Archived

Avalanche Forecast

Mar 3rd, 2019–Mar 4th, 2019

Alpine

1: Low

The avalanche danger rating in the alpine will be low

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

1: Low

The avalanche danger rating in the alpine will be low

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

1: Low

The avalanche danger rating in the alpine will be low

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.

Although the likelihood of triggering a persistent slab has decreased, the problem still exists. Continue to employ a conservative approach to terrain selection.

Confidence

High - The weather pattern is stable

Weather Forecast

MONDAY: Mainly sunny / light to moderate east wind / alpine temperature -4 CTUESDAY: A mix of sun and cloud / light to moderate southeast wind / alpine temperature -3 CWEDNESDAY: Mainly cloudy with scattered flurries / light to moderate southeast wind / alpine temperature -3 C

Avalanche Summary

There have been no new reports of avalanche activity in the past few days.

Snowpack Summary

In exposed areas the upper snowpack has been wind affected and stiff wind slabs exist. In sheltered areas you can still find pockets of low density snow. A crust and in some places surface hoar can be found down 50 cm below the surface. Approximately 60-110 cm below the surface is a layer of sugary facets sitting on a crust that continues to be reactive in snowpack tests, especially on north aspects. This layer seems to be more reactive in the North Shore Mountains. The problem is not typical for the region and we expect this persistent layer to linger into the future. The lower snowpack is generally strong.

Avalanche Problems

Persistent Slabs

A weak layer of sugary facets sitting a crust is buried 50-100 cm deep. This problem seems to be most prevalent in the North Shore mountains.

Be aware of the potential for wide propagations due to the presence of a buried weak layer.Use conservative route selection, choose moderate angled and supported terrain with low consequence.Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

Aspects: All aspects.

Elevations: Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3

Wind Slabs

Isolated wind slabs may be reactive especially on southwesterly aspects.

If triggered wind slabs may step down to deeper layers resulting in large avalanches.Use caution above cliffs and gullies where small avalanches may have severe consequences.

Aspects: South, South West, West.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 1.5