Lawinenlagebericht

Presidential Range

Mount Washington Avalanche Center
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Lawinengefahr

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

Kernpunkte

Warm temperatures and rain make wet snow avalanches possible today. If the snow surface turns to wet mush on steep slopes, head for gentler terrain. Avalanches large enough to bury a person are unlikely, though the unpredictable nature of wet snow should inspire caution around the larger drifts of snow.

Lawinenprobleme

  • Loose Wet

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

    Loose wet avalanches will start at a point (often your feet) and fan out to collect snow as they travel downhill. They will most likely occur in pockets of previously softer snow, although they can happen anywhere as hours of above freezing temperatures melt existing surface crusts. Most will be less than a foot thick, but are deceptively powerful. They are incredibly difficult to escape once they grab ahold of your skis and can easily carry you where you don't want to go. If the snow surface feels like a loose slurry of snow and water, move to lower angle slopes to minimize this hazard. 

  • Wet Slabs

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

    Wet slab avalanches are much less likely to occur than Wet Loose avalanches today, although they bring greater consequences being a much larger mass of snow. Identify the larger pockets of drifted snow, generally found in steep east facing terrain, and understand that water and warm temperatures will work to destabilize these slabs. Wet slabs are destructive and unpredictable. Pay attention to the terrain above you in your travels, and do not linger below very steep slopes longer than needed; wet avalanches can release on their own. 

Avalanche Discussion

Weird weather brings weird avalanches. With temperatures well above freezing at all elevations and ½ inch of precipitation, mostly as rain, Loose Wet avalanches are to be expected, especially on steep slopes. The larger concern is for a destructive Wet Slab avalanche. Forecasters this morning were in agreement that the existing slabs were generally showing good stability going into this warming event, including the larger slabs in east facing ravines. Given the unpredictable nature of water moving through the snowpack, we can’t rule out this avalanche problem. 

Later this evening, watch out for wind slabs developing on east and south east aspects once mixed precipitation turns back to snow. With 1-3 inches of snow possible, these wind slabs could easily be over a foot thick at the higher end of expected snow totals. 

 

The Lion Head Summer Trail is CLOSED due to increased avalanche hazard. The Lion Head Winter Route is OPEN and the most direct route to the Mount Washington Summit from Pinkham Notch. 

OBSERVATIONS: Please consider submitting an observation of what you are seeing in your travels. Submitting an observation hones your skills, informs other users, and improves our forecasts.

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