
Date Issued
Feb 23, 2026, 12 AM
Valid Until
Feb 24, 2026, 12 AM
Wind slab hazard is building at upper elevations and a persistent weak layer lurks down low.
Human and remote triggering of the persistent slab is still possible.
Alpine
Treeline
Below Treeline
Considerable
Considerable
Considerable
Alpine
Treeline
Below Treeline
Considerable
Considerable
Considerable
- Surface hoar distribution is highly variable. Avoid generalizing your observations.
- If triggered, wind slabs may step down to deeper layers, causing larger avalanches.
- Be alert to conditions that change with elevation, aspect, and exposure to wind.
Human triggered wind slab and persistent slab avalanches have been reported on the MIN.
Field teams have triggered numerous size 1 to 2 persistent slabs from low angle terrain at tree-line and below. These have been 40-60cm deep, failing on surface hoar layers in the upper snowpack.
The surface has up to 60cm of low density snow in sheltered areas with wind slab development in exposed terrain.
The Feb 9 surface hoar (SH) is down 50-80cm and remains reactive in snowpack testing. The Feb 9 SH sits over a crust on solar aspects.
The Jan 26th layer, composed of surface hoar/facets/crust, is buried down 60-80cm. The largest surface hoar is preserved in sheltered areas below treeline.
- We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.