Avalanche forecast

Tetons

Bridger-Teton Avalanche Center
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Avalanche danger

Fri
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate
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Out of date — this forecast expired 3 years ago. You’re viewing past conditions, not the current bulletin.

Highlights

Dangerous avalanche conditions will continue today above 7500’. Recent snow sits above a very weak layer where large avalanches could be triggered remotely from gentle slopes above, below, or to the side of steep terrain. Due to the unpredictable nature of these avalanches, cautious route-finding to avoid steep slopes will be necessary. 

Multiple avalanches were reported yesterday. Click here to view all the observations in the Tetons highlighting unstable snow .

Avalanche problems

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Likely
    Size
    1.5–3

    Historically dry conditions in December formed a widespread weak layer across all elevations and most aspects that is now buried 1-2.5 feet below the snow surface. The slab quality of recent snow above this weak layer is primed for avalanches with its upside down character due to increased temperatures and wind during active loading. Numerous avalanches were reported yesterday. Triggering a large avalanche on this weak layer will remain likely today in middle and upper elevations. These avalanches can be triggered remotely and on unsuspecting treed slopes. Don't let this catch you off guard. Areas with the highest likelihood of triggering will be on wind loaded slopes where slab depths could be closer to 3 feet. Look for obvious signs of instability such as cracking and collapsing as these are clear indications of unstable snow. 

    Deeper weak layers formed in November are buried around 3 feet or deeper below hard slabs. The potential for avalanches triggered on the weak layer mentioned above could step down to these deeper layers causing an even larger, destructive avalanche. 

    (1/10/2024) 

    This avalanche reported yesterday highlights the unpredictable nature failing even on treed slopes at 7500'. 

Avalanche Discussion

A Deadly Recipe

Today we are transitioning from a wind slab to persistent slab problem. Wind slabs will still be out there, but they will fail on the 1/4 persistent weak layer.  This weak layer consists of well developed facets and surface hoar. The character of this weak layer combined with a firm, cohesive slab has created a deadly recipe for avalanches. Everyone (including myself) has been waiting patiently for the snow to fall. We have all been longing for some good powder riding. Don’t let this desire inhibit your decision making today. There are plenty of clear indications that the recent snow is very unstable. Today is a great day to enjoy that deep powder in lower angle terrain and don’t let that powder brain lure you into those steeper slopes.

Thank you to everyone who submitted observations yesterday. 

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