
Date Issued
Feb 12, 2026, 12 AM
Valid Until
Feb 13, 2026, 12 AM
Keep the persistent slab problem on your mind at treeline and below.
Shooting cracks and "whumphing" are red flags that human triggering remains possible.
Alpine
Treeline
Below Treeline
Moderate
Moderate
Moderate
Alpine
Treeline
Below Treeline
Moderate
Moderate
Moderate
- Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
- Keep in mind a buried crust offers an excellent bed surface for avalanches.
- Approach steep and open slopes at and below treeline cautiously, as buried surface hoar may exist.
- Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.
A few natural avalanches, size 1 to 1.5, have been observed along the highway corridor recently.
Field teams on Tuesday were triggering small, loose dry avalanches in low density storm snow in steep terrain. These avalanches were failing on the crust.
Also on Tuesday, see the public report of human triggered avalanches, size 1.5.
20-30cm of low density storm snow has formed slabs on lee features at ridge top.
There are a series of crusts in the upper snowpack from solar warming and above freezing temperatures in the past 2 weeks.
30-60cm beneath the surface is the Jan 26th drought layer which consists of surface hoar, facets, and a crust. This layer is widespread with largest surface hoar in sheltered areas at treeline and below.
The mid and lower snowpack is generally well settled and strong.
- We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.