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Avalanche Forecast

Archived

Feb 12th, 2025–Feb 13th, 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.

Human triggered avalanches are possible where the upper snowpack feels "stiff and slabby"Continuously assess conditions as you move through the terrain

Confidence

Moderate

Avalanche Summary

Several dry loose avalanches were seen from steep south facing terrain. 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

50 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. In sheltered terrain, a layer of surface hoar may be found just below the surface.

The mid and lower snowpack is generally well settled.

Check out this MIN report posted today. Big thanks to everyone reporting to the MIN!

Weather Summary

Wednesday Night

Clear periods. 15 km/h northwest ridgetop wind. Treeline temperature -18 °C.

Thursday

A mix of sun and cloud with a trace of new snow. 10 to 20 km/h northeast ridgetop wind. Treeline temperature -11 °C.

Friday

A mix of sun and cloud with isolated flurries. 10 to 20 km/h east ridgetop wind. Treeline temperature -16 °C.

Saturday

Cloudy with new snow up to 5 cm. 10 km/h southwest ridgetop wind. Treeline temperature -11 °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.