Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Regions
Northwest Coastal.
Forecast precipitation amounts and freezing levels are uncertain for Monday. If precipitation amounts are higher locally than forecast, avalanche danger may be higher than indicated. Precipitation falling as snow will be isolated to the high alpine.
Confidence
Low - Intensity of incoming weather systems is uncertain on Monday
Weather Forecast
Overnight SUNDAY: Wet snow or rain, accumulation 15-20 cm snow possible in the alpine / Alpine temperature 1 / Strong south wind / Freezing level 1500 mMONDAY: Rain, accumulation 10-15 cm snow possible in the alpine / Alpine temperature 3 / Moderate to strong south wind / Freezing level 1500-1800 m.TUESDAY: Wet flurries or showers, accumulation up to 5cm possible in the alpine / Alpine temperature 1 / Moderate southwest wind / Freezing level 1500 m.WEDNESDAY: Flurries / Alpine temperature -1 / Light to moderate south wind / Freezing level 1200 m.
Avalanche Summary
Expect to see loose wet avalanches right up into the alpine with the arrival of the latest storm Sunday through Monday. No recent avalanches have been reported. However, we currently have very limited observations. If you have been out, please submit any observations to the Mountain Information Network MIN.
Snowpack Summary
Expect to see moist or wet surface snow with the arrival of a warm southwesterly storm system Sunday night through Monday. There is an average of 60-110 cm of snow in the alpine. This decreases dramatically with elevation where the primary hazards are rocks, stumps, and open creeks. For those areas that have more snow, remember that if there is enough snow to ride, there is enough snow to slide. We currently have very limited snowpack observations, so it is critical to supplement this information with your own observations.5-15 cm of recent storm snow is sitting on a crust that was formed during last week's temperature inversion. There is likely an early season crust near the bottom of the snowpack.
Problems
Loose Wet
Loose Wet avalanches are the 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. 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.
Storm Slabs
Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.