Lawinenlagebericht

Tetons

Bridger-Teton Avalanche Center
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Lawinengefahr

Wed
Hochgebirge
3 · Erheblich
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Veraltet — dieser Lagebericht ist 3 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

The avalanche danger will rise to Considerable today as new snow falls at intense rates in the afternoon. Avalanches will be most likely on upper-elevation slopes—especially those that are getting drifted by today's wind. Triggering a smaller avalanche is also possible on steep slopes in sheltered terrain. 

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–1.5

    Expect to find touchy conditions today on many aspects. Snowfall rates this afternoon may approach 1 inch an hour with strong winds, and impact the west Tetons earlier. Prior to today, we've accumulated some light, dry snow. Today's snowfall will likely be touchy on this interface alone. You are most likely to encounter problems at upper elevations where snow totals are greater, and wind speeds are higher. Monitor changes in snow conditions throughout the day, and watch for signs of cracking and collapsing. How weather pans out today and into tomorrow will load a significant slab likely sitting on a very weak surface.

    Today will be a good day to start ratcheting back your terrain choices. I'd avoid any steep upper-elevation slope with evidence of wind effect. Late today, triggering avalanches on steep, wind-sheltered slopes may also become a real possibility.

    (1/8/2024)

    On wind-exposed steep rollovers, we could trigger small patches of new snowfall starting to form slabs atop buried surface hoar around 1.5 feet deep. These areas were easy to trigger and will increase in size an extent over the next several days.

    Photo: Gabrielle Antonioli

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely
    Größe
    1–1.5

    Weak snow formed during November now sits ~2-3 feet below the surface and has proven to be mainly dormant. While unlikely, these avalanches cannot be ruled out in steep, north-facing terrain at the upper elevations. As of now, persistent slab avalanches are not of primary concern. However, this will likely change as we add additional load to the snowpack.

Avalanche Discussion

Drip. Drip. Drip. A trickle of loading from snowfall and, more recently, wind, has slowly been loading very weak snow. Later today, this trickle will become a full-on faucet. Prior to last week, we had a faceted snow surface that was fairly uniform across the forecast area. This uniformity is beginning to break down as different portions of this forecast area have received vastly different snow amounts and are about to get loaded at varying rates today. While we're only talking about differences in inches of snowfall here, that can make all the difference currently. This is particularly true where the storm's timing will determine the hazard.  No matter how you cut it, expect rapidly changing snow conditions today.   

Isolated terrain features below 7,500' have accumulated enough snow to warrant a danger rating. In those locations, the avalanche danger today will remain low.

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