Archived

Avalanche Forecast

Feb 11th, 2019–Feb 12th, 2019

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

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

2: Moderate

The avalanche danger rating below treeline will be moderate

Regions: South Coast.

20 cm snow falling Tuesday will raise avalanche hazard to Moderate through the day. As snowfall accumulates, the deepest and most reactive deposits will be at higher elevations in wind-loaded terrain.

Confidence

Moderate - Forecast snowfall amounts are uncertain on Tuesday

Weather Forecast

MONDAY NIGHT: Flurries, 10-15 cm snow. Treeline temperatures near -6C. Ridgetop winds moderate from the southeast.TUESDAY: Flurries, 5-10 cm snow. Treeline temperatures near -3C. Ridgetop winds moderate from the south.WEDNESDAY: Sunny with cloudy periods. Treeline temperatures near -5C. Ridgetop winds light from the east.THURSDAY: Flurries, 10 cm accumulation. Treeline temperatures around -2C, freezing level rising to 1300 m. Ridgetop winds moderate from the east.

Avalanche Summary

Small size 1 wind slabs were reactive to skier traffic over the weekend, no recent natural avalanches have been reported.

Snowpack Summary

After Monday's new snow, another 20 cm is expected to accumulate by the end of the day Tuesday. Moderate winds will redistribute falling snow and begin developing cohesive slabs that may not bond well to the wind-affected surface snow it's falling on. The new snow covers a variety of wind affected surfaces from scoured and wind-pressed to stiff wind slabs as a result of the recent extreme wind event. Widespread wind slabs developed in the alpine with pockets of soft snow in sheltered areas and lower elevations. This layer of wind-affected snow sits above a crust, old wind-pressed snow surfaces, or surface hoar in the most sheltered areas. The mid-pack is well-settled and strong.

Avalanche Problems

Storm Slabs

Around 20 cm new snow is expected to accumulate Tuesday falling with moderate southerly winds. Storm slabs will develop through the day with the deepest deposits in wind-loaded terrain.

The recent snow may now be hiding windslabs that were easily visible before the snow fell.Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2