Bollettino valanghe

Summit Lake

Chugach National Forest Avalanche Center
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Pericolo valanghe

Tue
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

Observers confirmed what weather stations were reporting yesterday: that it was windy. Although natural avalanches are not as likely today as they were yesterday, there are good chances a person could trigger an avalanche in windblown snow up to 2' deep above 2,500'.  The weak snow buried up to 4' deep in Summit Lake is more concerning than in other zones and there are still chances a person could trigger a large avalanche on on this layer above 2,500'. Choose low angle terrain below 2,500' to avoid these problems entirely.

Problemi valanghivi

  • Wind Slabs

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

    Recent Avalanches: Observers reported some avalanches they thought could be natural wind slabs yesterday, but it is very difficult to tell if this is the case or if these are older avalanches with partially filled in crowns. One of these occurred on Tenderfoot and the others were seen on a northwest aspect of Butch (observed from across the valley on Colorado). 

    Wind speeds yesterday and overnight in this zone were sustained between 10 to 30 mph on the ridgelines from variable directions with a gust to 49 mph on the Summit Peak Ridge station. Variable wind direction occurred yesterday making wind slabs possible on any aspect in any area that has no vegetation for protection. Blowing snow was deposited in many places on the slopes making it possible to find a wind slab much lower on the slope than you would expect. Wind slabs sometimes look like "pillows" of snow. They may be smooth or have some texture, but they are always more stiff than the snow beneath. Shooting cracks are the "red flag" that tells us the snow needs some time to stabilize.

    Dry Loose Avalanches: In wind sheltered places there is plenty of cold snow that could be entrained on steep slopes in a dry loose avalanche or sluff. This type of avalanche isn't usually dangerous unless it takes you off your feet and into a tree or off of a cliff.

    (2/15/2026)

    Fairly consistent moderate to intense snow transport off of the Tenderfoot and Tri-Tip ridgeline.

    Photo: Andy Moderow

  • Persistent Slabs

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

    We want to write off the December facets and forget about this persistent slab problem ever existed, but we can't do that yet. This problem is so challenging to assess and to trust and we are still getting unstable test results. The good news is that the stability on this layer has been trending in the right direction for a month and a half. The bad news is we still think there are still chances a person could find a thin spot and trigger a very large avalanche. This problem exists in the same place as the wind slab today so both can be avoided by choosing terrain in the treeline elevation band or below.

    (2/15/2026)

    Snowpack structure from 2,000' on  Colorado on an east aspect. 

    Photo: AAS Rec 1

Regioni coperte