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Avalanche Forecast

Archived

Feb 12th, 2026–Feb 13th, 2026

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.

Regions

Glacier.

Incoming new snow will continue to build windslabs, as well as increase the size of loose snow avalanches.

Keep the persistent slab problem on your mind at treeline and below - be especially cautious if you are exploring areas that don't see regular traffic.

Confidence

Moderate

  • We are confident that there are persistent slabs in the snowpack, but uncertain about how likely they are to trigger.

Avalanche Summary

A limited round of avalanche control Thursday produced loose snow avalanches up to size 2.5 in steep rocky terrain.

A few natural loose snow avalanches, size 1 to 1.5, have been observed in the highway corridor recently.

There were MIN reports on Wednesday of triggering the persistent week layer in the Ross Pillows, as well as thin slabs on the Asulkan glacier.

Field teams Tuesday were triggering loose snow avalanches in steep terrain, failing on a recently buried crust.

Snowpack Summary

20-30cm of low density snow fell recently, and has formed windslabs on lee features at ridge top.

There are several crusts in the upper snowpack, from solar warming and above freezing temps 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 the largest surface hoar in sheltered areas at treeline and below.

The mid and lower snowpack is generally well settled/strong.

Weather Summary

A weak Aleutian low pushes the high pressure out, giving cloudy skies and light flurries.

Tonight: Cloudy. Alpine low -7°C. Ridgetop Wind Light Southwest.

Fri: Flurries (5 cm). Alpine High -7°C. Freezing level (FZL) valley bottom. Ridgetop winds Light gusting strong SW.

Sat: Flurries (10-15cm). Low -9 °C, High -7 °C. Gusty moderate SW wind.

Sun: Sunny periods. Low -11 °C, High -9 °C. Light SW wind.

Terrain and Travel Advice

  • Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.
  • 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.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.

Problems

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.