Archived

Avalanche Forecast

Nov 26th, 2017–Nov 27th, 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

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

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

Regions: South Coast.

Cooling temperatures are set to stabilize the snowpack.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

Monday: Mainly cloudy with isolated flurries and a trace of new snow. Light to moderate west wind. Freezing level to 900 metres with alpine temperatures of -3.Tuesday: Heavy rain transitioning to snow at high elevations. Approximately 30mm accumulation. Strong to extreme southwest winds. Freezing level dropping from 1400 to 1200 over the day with alpine temperatures around 0.Wednesday: Mainly cloudy with isolated wet flurries and a possible trace of new snow. Light west winds. Freezing level to 1300 metres with alpine temperatures around 0.

Avalanche Summary

No recent avalanches have been reported. However, the recent rain-on-snow event is suspected to have caused a natural, loose wet avalanche cycle. Looking forward, cooling temperatures are set to stabilize the existing snowpack while light new snow amounts may form touchy but thin new wind slabs in lee terrain at higher elevations.

Snowpack Summary

There are limited reports on snowpack structure at this time, except that recent heavy rainfall has saturated the snowpack at all elevations and washed away much of the snow at lower elevations. Travel below treeline is becoming more and more rugged, with many open creeks and early season hazards. Snow depth varies from 40-130 cm for elevations between 900m and 1200m across the region.

Avalanche Problems

Wind Slabs

Thin new wind slabs may exist in lee terrain at the highest elevations in the region. Forecast wind and light snowfall may make a small contribution to their size and reactivity.

Be alert to conditions that change with elevation.Use caution in lee areas in the alpine. Thin new wind slabs may have formed at the end of the storm

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 1