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Avalanche Forecast

Archived

Apr 21st, 2019–Apr 22nd, 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, 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.

Regions

Northwest Inland.

Due to a very limited number of information sources at this time of year, this report is based off of weather forecast information only. If you have been out recently, send us your observations by submitting to the Mountain Information Network (MIN).

Confidence

Low - Due to the number of field observations

Weather Forecast

SUNDAY Night: Flurries at upper elevations, accumulation 5-10 cm / moderate south wind / alpine high temperature -2 / freezing level 1000 m

MONDAY: Flurries at upper elevations, accumulation 5-10 cm / moderate to strong west winds / alpine high temperature 0 C, freezing level 1400 m

TUESDAY: Sunny with cloudy periods / moderate southwest wind / alpine high temperature -3 C / freezing level 900 m

WEDNESDAY: Mix of sun and cloud / light west wind / alpine temperature -2 / freezing level 1000 m

Avalanche Summary

There have been no recent reports of avalanche activity. If you're out we'd love it if you would submit what you're seeing to the Mountain Information Network.

Snowpack Summary

Expect to see 5-10 cm of new snow at upper elevations Monday morning on top of the 15-30 cm of new snow accumulated over the past week. This all likely sits over a widespread, supportive melt-freeze crust from early April. Surface hoar and facets were previously observed on this crust on high north aspects. At lower elevations, ongoing warm weather has been promoting isothermal snowpack conditions and melting the snowpack away.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.