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Avalanche Forecast

Archived

Jan 21st, 2024–Jan 22nd, 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, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Sea To Sky, Brandywine, Garibaldi, Homathko, Spearhead.

New snow, accompanied by southerly winds, continues to accumulate over a recently formed melt-freeze crust.

Confidence

High

Avalanche Summary

Several natural and explosive-triggered storm slab avalanches were reported on Saturday in alpine terrain, up to size 2.

At lower elevations, many loose wet avalanches occurred up to size 1, both natural and rider-triggered.

If you go out in the backcountry, please consider sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

Light snowfall continues, gradually accumulating above a widespread melt-freeze crust found at all elevations.

Below the crust is approximately 20 cm of upside-down snow sitting atop old wind-affected surfaces and faceted crystals from the recent period of extreme cold and outflow winds.

The mid and lower snowpack consists of various old crusts and is generally well-settled and well-bonded.

Weather Summary

As a series of smaller low-pressure systems move through the region this week, expect warmer and wetter conditions in the southwest around Squamish and generally becoming drier and colder as they move northeast, towards the Whistler area.

Sunday Night

Cloudy with 0 to 5 cm of snow and rain at valley bottoms, south alpine winds 20 to 30 km/h, treeline temperature -1 °C.

Monday

Cloudy with 2 to 8 cm of snow and rain at valley bottoms, southwest alpine winds 20 to 30 km/h, treeline temperature -1 °C.

Tuesday

Cloudy with 5 to 10 cm of snow and rain at valley bottoms, southwest alpine winds 20 to 40 km/h, treeline temperature -1 °C.

Wednesday

Cloudy with 2 to 8 cm of snow and rain at valley bottoms, southwest alpine wind 30 to 50 km/h, treeline temperature -1 °C.

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 carefull around freshly wind loaded features.
  • Watch for fresh storm slabs building throughout the day.

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.