Archived

Avalanche Forecast

Apr 5th, 2019–Apr 6th, 2019

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

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: South Coast Inland.

Forecast precipitation amounts are highly variable between weather models. Snow is expected above 1400 m, with associated extreme southwest wind. The snow could be touchy above the snow-rain line on Saturday.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

FRIDAY NIGHT: Cloudy with snowfall, accumulation 10 to 15 cm, moderate to strong southwest wind, alpine temperature -4 C, freezing level 1900 m dropping to 1200 m.SATURDAY: Cloudy with snowfall, accumulation 5 cm, strong to extreme southwest wind, alpine temperature -4 C, freezing level 1400 m.SUNDAY: Cloudy with snowfall, accumulation 5 to 15 cm, light to moderate southwest wind, alpine temperature -4 C, freezing level 1600 m.MONDAY: Mix of sun and cloud, light southwest wind, alpine temperature -3 C, freezing level 1800 m.

Avalanche Summary

On Thursday, small loose wet avalanches were triggered naturally and by skiers within the recent storm snow. The likelihood of triggering avalanches will increase above the snow-rain line due to stormy conditions this weekend.

Snowpack Summary

Around 10 to 20 cm of snow is expected in the region Friday night into Saturday. The snow will fall with strong to extreme southwest wind. This snow will overly recent storm snow on high-elevation northerly aspects and a melt-freeze crust elsewhere. Below around 1900 m, the snow will fall onto a wet and well-settled snowpack. Snow is melting rapidly at lower elevations.

Avalanche Problems

Storm Slabs

Snowfall and extreme southwest wind are forecast above around 1400 m. Use caution in lee terrain features, where deposits will be deepest and most reactive. Assess snowfall amounts and the bond of the snow before committing into avalanche terrain.

Watch for quickly changing conditions during periods of heavy loading from new snow, wind, or rain.Expect conditions to change rapidly with elevation.Be careful with wind-loaded pockets, especially near ridge crests and roll-overs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2