Lawinenlagebericht

Galena Summit & Eastern Mtns

Sawtooth Avalanche Center
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Lawinengefahr

Mon
Hochgebirge
1 · Gering
Waldgrenze
1 · Gering
Unterhalb
1 · Gering
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Veraltet — dieser Lagebericht ist 6 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Large avalanches are unlikely today. Wet snow avalanches will become possible as the day warms up. These will be most likely on slopes getting hit by the sun, and on all lower elevation slopes. Isolated wind drifts may still be sensitive to triggering in upper elevation terrain. 

If you are traveling in the Pioneer Mountains, refer to the forecast for the Soldier & Wood River Valley Mtns.

Lawinenprobleme

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1

    Observations yesterday indicated that things were pretty quiet on the wet slide front. I would expect a similar pattern today, but continue to monitor snow conditions as the day heats up and slopes get cooked by the sun. Loosely speaking, there are two types of wet snow problems to watch for:

    • At lower into middle elevations, the snowpack is in a typical melt-freeze cycle—starting out strong when frozen in the morning, and weakening as it becomes wet with daytime warming. Where the snowpack is shallow and weaker, this type of wet slide could gouge down to the ground once it gets moving.
    • At middle and upper elevations, loose snow avalanches could involve the recent snow that fell since the weekend (see photo at right). This will be more likely on E and W-facing slopes that are transitioning from dry to wet snow, but could extend into S aspects too.

    ADDITIONAL DISCUSSIONOn Wednesday in Baker Creek, Scott found wind slabs sitting atop facets that formed during the February dry spell, and on Thursday, a skier on Galena Summit was able to intentionally trigger a small wind slab where this layering existed. Since then, observers haven't reported any reactive wind drifts. If you manage to find a denser wind slab on a slope approaching 40 degrees, treat it with respect and avoid it if possible—especially in consequential terrain.

    If you are traveling in the Pioneer Mountains, refer to the forecast for the Soldier & Wood River Valley Mtns to read about the persistent slab problem you may encounter.

Avalanche Discussion

With the important exception of the SE corner of our forecast area, the snowpack throughout the regions is relatively stable and triggering a large avalanche is unlikely.

In the Little Wood drainage, the Pioneer Mtns, and near Bald Mtn, 16-20 inches of new snow fell earlier this past week. February was exceptionally dry in this particular area, which led to widespread faceted snow on mid and upper elevation shady slopes. When Ben went into this area a week ago, he observed several large natural avalanches (photo). While it's been a number of days since the snowfall ended, these type of persistent slab problems don't go away quickly. Triggering a dangerous avalanche—large enough to bury or kill you—remains possible in this portion of the forecast area. You're most likely to find this problem on mid to upper elevation slopes that face NE-N-NW.

The rest of the forecast area to the north and west received about 8-14 inches from this same storm, which wasn't quite enough load to lead to widespread instability. Here, we're trending towards a stable snowpack with the typical wet snow problems as the day heats up and the possibility of finding an isolated wind slab. Maintaining situational awareness as you move through the mountains will help you recognize and avoid these problems. How does the snow change as you go up in elevation and move onto different aspects? How are things changing as the day warms up? LOW danger is a double-edge sword—decreased likelihood of triggering a slide, but often we gravitate towards more consequential terrain where even a small slide could be dangerous.

Abgedeckte Regionen