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Avalanche Forecast

Archived

Apr 25th, 2019–Apr 26th, 2019

Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

Glacier.

We should see a loose wet cycle today with the strong solar input. Storm slabs are still lurking in the Alpine, and Treeline.

Weather Forecast

Mainly sunny today, light winds, no precipitation, and the freezing level will reach 2100m. Friday we could start to see some flurries, freezing level again may reach 2100m, with light to mod westerly winds. 10mm of precipitation will have accumulated by Saturday morning, followed by a general clearing trend Sunday into next week.

Snowpack Summary

All solar aspects to tree-line will have a melt-freeze crust this morning, and possibly into the alpine; isothermal snow lives below any of these surface crusts. Storm snow totalled over 50cm in the high Alpine, and N-NE aspects will have retained the driest snow. In certain locations storm slabs have been reactive down to treeline.

Avalanche Summary

Small slab avalanches were observed in the HWY corridor yesterday to size 1.5 (Hermit & Avalanche Crest). A widespread avalanche cycle to size 3 occurred last Friday. On Saturday skiers triggered a size 2.5 slide on the Youngs Peak headwall. On Monday activity tapered off significantly with only 3 avalanches recorded to sz 2.5 in the HWY corridor.

Confidence

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.