Avalanche Forecast
Issued: Apr 27th, 2014 8:36AM
The alpine rating is Wind Slabs, Loose Wet and Deep Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Poor - Due to the number of field observations
Weather Forecast
On Monday expect a mix of sun and cloud with a chance of isolated flurries. Winds should be mainly light from the northwest with freezing levels hovering around 1800m. On Tuesday and Wednesday a dry ridge of high pressure will bring mainly clear skies, light winds and freezing levels climbing upwards of 2500m by Tuesday afternoon.
Avalanche Summary
Expect loose wet avalanches in steep terrain if it is raining or during sunny periods, especially if the sun or rain is affecting fresh snow. Spring squalls may bring locally heavy precipitation and new storm or wind slabs may develop in higher terrain if you see significant new snow accumulation. Cornices collapses have been reported during periods of daytime warming. Occasionally these heavy triggers have caused large deep slab avalanches on the slopes below.
Snowpack Summary
This is a broad summary of conditions is based on limited field data and should be supplemented with local observations to help assess avalanche danger.Over the last few days we have seen moderate to locally heavy amounts of new snow mixed with showers or periods of rain below 1600-1800 m with the greatest accumulations falling in the south of the region. Moderate winds have likely formed pockets of wind slab at higher elevations in lee of ridges and terrain features. The upper snowpack generally consists of layers of moist and/or dry snow mixed with several well bonded crusts. Below 1300-1500 m most areas are likely below threshold for avalanches depending on aspect. The mid-February crust/facet/surface hoar combo is typically down 150 - 200cm. Human triggered avalanches on this layer are unlikely. Larger triggers such as cornice fall, a smaller avalanche in motion or prolonged warming could wake this layer up, resulting in very large and destructive avalanche.
Problems
Wind Slabs
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Wet
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Deep Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Apr 28th, 2014 2:00PM