Lawinenlagebericht

Salt River and Wyoming Ranges

Bridger-Teton Avalanche Center
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Lawinengefahr

Sun
Hochgebirge
2 · Mässig
Waldgrenze
1 · Gering
Unterhalb
1 · Gering
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Kernpunkte

Overnight winds and new snowfall will make human-triggered wind slab avalanches possible at upper elevations. Avalanches will most likely occur on steep slopes where you encounter obvious signs of wind-drifted snow. Watch for active wind loading, drifts, and shooting cracks. Evaluate exposed terrain carefully and consider the consequences of getting knocked off your feet. 

 

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2

    Overnight, the Greys River forecast zone received 1-3" of new snow with predominately western winds of 20-30 mph. The combination of wind and snow has formed fresh slabs up to a foot thick. Slabs currently exist in isolated areas of exposed terrain at upper elevations. Expect additional loading through the day as snowfall and western winds continue. Wind slabs often form along ridgelines, below convexities, and on cross-loaded terrain features, such as gullies and couloirs. Watch for active drifting, pillows, and textured or stiffer snow surfaces. Shooting cracks means you've found unstable snow. If you see signs of instability, move to lower-angled slopes or wind-sheltered terrain. 

    (3/28/2024)

    Signs and snow features to look for when identifying wind loaded terrain

    Photo: Alex Drinkard

Avalanche Discussion

Conditions can change quickly during the spring. Yesterday's warm weather has been replaced by winter.  Today, cooler temperatures, increasing winds, and clouds should keep wet avalanche problems in check. Overnight snowfall has impacted the forecast zones bringing light, low-density snowfall to the Greys. With sustained winds through the day, this snow will be tossed around and create fresh wind slabs in isolated areas. Snowfall and winds are expected to continue through the day, so slab size and distribution could increase as the day progresses. This will be especially true in the late afternoon as a second band of moisture and stronger winds impact the zone. It will be hard to predict how this new snow will bond to our snowpack. If it behaves anything like the previous storm (where we saw similar conditions and setup) small slabs could be fairly easy to trigger. Enjoy the fresh snow and watch for the hard crusts that are hidden underneath. 

Help us improve avalanche forecasts! CLICK HERE to take an avalanche forecast survey and be entered into a prize drawing. The Colorado Avalanche Information Center, the Avalanche Research Program at Simon Fraser University, and the U.S. National Science Foundation National Center for Atmospheric Research are researching how skiers, snowmobilers, snowshoers, ice climbers, and anyone else who travels in the backcountry interpret avalanche forecast information. Part of this research includes a specific survey to better understand how useful avalanche forecast information is for trip planning. 

Completing this survey will take approximately 20 minutes. Thank you for sharing your feedback to help us improve avalanche hazard communication. 

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