Archived

Avalanche Forecast

Nov 25th, 2022–Nov 26th, 2022

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

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: Harrison-Fraser.

Reactive slabs will first form in wind-loaded areas as new snow accumulates and the wind intensifies through the day.

Confidence

Moderate

Avalanche Summary

No new avalanches have been observed or reported in the region. Observations are limited at this time of year, if you head into the backcountry consider submitting a MIN report.

Snowpack Summary

On Friday winds quickly impacted up to 15 cm fresh snow. Accumulation totals quickly tapered with elevation.

A weak drought layer is down 20-50 cm. This layer consists of hard, wind-affected snow in the alpine, surface hoar or facetted snow in sheltered areas, and a crust on solar aspects and at low elevations. Below this drought layer, several other facet-crust interfaces exist in the snowpack.

Typical snow depth ranges from 50-100 cm in the alpine and 40-60 cm at treeline. Expect early season conditions and rugged travel. Below treeline is below the threshold for avalanches.

Weather Summary

Friday night

Cloudy with isolated flurries, trace accumulation. Light west wind increasing overnight, treeline temperatures below -5 C, freezing level dropping below 1000 m.

Saturday

Snowfall and wind will intensify throughout the day. Up to 10 cm accumulating by 4 pm Saturday as south-southwesterly winds increase to strong. Alpine high -4 C. Freezing level 1100 m.

Sunday

Snowfall and extreme winds are expected overnight, with up to 25 cm of new snow by morning. Convective flurries may continue through the day. West wind decreasing to moderate, treeline temperatures dropping to -10 C, and freezing level dropping to valley bottom.

Monday

Cold, with a mix of sun and cloud. Light to moderate southerly wind, treeline lows down to -20 C, and freezing level valley bottom.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

Seek out sheltered terrain where new snow hasn't been wind-affected.
Wind slabs are most reactive during their formation.

Avalanche Problems

Wind Slabs

Expect to find increasingly reactive slabs in wind-loaded areas, as snowfall accumulation and wind will intensify throughout the day.

Aspects: North, North East, East, South East, North West.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2