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Avalanche Forecast

Archived

Feb 13th, 2025–Feb 14th, 2025

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

Regions

Lizard-Flathead, South Rockies, Flathead, Lizard, Bull, Elkford West.

Slightly warmer temperatures and new snow may increase the reactivity of persistent slabs

Avalanches are possible where the upper snowpack whumpfs, cracks or feels slabby under your feet

Confidence

Moderate

Avalanche Summary

On Wednesday no new avalanches were reported.

Rider triggering remains possible where a stiffer slab exists above the late January buried weak layers.

If you head into the backcountry consider submitting a MIN post!

Snowpack Summary

30 to 70 cm of faceted snow overlies a weak layer from late January. This layer consists of a crust on sun exposed slopes and a layer of surface hoar on all other aspects. Exposed terrain in the alpine and treeline is variably wind-affected creating a stiffer slab above the weak layer. In turn, the stiffer slab may be easier to trigger under the weight of a human.

The mid and lower snowpack is generally well settled.

Weather Summary

Thursday Night

Cloudy with isolated flurries. 10 km/h east ridgetop wind. Treeline temperature -12 °C.

Friday

Cloudy with new snow up to 5 cm. 10 to 20 km/h east ridgetop wind. Treeline temperature -7 °C.

Saturday

Cloudy with sunny periods. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -11 °C.

Sunday

Cloudy with flurries up to 5 cm. 10 km/h southwest ridgetop wind. Treeline temperature -9 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Pay attention to isolated wind affected features in the alpine, as well as cross-loaded features at treeline.
  • Approach steep and open slopes at and below treeline cautiously, as buried surface hoar may exist.
  • Be careful as you transition into wind-affected terrain.

Problems

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.