Lawinenlagebericht

Mt Hood

Northwest Avalanche Center
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Lawinengefahr

Thu
Hochgebirge
2 · Mässig
Waldgrenze
3 · Erheblich
Unterhalb
3 · Erheblich
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Veraltet — dieser Lagebericht ist 5 years ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Sunshine and rapidly rising temperatures will weaken the surface snow and increase the likelihood that you can trigger a wet loose avalanche on sun-exposed slopes steeper than 35 degrees. Use caution on slopes receiving direct sunshine where you find wet snow surfaces. 

Lawinenprobleme

  • Loose Wet

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

    Fresh snow deposited Sunday and Monday will react quickly to Wednesday's sunshine. Most areas stayed cool as clouds developed Tuesday preventing a significant warm-up.  Therefore, the recent storm snow retains the potential for wet loose avalanches to occur on steep sunny slopes.  Wet loose avalanches may release naturally below steep rock faces that catch the sun.  If you see pinwheels or rollerballs,  or find yourself sinking into wet surface snow more than ankle deep,  choose slopes less than 35 degrees or seek shadier terrain. Trees beginning to shed snow or drip water are a clear sign that wet loose avalanches can be triggered.

    (3/27/2021) An example of a classic wet loose avalanche in the Mt. Baker Backcountry. Photo: Zack McGill

Avalanche Discussion

Sunday night's storm brought 6-12" of new snow that is generally well bonded to the melt-freeze crust from the weekend. Very little avalanche activity was observed Monday and Tuesday. Upper elevation winds reached almost 100mph Sunday evening and likely scoured or compacted the snow in many typical start zones.

The wind-compacted snow at upper elevations will be slower to become unstable in the sunshine and is dense enough that it is unlikely to produce a wind slab. 

Any remaining wind slabs are likely to be small. They will be most likely below cornices and on steep midslope features, possibly in unusual locations due to the strength of the wind. Look for shooting cracks and pillow-like drifts as signs that you could potentially trigger a lingering wind slab. Navigate around these wind loaded features to avoid triggering a wind slab.

During the ongoing Covid-19 pandemic, continue to follow the latest guidance from local, state, and federal health officials. Avoid unnecessary risks that could impact first responders and stress medical resources.  Wear a mask when appropriate, practice social distancing, and consider recreating closer to home.

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