18-19
GNFAC Avalanche Forecast for Fri Nov 30, 2018
<p><u>The Bridger, Madison, Gallatin Ranges, and mountains around Cooke City</u></p>
<p>Minimal snow and wind the past few days has helped stability. On Wednesday, my partner and I skied around Beehive Basin and found generally stable conditions <strong><a href="https://www.mtavalanche.com/photos">photo</a></strong>. This is consistent with other observations from the area. Without widespread persistent weak layers <strong><a href="https://www.youtube.com/watch?v=CF0zmpxFeM8&t=0s&list=PLXu5151n…;, instabilities remain isolated to upper elevation slopes previously loaded by west-southwest winds.</p>
<p>Pockets of wind drifted snow will be stubborn and hard to move today, but still need to be assessed carefully. Watch for this problem below upper elevation ridgelines and cross loaded terrain features. As demonstrated by the skier triggered avalanche on Monday, it only takes a small slide to create a potentially dangerous situation <u><strong><a href="https://youtu.be/q1aqN4N6Gww">video</a></strong></u>.</p>
<p>Although isolated areas of instability still exist, the snowpack is generally stable and the avalanche danger is rated <strong>LOW</strong>.</p>
<p>The snowpack in the Lionhead area outside West Yellowstone is shallow and weak. On Monday, Alex found a 2’ deep snowpack consisting of sugary facets capped by 6” of new snow (<u><strong><a href="https://www.mtavalanche.com/images/18/shallow-weak-snowpack-lionhead">p…;). His <u><strong><a href="https://youtu.be/hl5lygIF7s4">video</a></strong></u><strong> </strong>shows the crumbly nature of the facets and their inability to support much weight. Without new snow and wind the past few days, stability in this area has improved. However, a poor snowpack structure continues to raise red flags. Before committing to steep terrain, assess the snowpack carefully and avoid slopes where dense wind-blown snow rests over weak facets near the ground.</p>
<p>Today, human triggered avalanches are possible on wind loaded slopes which have a <strong>MODERATE </strong>avalanche danger. Non-wind loaded slopes have a <strong>LOW</strong> avalanche danger.</p>
Upcoming Avalanche Education and Events
Our education calendar is full of awareness lectures and field courses. Check it out: Events and Education Calendar.
IDAHO
Tomorrow! Klim Winter Kick-Off and avalanche awareness, Rigby, Idaho
BOZEMAN
December 5, 1-hr Avalanche Awareness, 6-7 p.m. at REI, Bozeman
Weather and Avalanche Log for Fri Nov 30, 2018
Daily avalanche forecasts start.
In Beehive Basin, the snowpack is thin and weak on west and south facing slopes. A poor snowpack structure will make slab avalanches likely on these slopes with the arrival of new and wind-blown snow. Photo: GNFAC.
In Beehive and Bear Basin, the snowpack is generally strong and stable on east and north facing slopes below treeline. Photo: GNFAC
Weather and Avalanche Log for Thu Nov 29, 2018
High pressure today. Not much going on.