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Archived

Avalanche Forecast

Feb 22nd, 2021–Feb 23rd, 2021
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: South Coast.

Avalanche danger is limited to high elevation alpine terrain where snow accumulated over the weekend.

Confidence

High - We have a good understanding of the snowpack structure and confidence in the weather forecast

Weather Forecast

Cool dry weather until the next storm arrives on Thursday.

MONDAY NIGHT: Cloudy, moderate west wind, treeline temperatures drop to -4 C.

TUESDAY: Some isolated flurries in the morning then clearing in the afternoon, moderate northwest wind at ridgetops, treeline temperatures around -2 C.

WEDNESDAY: Mostly sunny, light wind, treeline temperatures around -2 C.

THURSDAY: Flurries with 15-25 cm of snow, strong southwest wind, freezing level up to 800 m with treeline temperatures around -1 C.

Avalanche Summary

Some small (size 1) storm slab and wet slab avalanches were reported during the storm over the weekend, and a natural avalanche cycle likely occurred on Sunday night. Looking forward the only concern is upper treeline and alpine elevations where storm slabs may exist in steep terrain.

Snowpack Summary

A hard crust now caps the snowpack up to the tops of the North Shore mountains. High elevation terrain in other parts of the region could have up to 50 cm of recent snow, likely heavily wind affected. However there are no observations to confirm alpine conditions.

Terrain and Travel

  • Pay attention to isolated alpine features as well as cross-loaded features at treeline.
  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.

Avalanche Problems

Storm Slabs

While most areas are capped by a thick rain crust, high elevation terrain may have accumulated up to 50 cm of snow with storm slabs lingering on steep and wind loaded terrain features.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2