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Avalanche Forecast

Archived

Jan 25th, 2019–Jan 26th, 2019

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

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The Bottom Line: Expect sunshine and unseasonably warm temperatures on Saturday. Anticipate changing snow surface conditions with increasing potential for wet loose avalanches throughout the day. Triggering an avalanche in wind-drifted snow may still be possible in isolated upper elevation terrain.

Snow and Avalanche Discussion

No new avalanches were reported in adjacent zones on Friday. Cloud cover and northwesterly winds kept snow surfaces relatively cool. A breakable crust exists on all aspects to at least 5000ft (higher on southerly aspects). This presented challenging travel conditions the past two days. Evidence from Wednesday’s widespread avalanche cycle is easy to find.

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.

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.