Wind Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
Avalanches are most likely at upper elevations and on leeward slopes where you find recent wind-loading. Wind-stiffened slabs will be limited to immediately below ridges. Winds have, and may continue to, transport snow from both east and westerly directions. Watch for "red-flag" signs of instability, such as recent avalanches, blowing snow, and cracks shooting through the snow. Steer around cornices and wind-loaded pillows on slopes steeper than 35 degrees.
While triggering avalanches on wind-sheltered slopes is unlikely, our confidence is still very low. Approach any terrain with an assessment mindset. Make frequent observations and choose conservative terrain. Daytime warming could make the snow more cohesive. If it slides easily, especially on a crust, consider this another "red flag" sign. We expect another 3" of snow with enough wind to drift snow at upper elevations.
(12/22/2025)
A natural slab avalanche likely occurred on 12/21 in wind-drifted snow. Size D2. White Pine Cirque, NNE, 6,750ft. SS-N-R1-D2-S
Photo: Josh Hirshberg