Use caution in wind affected terrain, and give cornices and their run-outs a large amount of respect.
Summary
Confidence
Moderate - Timing or intensity of solar radiation is uncertain
Weather Forecast
The Northwest Inland will see light precipitation through the weekend in advance of a ridge of high pressure that will bring clear skies and warm temperatures. TODAY: Freezing level dropped to around 700m last night but should rise to around 1200 m during the day. 5 to 10 cm of snow in the forecast, light to moderate south/southwest winds. SUNDAY: Freezing level dropping to 700 m overnight, then rising to 1200 m during the day. 1 to 5 cm of snow, with light winds from the southwest. MONDAY: Freezing level dropping to 600 m overnight, then beginning to rise to 1100 m by midnight. Light west winds, but no precipitation in the forecast for Monday. TUESDAY: Will start with the freezing level around 900 m, then begin a slow but steady rise to end the day around 2500 m. No precipitation on Tuesday and light to moderate west winds.
Avalanche Summary
Reports from yesterday tell of moist snow, loose-wet avalanches up to size 1.5 on solar aspects, and in the north of the region, a natural size 2 avalanche was observed on north facing terrain at 2100 m. It is believed to have been the new storm snow running on March 23rd surface hoar. The slab was 25 cm deep and started on a 40 slope.
Snowpack Summary
In the last 48 hours 5 to 10 cm of snow has fallen accompanied by moderate to strong southerly winds. At treeline and in the alpine small wind slabs are expected to have formed. These wind slabs overlie a variety of surfaces which include a hard crust on solar aspects above 1300 m, moist or refrozen snow on all aspects below 1300 m, and settled wind slabs in exposed high elevation terrain. A layer of surface hoar or melt-freeze crust buried on March 3 is down 50-80 cm and has been on the radar of professionals in the mountains north of Stewart. A more widespread crust/facet layer buried in early February can now be found down over a metre. Both of these deeper layers have become less likely to trigger, but have the potential for large avalanches especially with a large trigger such as a cornice fall. I'd be increasingly cautious during periods of warming and intense solar radiation.
bcorrigan,
Avalanche Canada
