Avalanche Forecast

Moderate - Uncertainty is due to the limited number of field observations.

SUNDAY NIGHT: Mostly cloudy with isolated flurries; 3-5 cm / Strong southeast wind / Low of -22

MONDAY: Mix of sun and cloud with isolated flurries; 0-5 cm / Moderate southeast wind / High of -20

TUESDAY: Sunny / Moderate southeast wind / High of -24

WEDNESDAY: Sunny / Light variable wind / High of -26

Several naturally triggered storm slab avalanches up to size 1.5 were reported on Saturday. The freshly formed slabs may remain reactive for longer than is typical because they are sitting on weak facets (sugary snow).

If you are out in the mountains, let us know what you see by filling out a Mountain Information Network report! ?

20-60 cm of recent snow and strong winds from a variety of directions have formed reactive wind slabs at treeline and above. The freshly formed slabs may remain reactive for longer than is typical because they are sitting on weak facets (sugary snow).

In open areas, this new snow is sitting on a heavily wind effected surface, comprised of old harder wind slabs, sastrugi, and areas stripped back to the ground or early season crusts. In sheltered areas, the new snow overlies up to 30 cm of low density, faceted snow from two weeks of prolonged cold temperatures. 

The mid pack is well settled. An early season crust exists near the base of the snowpack. Faceting has been observed around this crust, with no recent avalanche or snowpack test reactivity. Snowpack depth at treeline ranges from 150-230 cm, with highest values in the western part of the forecast region. 

• Be aware of highly variable recent wind loading patterns.
• Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
• Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
• Keep your guard up at lower elevations. Wind slab formation has been extensive.