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Avalanche Forecast

Archived

Apr 13th, 2019–Apr 14th, 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.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Inland.

Winter is coming... back and new snow should improve riding quality, especially in the alpine. But, new snow and wind may be forming fresh slabs, so you need to carefully check out the bond of the new snow before committing to your line.

Confidence

Moderate - Forecast snowfall amounts are uncertain on Sunday

Weather Forecast

Winter is coming, back, at least to the alpine for the next few days. These storm systems are pretty convective which makes it difficult to pin down accurate snowfall amounts, but the weekend storm should offer a modest amount of snow for the region. There is a bit of a lull Sunday through Tuesday before another shot of precipitation looks to make landfall Tuesday night.SATURDAY NIGHT: Freezing level around 500 m, moderate northwest wind, 1 to 7 cm of snow.SUNDAY: Broken cloud cover, freezing level around 1200 m, light west wind, trace of snow possible. MONDAY: Broken cloud cover, freezing level rising to around 1300 m, light southwest wind, trace of snow possible. TUESDAY: Overcast, freezing level around 1200 m, moderate to strong southwest wind, 2 to 5 cm of snow possible.

Avalanche Summary

The last reported avalanche activity came on Thursday when small loose wet avalanches were reported from steep terrain. If you're out we'd love it if you would submit what you're seeing to the Mountain Information Network.

Snowpack Summary

The region is receiving a bit of new snow, but as of Saturday afternoon amounts are less than 5 cm. As we enter into mid-April we're dealing with a classic warm snowpack. At and below treeline the snowpack is becoming isothermal. We're entering a cooler period for the next few days, so a surface crust is expected to remain supportive. This supportive crust is what the new snow will come to rest on in most locations. The exception is high elevation north facing features where up to 20 cm of cold dry snow sits above the April 4th crust which may have some surface hoar or facets above it.

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.