Avalanche Bulletin - South Coast Inland

Avalanche Bulletin - South Coast Inland

Date Issued:

Valid Until:

Forecaster:JSmith

Large cornice failures are more likely during periods of hot and sunny weather. Use caution when traveling on corniced ridgetops and limit your exposure to slopes with large cornices overhead.

Lingering wind slabs may remain reactive on lee features in the alpine.

Sat, 23 AprSun, 24 AprMon, 25 Apr
Alpine2 Moderate1 Low1 Low
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

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

Cornice

Cornices may be weak and reactive to human triggers. They create a significant falling hazard, and may produce large slab avalanches as they fall onto the slope below.  

Cornice failures are more likely during hot and sunny weather.

Wind Slab

Lingering wind slabs 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 should be expected on steep, solar aspects when the sun comes out.

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

Forecast Details

Avalanche Summary

Small (size 1) natural wet loose avalanches on solar aspects were reported 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 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 very large and more prone to failure during periods of intense warming.

Weather Forecast

Friday night: Clear / Light west wind / Low of -7 / Freezing level 1100 m.

Saturday: Sunny / Light southwest wind / High of 5 / Freezing level 2000 m.

Sunday: Sunny in the morning, then increasing cloud throughout the day and 5-10 cm snow overnight ( rain below around 1400 m) / Moderate south wind / High of 6 / Freezing level 2100 m.

Monday: Mostly cloudy / Moderate southwest wind / High of 2 / Freezing level 1500 m.

Source: avalanche.ca

Avalanche Bulletin - South Coast Inland