Avalanche Forecast
Issued: Dec 10th, 2018 10:17AM
The alpine rating is , the treeline rating is , and the below treeline rating is
NWAC,
Northwest Avalanche Center
Cautious route finding and conservative decision-making are essential. You can trigger avalanches due to significant new snow and wind. Avalanche danger will increase in the afternoon and will be most elevated at upper elevations. Watch for signs of dangerous conditions such as recent avalanches, collapsing, or cracks in the snow.
Summary
Discussion
Avalanche Discussion
High uncertainty regarding current conditions exists for the Cascades-East-Central forecast zone. Avalanche danger ratings for this zone will be issued when more information is acquired.
Variable early season conditions exist. Avalanche Danger will change dramatically as you move through the mountains and as slabs build throughout the day. At lower elevations, well below treeline, shallow snow cover may make travel challenging, but may not pose significant hazard for avalanches. Near and above treeline natural and triggered avalanches are likely and could be big enough to kill you.
The main concern is avalanches due to new snow and wind. Underlying the new snow is a layer of weak facets and surface hoar. As new slabs build, it’s possible to trigger large and surprising avalanches. Watch for shooting cracks in the snow, collapses, or avalanches that break widely over terrain features. These are indicators that you should avoid avalanche terrain.
You can trigger avalanches where about 1 foot fresh snow accumulates. These avalanches will generally be soft and confined to steep slopes. At upper elevations and in wind-exposed terrain, you may find stiffer slabs that could break more widely. Use extra caution on slopes over 35 degrees and avoid deeper drifts of snow near and above treeline.
Snowpack Discussion
Regional Synopsis coming soon.
Valid until: Dec 11th, 2018 10:17AM
