Watch for signs of instability, such as cracking and avalanche activity at higher elevations. Use caution at low elevations if the snow surface is wet, especially if the sun comes out for any length of time.
Summary
Confidence
Moderate - Timing or intensity of solar radiation is uncertain on Sunday
Weather Forecast
We're looking at seasonal temperatures in a north / westerly flow. Snow fall amounts are uncertain, as is the cloud cover on Sunday: Sunny conditions will increase avalanche danger. SUNDAY: Cloudy with sunny breaks in the morning; light snowfall late in the day (accumulation 3 to 8 cm possible). Light northerly winds. Alpine temperature -1 C. Freezing level 1400 m.MONDAY: Cloudy with isolated flurries. Moderate westerly winds. Alpine temperature +1 C. Freezing level rising to 1600 m.TUESDAY: Cloudy with sunny breaks. Light westerly winds. Alpine temperature +2 C. Freezing level 1700 m.
Avalanche Summary
On Friday, several small wet loose avalanches were reported on sunny aspects at all elevations. A size 1.5 natural cornice failure was also reported on a high north east facing ridge line, which did not trigger any slabs below.
Snowpack Summary
Variable but overall small amounts of new snow fell at high elevations and rain fell at low elevations on Thursday. The sun came out on Friday and Saturday, creating a melt-freeze crust on sunny aspects, but still leaving dry snow to be found on north aspects above 1300m.Thursday's snow fell on a previous melt-freeze crust produced by warm air temperatures, sun, and rain. The crust exists everywhere except for possibly shady aspects at high elevations. Deeper in the snowpack, the mid-December and late-November weak layers are composed of crusts and sugary facets, which are down 150-300 cm. These layers have been dormant but may be awoken by a large trigger, such as a cornice fall, or by humans traveling in thin-to-thick snowpack areas.
mgrist,
Avalanche Canada
