Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches possible, human triggered probable.
Regions
South Coast Inland.
Sunshine and rising temperatures will elevate the avalanche danger throughout the week. Be aware of changing conditions throughout the day and avoid overhead hazards. This is our final daily forecast for the season which will expire on April 25th.
Confidence
Low - Due to the number of field observations
Weather Forecast
TUESDAY: Sunny. Light to moderate southwest wind. Alpine temperature +6. Freezing level 3000 m. WEDNESDAY: Sunny. Light northwest wind. Alpine temperature +9. Freezing level rapidly rising to 3500 m. THURSDAY: Sunny. Light west wind. Alpine temperature +11. Freezing level 3500 m.
Avalanche Summary
Avalanche reports have been limited due to very few information sources this time of year. If you have been out, please post your observations on the Mountain Information Network (MIN).
Snowpack Summary
A weak layer consisting of surface hoar, facets, and/or a melt-freeze crust from late March is now buried about 50 to 100 cm below the surface. This layer is spotty in its distribution; however, it has recently produced large and destructive avalanches. It is mostly likely to be problematic on west, north, and east aspects between 1900 m and 2250 m. I'd continue to treat this layer very cautiously and would anticipate increase reactivity on this layer with the warming forecast for the next few days.The mid and lower snowpack are well-settled and strong.
Problems
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.
Persistent Slabs
Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.