Storm Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 1.5–2.5
Recent Avalanches: A small wet loose avalanche was noted on April 4 on The Ramp on a SE-facing aspect. In addition, a small human-triggered avalanche was triggered on April 9 on a NW aspected that was suspected to have failed on the upper near-surface facet layer we have been tracking.
Over 6" of new snow is expected to fall on Sunday, forming fresh storm slabs on top of a variety of old snow surfaces. These slabs will be most reactive on steep slopes, especially where new snow accumulates unevenly or is slightly wind affected. Human-triggered avalanches will be possible during and shortly after the storm, particularly in alpine and mid-elevation terrain. Watch for signs of instability such as cracking in the new snow or recent avalanches, and use caution on slopes steeper than 30°.
Persistent Slabs: Several weak, faceted layers remain in the snowpack, though the upper layer is starting to heal with recent warming. Triggering is unlikely but not out of the question, and avalanches could break 1’–3’ deep—avoid steep, previously wind-loaded slopes and choose terrain carefully.
(4/11/26)
Up to 0.5" of new water is expected in the forecast on Sunday
Photo: NWS