiously.For highway closures on 93N check 511AB.

Weather Forecast

Monday: Snow, heavy at times. Accumulation: 37 cm. Alp temperature: High -1 C; Wind southwest: 20 km/h gusting to 50 km/h; Freezing level: 2000 metres.Tuesday: Precipitation: Nil; Alp temperature: Low -16 C, High -12 C; Wind west: 15 km/h up to 50 km/h.Wednesday: Precipitation: Nil; Alp temperature: Low -18 C, High -11 C; Wind west: 10 km/h.

Snowpack Summary

Around 40 cm of new snow at Parkers ridge in the past 48 hours with moderate to strong south west winds. Alpine and tree-line areas are now gaining enough snow for avalanches, particularly in leeward alpine bowls, gullies, and around ridge lines.

Avalanche Summary

Road patrol observed one small loose dry avalanche running in a steep narrow gully, no alpine or tree line observations due to poor visibility all day. There have been reports of smaller isolated wind slabs in alpine features over the past week, but not a lot of people are out in the mountains so take that into account in your decision making.

Confidence

Forecast snowfall amounts are uncertain on Monday

Problems

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.

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.