Archived

Avalanche Forecast

Dec 9th, 2017–Dec 10th, 2017

Alpine

1: Low

The avalanche danger rating in the alpine will be low

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

1: Low

The avalanche danger rating in the alpine will be low

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

Regions: North Columbia.

Seek the shade for the best and safest riding.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

We'll see little change in the weather pattern: valley cloud and cool temperatures down low but sunny and warm up high. SUNDAY: Cloudy with sunny breaks. Light to moderate south-west winds. Freezing level near 1700 m.MONDAY: Sunny with cloudy periods. Light wind. Freezing level near 1500m with an above freezing layer at 3000 m. Alpine high temperatures near +3.TUESDAY: Sunny with increasing cloud in the afternoon. Light wind. Freezing level near 2000 m with a colder air layer in the valleys.

Avalanche Summary

On Friday, a Size 2 dry loose avalanche was reported at 2300m on a south east aspect near Rogers Pass. A large size 3 natural avalanche was reported on a steep north-facing alpine face in the Selkirks. The failure layer is unknown, but it was likely an early season crust.

Snowpack Summary

Daytime warming will melt and weaken upper snowpack layers, particularly on steep sunny slopes. Warming also has the potential to wake up more deeply buried crust layers which formed in November and October. On the whole, these crusts have been showing reasonable bonding in snowpack and slope tests. Below treeline, the snowpack is shallow--look out for early season hazards like open creeks and tree stumps.

Avalanche Problems

Loose Wet

Loose wet avalanches are possible in steep, rocky, sunny terrain. Warming could also wake up more deeply buried weak layers, creating a surprisingly large avalanche.

Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.Use caution above cliffs and terrain traps where small avalanches may have severe consequences.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2