Archived

Avalanche Forecast

Nov 25th, 2018–Nov 26th, 2018

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

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

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: Cariboos.

Forecast snowfall amounts and freezing levels are uncertain. Expect the hazard to increase throughout the day at all elevations in areas experiencing heavy snowfall, above freezing temperatures or high winds.

Confidence

Weather Forecast

Significant snowfall amounts, rising freezing levels and strong winds are forecast to begin Sunday night, and last into Tuesday. Forecast snowfall amounts vary throughout the region, with higher amounts forecast in the southern Cariboos.SUNDAY NIGHT - Flurries, 5-10 cm / moderate southerly winds / freezing level 1000mMONDAY - Snow, 10-25 cm / moderate to strong southerly winds / freezing level 1500-2000mTUESDAY - Flurries, 5-10 cm / light to moderate southerly winds / freezing level 1500-2000m WEDNESDAY - Partly cloudy with isolated flurries / light to moderate southerly winds / freezing level 1500m

Avalanche Summary

No recent avalanche observations have been reported in the region. This may be due to low numbers of field observations rather than a lack of avalanche activity.

Snowpack Summary

5-10 cm of new snow on Sunday night brings recent storm snow amounts to 25-30 cm. This snow sits on top of a weak layer of surface hoar (feathery crystals) and sun crust on steeper south facing slopes. New snow, wind and rising freezing levels throughout the day will increase the likelihood of triggering avalanches on this layer.At the base of the snowpack there is a crust that formed in late October. There have been very limited reports of this layer showing signs of reactivity in the Cariboos, however with strong winds, rising freezing levels and heavy snowfall amounts, this layer could wake up during this storm. Storm snow avalanches may have the potential to trigger large, full depth avalanches on this layer.Snowpack depths taper quickly with elevation.

Avalanche Problems

Storm Slabs

25-30 cm of recent snow sits above a weak layer of feathery surface hoar crystals at upper elevations. The likelihood of triggering this layer will increase with additional snow, wind and warm temperatures.

Be extra cautious around sheltered openings near treeline where surface hoar may be most prominent.Be careful with wind loaded pockets, especially near ridge crests and roll-overs.If triggered, the storm slabs may step down to deeper layers resulting in large avalanches.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2