Storm slabs may be triggered in steep, open terrain. Keep an eye out for areas where there is more than 20 cm of snow and watch for signs of instability like shooting cracks.
15 to 20 cm of new snow has buried a surface hoar layer formed over various hard wind-pressed snow surfaces, facets, and melt-freeze crusts. These storm slabs could be triggered in steep, open terrain features at treeline.
Recent new snow has buried a large, widespread surface hoar layer. These small storm slab avalanches could be triggered in specific areas like steep, open terrain features at treeline.
A MIN report from the Baldy rocks area observed that new snow was not bonding to the previous surface with small, dry loose activity.
Observations are limited this time of year. Please consider filling out a MIN report if you head out in the backcountry! 🙏
An additional 5 cm of new snow brings snowfall totals between 15 and 20 cm over a surface hoar layer formed during the clear, cool weather over various surfaces of wind-pressed snow, sun crust, and faceted soft snow.
The mid-pack is generally faceted. Near the base of the snowpack is a crust with facets or depth hoar beneath it.
Expect early-season conditions with a shallower-than-average snowpack. At treeline and the upper end of below treeline, snowpack depths are between 50 to 80 cm. Below this, snowpack depths taper quickly. Check out the new Forecaster Blog Trouble ahead?
Sunday Night
Cloudy with scattered flurries, 2 to 3 cm accumulation. South alpine wind 15 to 20 km/h. Treeline temperature -5 °C.
Monday
Increasing clouds in the afternoon with flurries 3 to 5 cm, snow starting overnight, south alpine winds increasing, 20 to 40 km/h. Treeline temperature -3 °C increasing overnight with rising freezing levels.
Tuesday
Cloudy with mixed precipitation, 30 to 40 cm accumulation, snow switching to rain. Southwest alpine wind 20 to 30 km/h. Treeline temperature 3 °C. Freezing level 2500 to 2700m.
Wednesday
Cloudy with flurries, 5 to 8 cm accumulation. Southwest alpine wind 5 to 10 km/h. Treeline temperature 0 °C.
More details can be found in the Mountain Weather Forecast.
