Wind Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 1–2
In terrain exposed to the wind, snow has been blown into dense drifts or slabs of snow that will likely remain sensitive today. Large avalanches could be triggered in exposed terrain at mid and upper elevations. These avalanches will run fast and far where the bed surface is a firm crust. Look for clues to wind loading such as a rippled or stiff snow surface, cracking around your skis or under your machine, and fresh cornice development along ridgelines. Use small test slopes with little consequence to test the reactivity of fresh wind slabs.
In wind-sheltered areas, storm slabs are likely to be less sensitive than wind slabs today, but you should remain vigilant. Yesterday, during the peak intensity of the precipitation during mid-day, storm slabs were easily intentionally triggered in any terrain over 30 degrees. See photos below.
(3/12/2025)
Rippled snow texture was a good telltale sign of recent wind loading.
Photo: Caleb Merrill