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Avalanche Forecast

Archived

Mar 17th, 2018–Mar 18th, 2018

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

Regions

Jasper.

Unsettled weather for Sunday. Traces of precip and a weak overnight recovery. Freezing levels to rise to TL elevations over the morning.

Weather Forecast

Continued unsettled weather with light precip overnight Saturday and over the day Sunday. Freezing levels at or near 1700 to 1900m. Alpine low temperatures of -7 overnight and high of -4 for Sunday.

Snowpack Summary

10-15cm of fresh, dense snow has created fresh storm slabs. This came in wet and heavy and has bonded well to a warming, settling snowpack. Deeper persistent instabilities remain a concern in the snowpack but have not produced observable activity recently. Loose wet slides continue to trigger and entrain the accessible snow around.

Avalanche Summary

Wet point release avalanches will continue to be a problem whenever the rain line, freezing levels and solar spikes hit spring normals. 

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.