Lawinenlagebericht

Tetons

Bridger-Teton Avalanche Center
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Lawinengefahr

Hochgebirge
4 · Gross
Waldgrenze
5 · Sehr gross
Unterhalb
5 · Sehr gross
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Kernpunkte

VERY DANGEROUS AVALANCHE CONDITIONS EXIST AND ALL AVALANCHE TERRAIN SHOULD BE AVOIDED TODAY. As a warm and wet system brings increasing temperatures and constant snow and rain to the area today, the avalanche hazard will continue to rapidly increase. Snowfall at the higher elevations will continue to load existing wind slabs, making them both larger and increasing the likelyhood of them releasing naturally. At the mid and lower elevations, rain will quickly weaken the snowpack, allowing for wet slabs to occur. These avalanches will release naturally today and given the above average snowpack, are likely to entrain large volumes of snow. One such slide has already occurred this morning in the Snake River Canyon near Wolf Creek, closing Snake River Canyon. Teton Pass remains closed as WYDOT continues to clean up debris from several slides that occurred two days ago. Also of note is that two snowmobilers were both uninjured after being caught in a slide at Togwotee yesterday. One was fully buried with the exception of a visible part of his airbag that he had deployed. Beware of run out zones at lower elevations and use cautions around buildings as roofs will also be sliding. An avalanche warning has been issued by the center effective 1am this morning and continuing through at least 1am Friday.

Lawinenprobleme

  • Wind Slabs

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

    Very strong southwest to west winds over the past week have formed slabs and continue to load slabs in the backcountry. These slabs could release on density breaks throughout the storm cycle with depths of six inches to as much as four feet at the higher elevations. These slabs will be very sensitive to human triggers and are likely to release naturally today at the mid and high elevations and once triggered could run long distances and entrain the wet snow at the lower elevations. Continued snowfall and the rising snow/rain line will increase their likelyhood of failure today.

  • Wet Slabs

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

    The snowpack at the mid and low elevations will be quickly weakened by rain. Avalanche activity in the form of wet slab and wet loose is activity is certain.

Avalanche Discussion

Precipitation is to intensify this evening and continue through the night. Rain is expected at the Lower elevations. Temperatures are to cool Friday morning, and periods of snow are expected at all elevations through most of the day. The avalanche warning has been extend until 1am Saturday morning. The general avalanche hazard will be High to Extreme on Friday dependent on the moisture received by morning. If rain continues fall on slopes below 9000, natural avalanches will continue to impact roadways. Wet loose, and wet slab avalanches can all be triggered on lower slopes. Once moving they have the potential to entrain large volumes of snow. At higher elevations significant loading and wind has formed wind slabs in steep leeward terrain. These slabs could be triggered with depths of six inches to two feet may release naturally.

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