Backcountry

Avalanche Advisory

Forecast provided by Avalanche Canada.

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

 

Patrol - Emergency

For on hill emergencies only

604-935-5555
 

BACKCOUNTRY ADVISORY

Issued at: 4/25/2019 11:49:41 PM Valid to: 4/26/2019 9:00:00 PM

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

No recent avalanche observations have been reported.

SNOWPACK SUMMARY

In the alpine, up to 10 cm cold wind-affected snow is holding onto northerly aspects. Southerly winds have produced isolated wind slabs around ridges and in the immediate lee of slopes in the alpine. Cornices have been failing recently.

A crust is found on solar alpine slopes and all aspects below. Warm overnight temperatures are preventing strong crust recovery as you lose elevation. Expect thin surface crusts to break down quickly with daytime warming and rain. Below treeline the snowpack is saturated and rapidly melting.

WEATHER FORECAST

FRIDAY: Mix of sun and cloud. Alpine temperatures near -2 and freezing levels 1700 m. Ridgetop wind moderate from the west.

SATURDAY: Cloudy with sunny periods. Alpine temperatures near -3 and freezing levels 1500 m. Ridgetop wind moderate from the west.

SUNDAY: Cloudy with sunny periods. Alpine temperatures near -3 and freezing levels 1500 m. Ridgetop wind moderate from the west.

CONFIDENCE

Moderate - Due to the number of field observations

TODAY'S DANGER SCALE

Alpine
Treeline
Below treeline
2 - Moderate
1 - Low
1 - Low

DANGER SCALE FORECAST

OVERVIEW Friday Saturday Sunday
Alpine Moderate Moderate Moderate
Treeline Low Low Low
Below treeline Low Low Low

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.

Wind Slabs

Southerly winds have produced isolated pockets of wind slab around ridges and in the immediate lee of slopes.

What Elevations?
What Aspect?
Chances of Avalanches?
Expected Size?

Travel and Terrain Advice

  • Be careful with wind-loaded pockets, especially near ridge crests.
  • Be cautious as you transition into wind affected terrain.

Loose Wet

The likelihood of loose wet avalanches will depend on the extent of overnight crust recovery and the pace at which the warms and rains through the day.

What Elevations?
What Aspect?
Chances of Avalanches?
Expected Size?

Travel and Terrain Advice

  • Avoid terrain traps such as cliffs and gullies that increase the consequence of small avalanches.
  • Cornices are reported to be touchy. Give a wide berth when travelling on or below ridges.

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.