Lawinenlagebericht

Tetons

Bridger-Teton Avalanche Center
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Lawinengefahr

Hochgebirge
4 · Gross
Waldgrenze
4 · Gross
Unterhalb
2 · Mässig
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Kernpunkte

Dangerous avalanche conditions exist, and TRAVEL IN AVALANCHE TERRAIN IS NOT RECOMMENDED. The Bridger-Teton Avalanche Center has issued an Avalanche Warning through 6 PM tonight, and the National Weather Service has issued a Winter Storm Warning through 5 PM. Yesterday, a skier died in an avalanche to the south of the Jackson Hole Mountain Resort. The Wyoming Department of Transportation fired the GazEx’s on Teton Pass, which resulted in a large slide out of Glory Bowl that has impacted the road. This slide and the potential for more activity will keep Teton Pass closed for most of the day. Temperatures are starting out around 10 degrees warmer than yesterday morning. Both natural and human triggered avalanches involving the recent snowfall will be very likely today. The loading event over the last several days will also increase the likelihood of triggering large to very large, persistent deep slab avalanches. These destructive avalanches could also release naturally.

Lawinenprobleme

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    2–3

    Dangerous persistent deep slabs reside over faceted snow from December and January. Since Wednesday afternoon, 2.5 to 3.5 inches of snow water equivalent has been added to the snowpack, and new snow will continue to accumulate through the day. This increasing load, which could produce natural activity, will continue to raise the likelihood of triggering persistent deep slab avalanches that could range in depth from three to six feet. These avalanches could also be triggered by the release of a wind slab and have the potential to run into lower elevation terrain.

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Very Likely
    Größe
    2

    Warmer temperatures and strong southwesterly to westerly winds have created upside-down conditions, and skiers and riders are very likely to trigger wind slabs up to three feet deep on steep, wind-loaded slopes. As the day progresses, the likelihood of triggering these slabs will be on the increase. These slabs are also likely to release naturally.

Avalanche Discussion

Periods of light snowfall may continue overnight and into Monday. Colder air will move into the region. Winds will veer to the west and decrease to 5 to 15 miles per hour.The avalanche warning issued by the Bridger-Teton National Forest Avalanche Center will expire at 6 PM this evening. The general avalanche hazard is expected to be CONSIDERABLE above an elevation of 7,500 feet and LOW below that elevation. At the mid and upper elevations dense winds slab up to two feet in depth could be human triggered in steep avalanche starting zones and cliff areas. Dangerous persistent slabs up to five feet in depth could also be triggered by snowmobilers and skiers on deeply buried layers of weak, faceted snow that formed in December and mid-January. Avalanches are unlikely at the lower elevations.

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