Avalanche Forecast

Issued: Nov 24th, 2024 2:15PM

The alpine rating is considerable, the treeline rating is moderate, and the below treeline rating is low. Known problems include Persistent Slabs and Wind Slabs.

Avalanche Canada matt, Avalanche Canada

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Beautiful day out there today, hopefully tomorrow is the same. Watch for subtle signs of wind loading in the alpine. Open areas were starting to look wavy this afternoon- a clear indicator of wind slabs.

Summary

Confidence

Moderate

Avalanche Summary

We had a good look around today and saw evidence of an isolated cycle from likely 24 hours ago. This activity was focused around Highwood, but it likely extends further. Most action was on NW to E (clockwise) aspects, up to sz 2 and running far in confined terrain.

Snowpack Summary

The Highwood area has had more wind affect than other areas. While it isn't wind scoured by any means, there are some higher areas showing waves and ripples. Interestingly, the loading pattern suggests both north and south flows last night. Expect some cross loading on east and west aspects. Elsewhere on the Spray there wasn't much evidence of wind. Still looks like winter. We've seen a few centimeters of settlement on all the weather stations, and it looks as though the snowpack has regionally settled. Surface roughness is starting to show through. Our young snowpack is rapidly ageing. On that note, as the cold clear nights continue expect the snowpack to begin to facet and lose strength.

Weather Summary

What we can expect tonight and tomorrow:

Tonight: predicted lows of about -10, but likely a bit cooler as skies will be clear this evening. Winds are still freakishly light. We may see light winds at ridge, but not enough for significant transport.

Tomorrow: A mix of sun and cloud, no snow and light winds(20km/hr@2700m). Temperatures maxing out at -8 by early afternoon.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.
  • Keep in mind a buried crust offers an excellent bed surface for avalanches.

Problems

Persistent Slabs

An icon showing Persistent Slabs

This slab is sitting on the October crust which has facets above it and provides a good sliding surface. More reactive on N and E aspects

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2.5

Wind Slabs

An icon showing Wind Slabs

Wind direction more variable in the alpine, hence the all aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Valid until: Nov 25th, 2024 3:00PM

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