Bulletin d’avalanche

Seward and Lost Lake

Chugach National Forest Avalanche Center
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Danger d’avalanche

Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 2 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

It is finally looking like we may get some relief from the northwest winds that we've been seeing all week in the Seward area, but we are still concerned with the possibility of triggering an avalanche 1 to 2' deep or deeper where the winds have blown snow into reactive slabs. These will be most likely in steep terrain below ridgetops, convex rollovers, and in loaded gullies. Look for better stability and surface conditions in terrain that has remained sheltered from recent winds, still holding soft snow on the surface.

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SPECIAL ANNOUNCEMENTS:

The Avalanche Rescue Workshop at Glen Alps has been POSTPONED to Sunday, February 9th.  The workshop is 100% free of charge and all experience levels are welcome. Click HERE for more information.

We're on a brewery tour next week! Come out for two free evenings of conversations about the world of snow and avalanches:

  • State of the Snowpack talk - Tuesday, February 4th, 6-7pm at Onsight Brewing in Anchorage. Join Dr. John Sykes and Mary Gianotti for a night of snowpack discussion at a new venue! More details HERE. 
  • Forecaster Chat - Thursday, February 6th, 6-7:30 p.m. at Girdwood Brewing Co. in Girdwood. Andrew Schauer will discuss recent CNFAC research and highlight ways it can help your backcountry game. Details HERE.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2.5

    Our main concern in the Seward zone is the same type of avalanches we saw in Turnagain Pass yesterday - wind slabs that have formed over the past two days that are around 1 to 2 feet deep. Seward has experienced the strongest winds during this outflow event, which makes avalanches more likely and potentially much bigger. As the winds start to calm down the likelihood of natural activity is decreasing, but there is still a good chance a person will be able to trigger an avalanche today.

    You can manage this problem by avoiding wind-loaded terrain and looking for stable snow and better surface conditions in terrain that has been sheltered from recent winds. Be wary of any slopes with stiff or punchy snow on the surface, especially if you notice any shooting cracks or collapsing. The most likely places to run into trouble will be in steep upper-elevation terrain just below ridgelines, convex rolls, or in loaded gullies. As the quiet weather makes it easier to pursue bigger objectives, keep in mind even a small avalanche can have severe consequences in steep terrain.

    Cornices: Last weekend's storm was followed by northwesterly winds over the week, building large cornices on many aspects. These often catch people by surprise, breaking back much further from the edge than we'd expect. Keep that in mind if you are traveling along ridgelines, and be sure to limit spending time under them since they can release naturally.

    (1/30/2025)

    Wind damage near Lost Lake. Those loaded gullies are one kind of terrain feature where you might be able to trigger an avalanche today.

    Photo: Daniel Krueger

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