A light refresh from the 5cm overnight will improve travel conditions.
The persistent weak layer (PWL) in the upper snowpack is the main concern. Though it's out of sight, it should not be out of mind.
Variability in test results fuels uncertainty in this layer, and as a result, necessitates a cautious approach in the field.
Last week's storm buried a persistent weak layer (PWL) that consists of suncrust, facets and/or surface hoar in some locations. Warm temps promoted the settling of a cohesive slab on top of this layer. Snowpack tests in less-traveled zones have shown the slab is reactive to human triggering.
Loose/dry surface sluffing is easily initiated by rider traffic.
The warm, wet cycle from earlier in the week triggered avalanches up to size 3.0, gouging to ground at lower elevations where the snowpack had become isothermal.
Up to 5cm of snow overnight has buried variable surfaces, including a breakable crust, widespread surface hoar, and sastrugi in the Alpine.
Lurking below this is a persistent weak layer (PWL) of surface hoar, facets and/or suncrust (Jan 30th) 50-80cm down. Feb 16 is another PWL (facets/crust/surface hoar) down 30-40cms. Both of these layers are reactive to human triggering, and are present/reactive in lesser traveled areas within the park (ie Bostock Pass).
A drying trend over the next couple of days with seasonal temps and no snow.
Tonight Gradual clearing. Alpine low -7°C. Ridge winds 10km/h. Freezing level (FZL) 1000m
Thurs Mix of sun and cloud. Alp high -5°C. Light NW wind. FZL 1600m
Fri Mix of sun and cloud. Alp high -5°C. Ridge winds SW 20km/h. FZL 1600m
Sat Flurries. 5-10cm. Alp high -5°C. Ridge winds SW 30-45km/h. FZL 1400m
