Avalanche Forecast

Archived

Nov 13th, 2021–Nov 14th, 2021

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Below Threshold.

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.

Regions

Jasper.

The avalanche hazard is expected to rise over the next couple of days. With limited early season observations and uncertainty in the amount of incoming precipitation, please approach avalanche terrain cautiously.For possible hwy closure info 511AB.

Weather Forecast

Sunday: Snow.; Accumulation: 23 cm; Alpine temperature: High -1 °C; Wind southwest: 20 km/h gusting to 50 km/h.

Monday: Snow, heavy at times; Accumulation: 42 cm; Alpine temp: Low -12 °C, High 0 °C; Light wind gusting to 40 km/h.

Tuesday: Isolated flurries; Precipitation: Trace; Alpine temperature: Low -18 °C, High -10 °C; Wind west: 15-35 km/h.

Snowpack Summary

25 cm of new snow at Parkers ridge in the past 24 hours with moderate to strong south west winds. Alpine and tree-line areas are slowly gaining enough snow for avalanches, particularly in leeward alpine bowls, gullies, and around ridge lines.

Avalanche Summary

No new avalanches have been observed by the road patrol on Saturday. 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

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.