Lawinenlagebericht

Togwotee Pass

Bridger-Teton Avalanche Center
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Lawinengefahr

Wed
Hochgebirge
2 · Mässig
Waldgrenze
1 · Gering
Unterhalb
Keine Stufe
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Veraltet — dieser Lagebericht ist 4 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Isolated wind drifts exist on upper elevation slopes, where triggering a 1+ foot thick avalanche in steep terrain is possible today. A steady stream of new and windblown snow is creating slabs that will likely be small in size but will remain sensitive today. And while unlikely, it remains possible to trigger a large, 4-5 foot thick avalanche—especially on steep, rocky, wind-affected slopes. 

Lawinenprobleme

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2

    The snowpack at middle and upper elevations this season has been plagued by a number of persistent weak layers, primarily on the southern half of the compass. The layers most likely to produce large avalanches in this zone are found near the base of the snowpack here, 2-3+ feet deep (dependent on aspect due to variability in snow depths), and consist of well-developed facets near the ground and crust+facet sandwiches.  Loading from snowfall and wind over the past week are likely not giving these weak layers any relief.

    You are more likely to trigger an avalanche on upper elevation, "prime-time" slopes steeper than about 35 degrees. Most upper-elevation slopes have received additional loading due to wind over the past few weeks. 

    ADDITIONAL DISCUSSION: Moderate to strong winds blowing out of the west and northwest will be able to transport new snowfall as well as snow that has remained dry over the past week and build fresh slabs and drifts in exposed, upper-elevation terrain. I expect them to remain isolated to ridgelines and exposed terrain features. While small, these slabs may be able to pick up steam as they travel downslope. Even small slides can have high consequences if they carry you through rocky, treed terrain or push you down into a terrain trap like a gully or a creek bed.

    Long story short, you can greatly reduce your risk of triggering an avalanche of any variety by sticking to wind-sheltered, mid-elevation slopes.

    (1/21/2023)

    Drinkard and an older glide avalanche in the background; this avalanche type is uncommon for mid-winter, and currently not a primary concern. Weak snow exists across the whole of Togwotee, and the snowpack and depth should be assessed before committing to riding a slope. Even a simple check for depth is helpful. 

    Photo: Antonioli

Avalanche Discussion

Adopting the pace of nature is easier said than done. Patience is one of the best tools I know of to deal with uncertainty. It's a way to purposefully slow down in the name of better comprehension and consciously add time to a process. One of the primary tests of patience is dealing with a persistent or deep persistent slab problem. When weather enters a holding pattern, more people enter higher in the alpine, less untouched snow is available, and I suddenly find myself with less of this magical quality. 

This is particularly true when assessing slopes that may or may not harbor a persistent problem type and subsequently, more risk. Feedback is poor with these avalanche problem types (i.e. not many human or natural avalanches, hard to tease out trends, and spatially variable). So try utilizing time as a decision management tool. We can utilize it to create more options, reduce uncertainty, and optimize timing. If I notice my risk tolerance shifting with timing, I know it's time to take a step back. Comprehension does not always follow perception immediately, or at all; i.e. just because I see or know the problem is there, doesn't mean I fully get it. Utilizing time can help shift perception to better comprehension and knowledge. 

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