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Avalanche Forecast

Archived

Apr 16th, 2019–Apr 17th, 2019

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Glacier.

Good skiing can be found in the Alpine on North and East aspects. Expect an elevated avalanche hazard on solar aspects.

Weather Forecast

Today: Mainly sunny, increasing cloudiness near noon, then 40 percent chance of showers this afternoon. Tonight: A few rain showers changing to flurries near midnight, FL dropping to valley bottom. Wednesday: Flurries ending in the morning then cloudy with a chance of rain showers. Thursday: 40mm of precipitation, freezing level rising to 2400m!

Snowpack Summary

Mt Fidelity received 35cm of storm snow Sunday/Monday, accompanied by S-SW winds; which formed storm slabs in the alpine and exposed areas of treeline. Storm slabs are overlying melt-freeze crust on all asp, at all elev, except Nth alpine. We should have a decent melt-freeze crust this morning with cool overnight temps and clear skies.

Avalanche Summary

A skier remote size 2 was triggered Sunday 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 Sunday, and was easily able to trigger storm slabs to size 1.

Confidence

Due to the number and quality of field observations

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.