Bollettino valanghe

Summit Lake

Chugach National Forest Avalanche Center
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Pericolo valanghe

Mon
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
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In sintesi

Triggering a small to large wind slab avalanche is likely in the Summit area. Very strong winds since yesterday and a few inches of snow today will keep wind slabs the main concern. These could release natually, be up to 2 feet deep, and propagate across slopes. Additionally, a wind slab could trigger a much larger avalanche on a deeper weak layer in the snowpack. Glide avalanches continue to release. To avoid avalanche issues altogether and get out during the storm, stick to low angle slopes with nothing steeper above you.

MONDAY'S AVALANCHE OUTLOOK - There will be no avalanche forecast tomorrow. The storm over the region today looks to move out Monday morning decreasing the chances of natural avalanches. However, it will still be dangerous on Monday as human triggered avalanches will still be likely. A conservative mindset is recommended as there are a lot of unknowns with the snowpack at the moment. 

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SPECIAL ANNOUNCEMENTS:

End of Season Operations: Starting tomorrow we will transition to our late season schedule. We will issue avalanche forecasts on Tuesday, Thursday, Saturday and Sunday for the second half of April. We will issue our final forecast of the season on Sunday, April 27.

If you have been traveling in avalanche terrain for at least one season and want to help avalanche researchers develop new tools to assist individuals with managing risk in avalanche terrain, check out this 1-2 minute survey. Participants will be entered to win prizes from Jones Snowboards, BCA, and more!

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    1–2

    A powerful storm moved in yesterday and will continue to impact the region today and should exit quickly tomorrow morning. Very stong easterly winds have been ravaging the hills. Anywhere from 4-6" of snow could fall in the Summit area today although, warming temperatures could raise the rain line as high as 1,500'. That said there will be wet snow avalanche issues in the lower elevations and dry snow avalanche issues in the mid and higher elevations. 

    Wind Slabs... With so much wind and not a lot of new snow it will be those slopes with wind drifted snow piling up that could release naturally or be easily triggered by a person. What often happens in weather like this is a chunk of cornice can break off and trigger a wind slab below. Watch for any area that snow is collecting, just below ridgelines, cross loaded gullies and under rollovers. 

    Cornices have been reaching their breaking point and should continue to fail through this storm. They will be quite sensitive after the storm so be extra careful on Monday if skies clear enough for travel along ridgelines. 

  • Persistent Slabs

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

    The surface hoar that was buried on Valentine's Day is now up to 2' deep in Summit Lake. It appears to mostly exist in specific places between 2,000' and 3,500' in wind sheltered areas. We haven't seen an avalanche on this layer since March 3rd, but its behavior in Turnagain Pass makes us wary to trust it. Wind loaded slopes by this storm could overload the layer and once skis break we'll be looking for evidince of slabs breaking into it. Until then be extra cautious on steeper slopes that could look inviting. 

    (3/31/2025)

    Buried surface hoar found 1' below the surface above 2,000' on Tenderfoot 2 weeks ago.

    Photo: Mik Dalpes

  • Glide Cracks

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

    Glide avalanches continue to release across our forecast zones as the snowpack becomes weak as it melts. These avalanches are running into the treeline elevation band, so places that have been relatively safe this year may not be, as we go forward with the spring shed cycle. 

    Wet avalanches may not be as much of an issue in Summit as Summit sits a bit higher in elevation. However, in the case rain does fall on snow in areas with slopes that could avalanche then wet avalanches in form of wet loose or wet slab could occur. 

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