Persistent Slabs
- Hochgebirge
- Waldgrenze
- Unterhalb der Waldgrenze
- Wahrscheinlichkeit
- Possible
- Größe
- 2
There is a widespread persistent weak layer (PWL) of faceted snow on mid and upper-elevation slopes facing northwest through north and east where it is possible to trigger an avalanche 1-3 feet deep. Slopes that have recently been wind-loaded are the most prone to avalanche, such as the photo below from Tuesday's avalanche near Catherine's Pass in the Salt Lake mountains. I don't think the recent south/southwest winds and today's snowfall are enough of a load to increase the danger substantially, but I also simply don't trust this PWL and I continue to avoid steep, north-facing slopes that have been wind-loaded and have a structure of denser/stronger snow over weaker snow.
The shady, northerly slopes where this PWL exists will become increasingly dangerous with more snow and wind forecast beginning Thursday.