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Avalanche Forecast

Archived

Apr 15th, 2019–Apr 16th, 2019

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, 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

Glacier.

Winter is back at higher elevations; touchy storm slabs are easily triggered in the Alpine and upper Treeline.

Weather Forecast

Classic spring weather continues today with a cool and unstable airmass over RP giving isolated to scattered flurries in the alpine. Freezing level should rise to 1800m this afternoon with an alpine high of -4C along with light westerly winds. A mix of sun and cloud for Tuesday, clearing into the evening, and clouds building back in on Wed.

Snowpack Summary

30cm+ of storm snow in the last 48 hours with mod SW-S winds has formed storm slabs in the alpine and exposed areas of treeline. Storm slabs are overlying melt-freeze crust on all asp, and elev, except Nth alpine. Poor crust recovery BTL with the new snow insulating the melt freeze crust, which covers isothermal snow.

Avalanche Summary

A skier remote size 2 was triggered yesterday on Video Peak. There were six skiers in the vicinity, three involved, no gear lost, no burials, and no injuries. The party that triggered the avalanche had deviated from the regular ascent route to Video Pk. Another group was in the Balu Pass area, and was easily able to trigger storm slabs to size 1.

Confidence

Due to the number and quality of field observations

Problems

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.

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.