Bulletin d’avalanche

Galena Summit & Eastern Mtns

Sawtooth Avalanche Center
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Danger d’avalanche

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

Points saillants

Triggering a very large avalanche is possible. Triggering these avalanches is most likely in wind loaded locations. These may be triggered by smaller avalanches, and where the slab is thinner.

Problèmes avalancheux

  • Persistent Slabs

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

    Triggering a very large Persistent Slab avalanche is possible. Here’s what we know:

    • You're most likely to trigger one of these slides in steep terrain facing W-NW-N-NE-SE terrain
    • Yesterday, skiers remotely triggered two persistent slab avalanches, and we received more observations of booming collapses
    • Persistent Slabs can release in surprising ways, break wider than expected, and may be triggered remotely (above or to the side and hundreds of feet away from where they are triggered)
    • You may not receive any obvious warning signs before triggering one of these avalanches

    Additional Discussion: You may be able to trigger smaller avalanches involving only wind-drifted snow from the tail end of the storm (Wind Slabs). The biggest hazards these soft and hard slabs pose are 1) carrying you where you don't want to go and 2) triggering the much larger Persistent Slabs discussed above as the slides move downslope. Avoid large or consequential avalanche paths where the wind formed large or stiff drifts or slabs.

    (2/8/2025) This large avalanche was spotted by an observer on the west side of Gladiator Peak (W-NW aspects near 9000') on Saturday. The crown is approximately 1500 feet wide.  

Avalanche Discussion

Today marks the third day of pleasant weather after a week of near constant storms. If you're aiming for a three-peat of bluebird powder today, don't let complacency from a lack of obvious sings of instability over the past couple of days mislead you (like it did the Chiefs in their dream of a Superbowl three-peat last night). Yesterday, skiers remotely-triggered avalanches near Galena Summit and in Lake Creek while skiing low-angle terrain next to steeper slopes. We also received a report of a recent large avalanche in the Mt. Baldy backcountry that appears to be remotely-triggered by skiers. We continue to receive reports of booming collapses from around the forecast area.  All this points towards a complex and unstable snowpack that needs more time to heal. We're only a few days out from the largest loading event of the winter, and it's easy to forget about the lingering weak snow buried below.

The Considerable hazard extending into middle elevations in the Galena Summit and Eastern Mountains zone is due to both the relatively thinner weaker pre-storm snowpack and the higher elevations covered in the zone.

Be on the lookout for small natural and easily triggerable loose snow avalanches if the skies remain clear and winds are calm today. These will primarily be found in steep solar slopes and can occur near the base of rock outcrops where additional warming occurs.

Régions couvertes