Avalanche Bulletin - South Coast

Avalanche Bulletin - South Coast

Date Issued:

Valid Until:

Forecaster:JSmith

Lingering wind slabs formed by 20-30 cm of recent snow may remain reactive on lee features in the alpine.

 Avoid exposure to steep sun exposed slopes. 

Sat, 23 AprSun, 24 AprMon, 25 Apr
Alpine2 Moderate1 Low2 Moderate
Treeline1 Low1 Low1 Low
Below Treeline1 Low1 Low1 Low
Confidence: Moderate
  • Uncertainty is due to the limited number of field observations.

Travel and Terrain Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Caution around slopes that are exposed to cornices overhead.
  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • Avoid exposure to steep sun exposed slopes.

Wind Slab

Lingering wind slabs formed by 20-30 cm of recent snow may remain reactive on lee features in the alpine.

Use ridges or ribs to avoid areas of wind loaded snow. 

Wet Loose

Small wet loose avalanches may occur on all aspects as freezing levels rise to mountain tops.

Avoid big, steep, alpine slopes that are getting cooked by the sun.

Forecast Details

Avalanche Summary

Numerous small (size 1) naturally triggered wet loose avalanches were reported on all aspects below treeline on Thursday.

We currently have very limited avalanche observation data from this region.

Please consider posting your observations to the Mountain Information Network (MIN). Photos of current conditions and avalanches are the most helpful. 

Snowpack Summary

Lingering wind slabs formed by 20-30 cm of recent snow may remain reactive on lee features in the alpine.

The recent snow is sitting on a variety of hard snow surfaces, including crusts and wind scoured snow. 

Below this, there are several crusts in the upper snowpack. In areas where there are weak facets sitting on top of the crusts, there is potential for large natural avalanches when freezing levels reach mountain tops for multiple days.

Avoid large slopes and avalanche paths during periods of intense warming.

Cornices are large and more prone to failure during periods of intense warming.

Weather Forecast

Friday night: Clear / Light west wind / Low of 1 / Freezing level 1400 m.

Saturday: Sunny / Light southwest wind / High of 10 / Freezing level 1800 m.

Sunday: Cloudy during the day, then 15-20 cm snow overnight (rain below around 1300 m) / Moderate southwest wind / High of 9 / Freezing level 1700 m.

Monday: Mix of sun and cloud / Light southwest wind / High of 7 / Freezing level 1300 m.

Source: avalanche.ca

Avalanche Bulletin - South Coast