Avalanche Forecast

Avalanche Bulletin - Jasper National Park

Date issued

Oct 24, 2017 - 4:44 PM

Valid until

until further notice

Prepared by

jonas hoke

There is plenty of snow to create avalanche problems at upper elevations. Be prepared with the proper equipment and a winter mindset if you are heading in to the alpine.

Danger Ratings
Problems
Details

Early Season Conditions

Insufficient observations exist to reliably rate the avalanche danger. Expect shallow snow cover with thinly buried rocks and trees just beneath the surface. Avalanche danger often concentrates in gullies and other deposition areas, where windslabs may bond poorly to a weak underlying base. Deeper snow usually exists at higher elevations.

More Early Season Details

Avalanche Summary

Loose dry avalanches up to size 1 occurred in alpine lees today with ongoing windloading. Loose wet avalanches up to size 1 were triggered on S aspects at treeline today with daytime warming. Naturally triggered windslabs up to size 2.0 have occurred on alpine E aspects in the past 24-48hrs.

Snowpack Summary

The start of our winter snowpack is developing above 2000m, snow depths range from 50-100+ cm in the Columbia Icefields region. Several days of strong SW winds have stripped many exposed areas down to bare ground or the supportive crust near the base of the snowpack. These winds also continue to build windslabs in lee terrain.

Weather Forecast

A frontal system passing through on Wednesday will bring strong SW winds, and up to 10 cm of snowfall at treeline and in the alpine (rain below treeline).

An upper level ridge will build in the wake of this system giving increasingly clear skies and warming temperatures in to the weekend.

Danger Ratings Explained

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.

Natural 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.

Avalanche Forecasts in your Inbox

Avalanche Canada has switched to an RSS feed for its daily forecasts. This is a much more flexible method that allows automatic delivery to your email inbox, or to an RSS reader of your choice.

What are RSS feeds?

RSS (Really Simple Syndication) is a popular standardized file format allowing up-to-date delivery of web-based content. RSS feeds enable you to receive content updates from websites, delivered to your email through an RSS aggregator (such as blogtrottr.com) or viewed through applications called RSS readers (such as feedly.com).

Set up an RSS feed for your email:

Select a RSS aggregator

Avalanche Bulletin - Jasper National Park URL: http://www.avalanche.ca/api/forecasts/jasper.rss
Copy the url and paste it into the appropriate field of your RSS aggregator.
Fill in your email address.
Voila! Watch the Avalanche Canada forecast roll into your inbox.

Forecast Disclaimer

Avalanche Canada's Public 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 this 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.