Avalanche Forecast

Moderate - Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack.

MONDAY NIGHT - Cold and cloudy with isolated flurries, trace to 5 cm / moderate northeast wind / alpine low temperature near -30

TUESDAY - Mostly sunny / moderate southeast wind / alpine high temperature near -24

WEDNESDAY - Sunny / moderate increasing to strong east wind / alpine high temperature near -24

THURSDAY - Sunny / strong east wind / alpine high temperature near -24

Evidence of recent natural wind slab avalanches (likely occurring Saturday) were observed on Sunday as discussed in this MIN report. Small loose dry avalanches were also reported, in some cases likely triggered by the sun.

As the recent low-density storm snow becomes more consolidated and forms a slab, the likelihood of avalanches may increase.

Cold temperatures are encouraging surface faceting and variable winds are impacting loose snow. The late January interface is down 20-30 cm, consisting of isolated surface hoar in sheltered locations, and previous wind effect in exposed areas. On solar aspects, a buried sun crust can be found below 1000 m. 

The lower snowpack has two decomposing crust layers. The upper crust is 70-140 cm deep and continues to show occasional hard, sudden results in snow pits. The deeper crust at the bottom of the snowpack is more prevalent in shallow snowpack ranges. These deep persistent layers seem to be dormant under the current conditions, but shallow rocky slopes should still be carefully assessed and approached with caution. 

• Potential for wide propagation exists, fresh slabs may rest on surface hoar, facets and/or crust.
• Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
• Watch your sluff: it may run faster and further than you expect.