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Avalanche Forecast

Archived

Nov 26th, 2023–Nov 29th, 2023

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

Regions

Kananaskis, Bow Valley, Highwood Pass, North 40, Spray - KLakes.

Continued sunny sky's and no snow in the forecast. Be aware of sluffing in steeper terrain, Like above ice climbs.

Confidence

Moderate

Avalanche Summary

No new observed or reported.

Snowpack Summary

10-25cm of snow fell earlier in the week with lots of variety on depth based on location! Closer to the divide was less and the east side of the park saw a bit more snow. This new snow fell on a variety of snow surfaces from melt freeze crusts up to 2700m on solar aspects and older windslabs and facetted surfaces on polar aspects. Expect to encounter persistent slabs on lee aspects from winds earlier in the winter. These will be prominent along ridgelines and in gullies. Watch for triggering these slabs from thinner unsupported snowpack areas. Its still very early season out there with a generally low snowpack. Widespread surface hoar is also developing that may become a problem once it gets buried!

Weather Summary

No notable weather changes over the next 3 days. Light winds from the SW with higher winds at 3000m predominantly from the NW in the strong range. No snow and mostly sunny sky's dominate our region.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be carefull with sluffing in steep terrain, especially above cliffs and terrain traps.
  • Avoid terrain traps where the consequence of any avalanche could be serious.
  • Avoid lee and cross loaded slopes in the alpine.

Problems

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.