Bulletin d’avalanche

Summit Lake

Chugach National Forest Avalanche Center
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Danger d’avalanche

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

Points saillants

It is still unlikely that a person could trigger a large avalanche on weak snow near the ground in Summit Lake. This problem exists above 2,500' and is more easily triggered near thin spots in the snowpack near rocks or wind scoured areas. We can completely avoid this by sticking to slopes less than 30 degrees. 

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SPECIAL ANNOUNCEMENTS:

Avalanche Closure Notification for Wednesday February 26, 2025, Portage Glacier Highway MP 3-4: There will be intermittent traffic delays Wednesday February 26th, 2025, on the Portage Glacier Highway for Avalanche Hazard Reduction work. From mileposts 3 to milepost 4 on the Portage Glacier Highway, motorists should expect delays of up to 45 minutes between 09:00 AM and 11:00 AM. Updates will be posted on the 511 system. http://511.alaska.gov

Free avalanche outreach events this week on the Kenai Peninsula!

  • Today, Wednesday, Feb. 26 at the Kenai River Brewery in Soldotna from 6:00 to 7:00 pm - Join forecaster Daniel Krueger to talk about the state of the snowpacks and useful backcountry tips and tricks. More info here.
  • Tomorrow, Thursday, Feb. 27 at the Breeze Inn Hotel in Seward from 6:00 to 7:30 pm. Join forecaster Mik Dalpes to talk about the state of the snowpacks, mapping resources, and how to interpret stability tests. More info here.

Problèmes avalancheux

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    2–3

    Yesterday we investigated the large avalanche on John Mountain and found it to be old (likely released during the last big storm at the end of January), which is good news. A little bit of rain falling on the debris last week made it look crisp and new vs. old news. The last avalanche we are aware of in Summit Lake was on Butch Mountain, which released sometime last week, and was a slab likely triggered by cornice fall. There has only been 1" of snow in the Summit area in the last month. All of this information points to stabilizing conditions, yet we are still wary of this snowpack because of it's poor structure (weak layers under large slab). This is influencing our terrain choices and Andrew does a great job of describing this in his video. If a person were to find just the right spot to trigger one of these avalanches it could be huge. If you are getting into steeper terrain consider choosing slopes with benches and places with lower angles instead of big open slopes with sustained steep slope angle. 

    Glide Avalanches: Glide avalanches are still releasing occasionally and are large and powerful. Try not to get sucked into a route that leads underneath if possible and make a plan that avoids them completely as they can release anytime.

Régions couvertes