Avalanche Forecast
Issued: Feb 1st, 2019 5:31PM
The alpine rating is Storm Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
High -
Weather Forecast
FRIDAY NIGHT - Flurries, 5-15 cm / southwest winds, 30-50 km/h / alpine low temperature near -6SATURDAY - Cloudy with scattered flurries, 3-5 cm / southwest winds 20-30 km/h / alpine high temperature near -7SUNDAY - Mainly cloudy with isolated flurries, 3-5 cm / northeast winds 10-15 km/h / alpine high temperature near -15MONDAY - Sunny with cloudy periods / northeast winds, 10-15 km/h / alpine high temperature near -16
Avalanche Summary
A widespread natural avalanche cycle was reported on Friday, as were numerous human triggered avalanches to size 1.5. Some of these were remote triggered (triggered from a distance).Numerous human triggered avalanches to size 2 were reported in the region on Thursday. Most of these were on northerly aspects at treeline. They reportedly failed on the persistent weak layer that was buried in mid January.On Tuesday and Wednesday, numerous natural and human triggered avalanches were reported on both north and south aspects at all elevation bands. It is likely that some of these occurred on the mid January persistent weak layer as well.Also on Tuesday, in the neighboring Glacier National Park region, a human triggered size 3 avalanche occurred on a steep southeast facing slope in the alpine. There is a detailed report on the Mountain Information Network here
Snowpack Summary
40-80 cm of snow has fallen in the North Columbia region since Thursday. This new snow sits on surface hoar (feathery crystals), facets (sugary snow), wind slabs and a crust on sun-exposed slopes.A persistent weak layer that was buried in mid January is now buried 50-100 cm. This layer consists primarily of surface hoar, however there is also a crust associated with it on sun-exposed slopes. This layer has been most reactive at treeline and below.
Problems
Storm Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: Treeline, Below Treeline.
Likelihood
Expected Size
Valid until: Feb 2nd, 2019 2:00PM