Backcountry

Avalanche Advisory

Forecast provided by Avalanche Canada.

Daily avalanche forecasts are due to start on Friday, November 23, 2018.


BACKCOUNTRY ADVISORY

Issued at: 10/1/2018 10:00:00 PM Valid to: 1/1/0001 12:00:00 AM

This three day avalanche hazard forecast is prepared for the Sea to Sky Region including surrounding areas of Whistler Blackcomb - Terrain easily accessible as a day tour from Whistler Blackcomb’s boundaries. This advisory refers to areas outside the ski are boundary.

AVALANCHE SUMMARY

Avalanche danger will rise during and immediately after a snow storm. If the temperature rises during or after a storm, or if there is rain, avalanche danger is likely to rise further. Avalanches are more likely if local reports include observations of weak layers.

SNOWPACK SUMMARY

If there's enough snow to ride, there's enough snow to slide.

Winter-like wind and storm slabs form readily in alpine bowls--this is generally where avalanches first start to occur. On smooth terrain like glaciers, slopes where there was summer snow, grassy slopes, shale slopes and rock slabs as little as 30cm of snow is enough to create avalanches. On rougher terrain, 50-100 cm snow is generally required.

In some areas, early season weak layers may form. The most common scenario is a layer of sugary snow (facets) that grows near the ground when temperatures get cold and there isn't much snow cover. Facets may also be found on glaciers at the bottom of this seasons snowfall.

WEATHER FORECAST

Avalanche Canada's Mountain Weather Forecast is now in winter mode focusing on snow amounts, freezing levels and other aspects of weather important to assessing winter conditions in the mountains. These daily briefings are available here at avalanche.ca/weather

SPOTWX (spotwx.com) is a good resource for local scale weather forecasts.

CONFIDENCE

-

TODAY'S DANGER SCALE

Alpine
Treeline
Below treeline
No Rating
No Rating
No Rating

DANGER SCALE FORECAST

OVERVIEW Tuesday Wednesday Thursday
Alpine No Rating No Rating No Rating
Treeline No Rating No Rating No Rating
Below treeline No Rating No Rating No Rating

1 - Low

  • Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
  • Natural and human-triggered avalanches unlikely.
  • Small avalanches in isolated areas or extreme terrain.

2 - Moderate

  • Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
  • Natural avalanches unlikely; human-triggered avalanches possible.
  • Small avalanches in specific areas; or large avalanches in isolated areas.

3 - Considerable

  • Dangerous avalanche conditions. Careful snowpack evaluation, cautious route-finding and conservative decision-making essential.
  • Naturale avalanches possible; human-triggered avalanches likely.
  • Small avalanches in many areas; or large avalanches in specific areas; or very large avalanches in isolated areas.

4 - High

  • Very dangerous avalanche conditions. Travel in avalanche terrain not recommended.
  • Natural avalanches likely; human-triggered avalanches very likely.
  • Large avalanches in many areas; or very large avalanches in specific areas.

5 - Extreme

  • Avoid all avalanche terrain.
  • Natural and human-triggered avalanches certain.
  • Large to very large avalanches in many areas.

FORECAST DISCLAIMER

USE AT YOUR OWN RISK:

The Whistler Blackcomb Avalanche Bulletin and other information and services provided by Avalanche Canada are intended for personal and recreational purposes only.

THIS INFORMATION IS PROVIDED 'AS IS' AND IN NO EVENT SHALL THE PROVIDERS BE LIABLE FOR ANY DAMAGES, INCLUDING, WITHOUT LIMITATION, DAMAGES RESULTING FROM DISCOMFORT, INJURY, OR DEATH, CLAIMS BY THIRD PARTIES OR FOR OTHER SIMILAR COSTS, OR ANY SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, ARISING OUT OF THE USE OF THE INFORMATION.

The user acknowledges that it is impossible to accurately predict natural events such as avalanches in every instance, and uses the data in the bulletin with this always foremost in mind. The accuracy or reliability of the data is not guaranteed or warranted in any way and the Providers disclaim liability of any kind whatsoever, including, without limitation, liability for quality, performance, merchantability and fitness for a particular purpose arising out of the use, or inability to use the data.