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Avalanche Forecast

Archived

Nov 9th, 2019–Nov 10th, 2019

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

Regions

Kananaskis.

More snow is coming starting saturday night. It is uncertain how well it will bond with underlying surfaces. Keep terrain conservative until this question is answered.

Confidence

High -

Weather Forecast

Snow is coming. Some models suggest upwards of 15 cm by Sunday evening. All models agree with the expected alpine winds being sustained at the 40-60km/hr mark. Temperatures have already cooled to below zero and are expected to settle at -18 by Sunday night.

Avalanche Summary

Some pin wheeling and minor wet loose avalanches were seen yesterday. The majority were small, but in terrain traps they are significant enough to be a worry.

Snowpack Summary

Yesterday's warmer than expected weather made for moist snow up to 2400m (estimated). In sheltered alpine areas, the "refrigerated" pockets likely kept the snow dry. The Bow Valley saw some rain to basically peak height. Because of that there is now a new surface crust present. This rain likely occurred in the front ranges and possibly even Highwood Pass. In addition, we still have those deeper October crusts near the ground. So far they haven't done much in terms of being a weak layer, but the clock is ticking. In your respective ski areas, its worth having a look and seeing if its started to deteriorate.

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.