Avalanche Forecast
Issued: Feb 22nd, 2019 5:07PM
The alpine rating is Persistent Slabs and Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
High -
Weather Forecast
FRIDAY NIGHT - Cloudy with clear periods and isolated flurries / northeast winds 10-15 km/h / alpine low temperature near -17SATURDAY - A mix of sun and cloud / northeast winds 10-15 km/h / alpine high temperature near -17SUNDAY - Sunny with cloudy periods / northeast winds 10-15 km/h / alpine high temperature near -16MONDAY - A mix of sun and cloud / northeast winds, 10-20 km/h / alpine high temperature near -18
Avalanche Summary
On Thursday, a few natural and human triggered size 1-1.5 avalanches were reported.On Wednesday, there were reports of several human triggered size 1 wind slab avalanches. Check out this MIN report from Wednesday.There were no avalanches reported Sunday through Tuesday.Last Saturday, a persistent slab avalanche was triggered by a skier on a north aspect on a 30 degree slope. Check out the MIN report here. These sorts of avalanches are becoming less frequent, but they are still possible and the consequences are high.
Snowpack Summary
Up to 5 cm of new snow fell on Friday with moderate to strong southwest winds. The new snow sits on top of approximately 10-30 cm of low density snow in some areas, and wind slabs in other areas. Due to previous variable wind directions, wind slabs may be found on all aspects, mainly in the alpine and at treeline. A weak layer that was buried in mid January is now buried anywhere from 30-60 cm. This layer consists of surface hoar (feathery crystals) and facets (sugary snow). The layer also likely consists of a crust on south facing slopes. Avalanche activity on this layer has slowed, but test results, and recent observations of whumphing still indicate that this layer may still be easy for humans to trigger in certain locations. It has been most reactive at treeline and below treeline.The lower snowpack is considered generally strong.
Problems
Persistent Slabs
Aspects: All aspects.
Elevations: Treeline, Below Treeline.
Likelihood
Expected Size
Wind Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Feb 23rd, 2019 2:00PM