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Avalanche Forecast

Archived

Apr 15th, 2024–Apr 16th, 2024

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

Regions

North Columbia, South Columbia, Glacier, Esplanade, Jordan, North Selkirk, Shuswap, Dogtooth, West Purcell, Badshot-Battle, Central Selkirk, Goat, Gold, North Okanagan.

Forecast snowfall amounts vary across the region. Areas that receive more than 20 cm of new snow may face higher avalanche danger than anticipated.

Confidence

Moderate

Avalanche Summary

A couple of naturally triggered storm slab avalanches were reported over the weekend on various aspects in high alpine terrain.

A naturally triggered size 2.5 persistent slab avalanche was reported on an east aspect in the alpine on Saturday. The slab failed on a crust below recent storm snow. It was in steep, rocky, wind-affected terrain below an alpine ridgetop.

Snowpack Summary

Overnight snowfall may bury a variety of surfaces, including hard crusts, moist snow, or dry, powder snow.

The new snow may form cohesive, surface slabs in areas affected by wind or late in the day, resulting from daytime warming.

A series of crusts exist in the upper snowpack.

Weather Summary

Monday Night

Cloudy with 0 to 15 cm of snow at higher elevations, with as much as 25 cm in areas around Revelstoke. Freezing level 1200 m. 10 to 30 km/h west ridgetop wind. Treeline temperature -5 °C.

Tuesday

Cloudy with 0 to 10 cm of snow at higher elevations. Freezing level 1200 m. 10 to 30 km/h northwest ridgetop wind. Treeline temperature -5 °C.

Wednesday

Mix of sun and cloud. 0 to 20 km/h north ridgetop wind. Treeline temperature -5 °C. Freezing level 1400 m.

Thursday

Mostly sunny. 0 to 20 north ridgetop wind. Treeline temperature -5 °C. Freezing level 1400 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully monitor the bond between the new snow and old surface.
  • Be alert to conditions that change with aspect and elevation.
  • Dial back your terrain choices if you are seeing more than 30 cm of new snow.

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.