It is all about the freezing level. Precipitation will be steady Monday night into Tuesday. Avalanche danger will increase as you gain elevation where the precipitation is more likely to be falling as snow.
Confidence
Moderate - Freezing levels are uncertain on Tuesday
Weather Forecast
MONDAY NIGHT: 25-35 mm rain / 25-35 cm snow at higher elevations. Alpine temperature -2. Freezing level 1300 m. Strong south wind.TUESDAY: 10-20 mm of rain / 10-20 cm snow at higher elevations. Alpine temperature -1. Moderate southwest wind. Freezing level 1500 mWEDNESDAY: Rain showers or flurries, accumulation 5cm. Alpine temperature -3. Light southwest wind. Freezing level 1200 mTHURSDAY: 30-40 mm rain / 30-40 cm snow at higher elevations. Alpine temperature 1. Strong southwest wind. Freezing level 2000 m.
Avalanche Summary
No new reports of avalanches in the region; however, in the neighbouring Sea to Sky region numerous natural and explosives controlled avalanches have been reported through the last several days. Similar avalanche activity could likely be found at high elevations in the South Coast region. The latest storm arriving Monday night will start a fresh round of direct action avalanches on steeper or leeward facing slopes at upper elevations where more than 20 or 30 cm of snow accumulates.
Snowpack Summary
Recent precipitation has come as rain resulting in a moist or wet surface snow. The exception is higher elevations near Squamish where dry snow likely exists. For these higher elevation areas, expect to see storm snow from the past few days approaching 100cm with accompanied thick wind deposits in alpine lee terrain. In alpine areas near Squamish, snow depths are now over 200 cm.
Problems
Storm Slabs
Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.
Loose Wet
Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.