Bollettino valanghe

Seward and Lost Lake

Chugach National Forest Avalanche Center
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Pericolo valanghe

Sun
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
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Non aggiornato — questo bollettino è scaduto 6 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Dangerous avalanche conditions exist today after yesterdays storm brought 7" of new snow or more accompanied by strong easterly and southerly wind. It should be easy for a person to trigger an avalanche up to 2' deep in new and windblown snow above 1,000'. There is a smaller chance a person could trigger a much larger and more dangerous avalanche above 2,500' on weak snow buried up to 6' deep. We don't know exactly how sensitive either of these problems will be today, so the safest option is to give the snowpack time to adjust to the new load. Enjoy the soft new snow on low angle slopes without anything steep above.

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SPECIAL ANNOUNCEMENTS:

We’re excited to announce the annual Turnagain Pass Avalanche Awareness Day on Saturday, March 14! We will be up in the Turnagain Pass motorized lot from noon until 4 pm, along with AMDS, Anchorage Yamaha and Polaris, Anchorage Nordic Ski Patrol, Alaska Search and Rescue Dogs, and the Alaska Avalanche School. Stop by to demo a snowmachine, run through some avalanche rescue drills, or just grab a free burger or hot dog and chat with CNFAC forecasters about current avalanche conditions.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1.5–2.5

    Strong easterly winds occurred yesterday as 7" of new snow accumulated at both Grouse Creek (700') and Primrose (2,000') weather stations. Strong southerly wind is blowing this morning creating some fresh wind slabs to add to the mix. All of this wind and new snow, falling on weak old surfaces, should make it easy for a person to trigger an avalanche on any aspect up to 2' deep or more above 1,000'. Below 2,500' these avalanches may not be as big, but there are many places in the Lost Lake and Seward area where terrain traps exist and even a small avalanche can pile up deep. Clear signs of instability include recent avalanches, shooting cracks and hearing a whumpf. These are all signs that conditions are prime for a person to trigger an avalanche and the snow needs more time to stabilize.

    Storm Slab: Above 2,500' there may be places where 10 to 12" of new snow accumulated. If you find yourself in terrain with this amount of new snow, Storm Slab avalanches will be likely for a person to trigger. They should be on the small side, but watch for those terrain traps to ensure you don't end up in a place where snow can pile up.

    (3/6/2026)

    Light snow falling yesterday at Mile 12.

    Photo: Chugach National Forest Avalanche Center

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3

    This storm added a large amount of weight, especially in the alpine, where there was higher snowfall and strong wind. This is where the deep slab problem exists. Although the chances are low, it is not out of the question a person could trigger a very large avalanche up to 6' deep or more on a few different layers of weak snow including the December facets. There are much higher chances a person could trigger a smaller avalanche in the new and windblown snow described above. The weight of an avalanche failing within the new snow may be enough to trigger the December facets and it would be incredibly difficult to survive being caught in this type of avalanche. 

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