North Shore Avalanche Forecast
North Shore Avalanche Forecast
Click on the link above to go to the CAC site for the full advisory.
Travel Advisory: Issued: Wed, Jan 7 Next Scheduled Update: Sat, Jan 10 The current rain will likely cause an immediate short-term spike in danger that will quickly diminish as the rainfall comes to an end, the snowpack becomes completely saturated and cooling temperatures freeze everything solid on Friday. On Thursday, if you decide to venture out stick to low-angled primarily forested terrain and watch out for the massive tree bombs! New snow on Saturday will likely bond poorly to the newly formed crust.
Avalanche Activity: Issued: Wed, Jan 7 Next
Scheduled Update: Sat, Jan 10
Numerous small avalanches involving the new snow were skier triggered on Tuesday morning. As the snow rapidly accumulated then turned to rain on Tuesday afternoon, widespread avalanches up to 30 cm deep and some significantly larger, probably occurred, but reports are limited. As the surface snow becomes increasingly saturated, wet loose snow avalanches that can carry a significant amount of mass, also become more likely.
Furthermore, as rain water continues to add load to, and percolate through, the snowpack large slab avalanches involving a crust near the ground will become possible.
Snowpack: Issued: Wed, Jan 7 Next Scheduled Update: Sat, Jan 10
Check out the South Coast discussion forum for recent observations from the Cypress backcountry.
As rain water saturates the upper snowpack it becomes weak and cohesionless. Rain water can percolate through the upper snowpack pooling on and effectively destroying the bond to impermeable boundaries such as a crust approximately 40 cm above the ground. Furthermore, water also has the tendency to saturate weak low-density layers, such as the basal facets, making them even weaker. But as soon as the rain stops and the temperatures cool the entire snowpack will probably freeze up solid.
View Avalanche Observation Summary (NEW!) Weather: Issued: Wed, Jan 7 Next Scheduled
Update: Sat, Jan 10
Thursday: Up to 15mm of rain ending near midday then cloudy with a chance of showers or flurries, freezing levels at 1300m and dropping to 600m and moderate southwest winds shifting to Northwest.Friday: Snow developing in the afternoon with 5cm of accumulation and freezing levels at 500m, light westerly winds becoming moderate souteasterly.Saturday: Snow with 10 to 20cm of accumulation and freezing levels at 600m rising to 900m.
Prepared by: Cam Campbell
Click on the link above to go to the CAC site for the full advisory.
Travel Advisory: Issued: Wed, Jan 7 Next Scheduled Update: Sat, Jan 10 The current rain will likely cause an immediate short-term spike in danger that will quickly diminish as the rainfall comes to an end, the snowpack becomes completely saturated and cooling temperatures freeze everything solid on Friday. On Thursday, if you decide to venture out stick to low-angled primarily forested terrain and watch out for the massive tree bombs! New snow on Saturday will likely bond poorly to the newly formed crust.
Avalanche Activity: Issued: Wed, Jan 7 Next
Scheduled Update: Sat, Jan 10
Numerous small avalanches involving the new snow were skier triggered on Tuesday morning. As the snow rapidly accumulated then turned to rain on Tuesday afternoon, widespread avalanches up to 30 cm deep and some significantly larger, probably occurred, but reports are limited. As the surface snow becomes increasingly saturated, wet loose snow avalanches that can carry a significant amount of mass, also become more likely.
Furthermore, as rain water continues to add load to, and percolate through, the snowpack large slab avalanches involving a crust near the ground will become possible.
Snowpack: Issued: Wed, Jan 7 Next Scheduled Update: Sat, Jan 10
Check out the South Coast discussion forum for recent observations from the Cypress backcountry.
As rain water saturates the upper snowpack it becomes weak and cohesionless. Rain water can percolate through the upper snowpack pooling on and effectively destroying the bond to impermeable boundaries such as a crust approximately 40 cm above the ground. Furthermore, water also has the tendency to saturate weak low-density layers, such as the basal facets, making them even weaker. But as soon as the rain stops and the temperatures cool the entire snowpack will probably freeze up solid.
View Avalanche Observation Summary (NEW!) Weather: Issued: Wed, Jan 7 Next Scheduled
Update: Sat, Jan 10
Thursday: Up to 15mm of rain ending near midday then cloudy with a chance of showers or flurries, freezing levels at 1300m and dropping to 600m and moderate southwest winds shifting to Northwest.Friday: Snow developing in the afternoon with 5cm of accumulation and freezing levels at 500m, light westerly winds becoming moderate souteasterly.Saturday: Snow with 10 to 20cm of accumulation and freezing levels at 600m rising to 900m.
Prepared by: Cam Campbell
posted by John Blown at
3:13 PM
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