Avalanche Forecast
Regions: Cascades - South West.
Be aware of slightly greater avalanche danger in steeper terrain and near terrain traps relating to wet avalanches.
Detailed Forecast
Partly to mostly cloudy conditions Wednesday, with a chance of a few light showers and somewhat cooler temperatures, should not appreciably affect the current overall low avalanche danger.Â
Generally avoid steep slopes, especially near terrain traps where you might be able to push off enough wet snow to start an avalanche large enough to take you for a ride.
Remember, due to the unseasonably low snowpack especially at lower elevations, numerous terrain hazards such as open creeks, partially covered rocks and vegetation are widespread. Â
Snowpack Discussion
The most recent significant snow from one week ago was involved in generally small avalanches Friday and Friday night during periods of heavier rain. 48 hour storm totals through Sat AM for NWAC stations west of the crest were 1.5 to 3 inches of rain from Snoqualmie Pass and north and 0.25 - 1.5 inches south of Snoqualmie. Mt. Baker received the most precipitation and Crystal the least.
NWAC forecaster Dennis D'Amico saw evidence of a few loose wet slides on Monday on this SE aspect at about 6500 feet in the Paradise Glacier Valley, possibly triggered by small cornice drops as a result of Friday's most recent rain event. Photos: D D'Amico
High freezing levels along with plentiful sunshine were seen around the Northwest Sunday with slight cooling and clouds moving in Monday. The recent weather has caused significant settlement and melt of the snowpack with the upper portion consisting of wet grains that seem well drained. Â
The middle and lower snowpack consist of stable, rounded grains or melt forms and crusts from warm periods this winter.
Avalanche Problems
Loose Wet
Release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. They generally move slowly, but can contain enough mass to cause significant damage to trees, cars or buildings. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.
Travel when the snow surface is colder and stronger. Plan your trips to avoid crossing on or under very steep slopes in the afternoon. Move to colder, shadier slopes once the snow surface turns slushly. Avoid steep, sunlit slopes above terrain traps, cliffs areas and long sustained steep pitches.
Several loose wet avalanches, and lots of pinwheels and roller balls.
Loose wet avalanches occur where water is running through the snowpack, and release at or below the trigger point. Avoid terrain traps such as cliffs, gullies, or tree wells. Exit avalanche terrain when you see pinwheels, roller balls, a slushy surface, or during rain-on-snow events.
Elevations: Treeline, Below Treeline.
Likelihood: Unlikely
Expected Size: 1 - 1