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Archived

Avalanche Forecast

Dec 20th, 2024–Dec 21st, 2024
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
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
2: Moderate
The avalanche danger rating at treeline will be moderate
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Brandywine, Garibaldi, Homathko, Sea To Sky, Spearhead, Tantalus.

Keep an eye on changing conditions throughout the day and be prepared to dial back your objectives.

Storm slabs could increase in size and sensitivity throughout the day.

Confidence

Moderate

Avalanche Summary

No new avalanches were observed in this region on Thursday.

Many natural and explosive triggered storm slab avalanches up to size 2.5 were reported on Wednesday. The majority of these avalanches occurred at treeline however a few occurred in the alpine. Avalanches were observed on all aspects.

Snowpack Summary

Up to 15 cm of new snow may have fallen by 4 pm on the 21st. This new snow will be accompanied by strong southerly winds which will form deeper deposits on northerly aspects.

A crust or moist snow will be observed on the surface at lower elevations.

A prominent crust with facets above from early December is down 80 to 140 cm at treeline. A layer of surface hoar may be found in sheltered areas at treeline at this depth.

The lower snowpack is well-settled with no layers of concern.

Weather Summary

Friday NightA mix of cloud and clear skies with up to 5 mm of mixed precipitation. 30 to 50 km/h southeast ridgetop wind. Freezing level around 1800 m.SaturdayCloudy with 10 to 15 mm of mixed precipitation. 40 to 60 km/h southeast ridgetop wind. Freezing level around 1900 m.

Sunday

Mostly cloudy with 5 to 10 cm of snow. 40 to 70 km/h southeast ridgetop wind. Freezing level falling to 1400 m.

Monday

Mostly cloudy with around 5 cm of snow. 20 to 40 km/h southeast ridgetop wind. Treeline temperature -1 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Don't let storm day fever lure you into consequential terrain.
  • Be careful as you transition into wind-affected terrain.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.

Avalanche Problems

Storm Slabs

Storm slabs will likely remain sensitive to rider traffic. At lower elevations, where precipitation is likely to fall as rain, wet loose avalanches are possible.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1.5 - 2.5