GNFAC Avalanche Forecast for Thu Apr 4, 2019
<p>In many areas, temperatures barely dropped below freezing overnight, which will allow the snow surface to soften quickly as the day warms. This will increase the potential for small wet loose avalanches in steep terrain (<u><strong><a href="https://www.youtube.com/watch?v=2UiV-oyg9Gk&list=PLXu5151nmAvRNl9ku…;). Wet roller balls and pinwheels are signs the surface snow is becoming weak and unstable. Soft-slushy snow deeper than a boot top also indicates the surface snow is losing strength. Managing this problem isn’t difficult. Move to shadier aspects or away from steep terrain if the surface snow is becoming soft and damp. Fortunately, increasing clouds and breezy conditions will help limit wet loose avalanche activity today.</p>
<p>A secondary concern is new snow instabilities, specifically in the northern Madison Range. This area picked up 2-4” of snow overnight, which increases the potential for small wind slabs and loose snow avalanches (<u><strong><a href="https://www.youtube.com/watch?v=yOGak2sjA3s&list=PLXu5151nmAvRNl9ku…;). The new snow came in warm and should be well bonded to the old snow surface. However, the new snow will move easily under the influence of warmer temps and direct sun (<u><strong><a href="https://www.youtube.com/watch?v=sp2O8fG8U4g&list=PLXu5151nmAvRNl9ku…;). Both dry and wet loose avalanches will be possible in steep terrain, but these will be relatively small and easy to manage. Isolated wind slabs are an additional concern on upper elevation slopes loaded by west-southwest winds (<u><strong><a href="https://www.mtavalanche.com/images/19/snowmobile-triggered-slab-norther…;). If you’re gunning for high alpine objectives today, watch for this problem before committing to high consequence terrain.</p>
<p>Today, Generally safe avalanche conditions exist and the avalanche danger is rated <strong>LOW</strong>. Remember – <strong>LOW</strong> danger does not mean <strong>NO</strong> danger. Small avalanches remain possible in isolated areas or extreme terrain. </p>
<p>If you get out and have any avalanche or snowpack observations to share, contact us via our <u><a href="https://www.mtavalanche.com/node/add/snow_observation">website</a></u>, email (<u><a href="mailto:mtavalanche@gmail.com">mtavalanche@gmail.com</a></u>), phone (406-587-6984), or Instagram (#gnfacobs).</p>