Avalanche Forecast
Issued: Apr 19th, 2017 4:04PM
The alpine rating is Cornices and Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Low - Due to the number of field observations
Weather Forecast
THURSDAY: Cloudy with isolated flurries / Light-Moderate southwest wind / Alpine temperature -3 / Freezing level 1900mFRIDAY: Mix of sun and cloud / Light to moderate west wind / Alpine temperature -2 / Freezing level 2100mSATURDAY: Cloudy with sunny periods / Light south wind / Alpine temperature 0 / Freezing level 2400mNOTE: Convective flurries, which are common this time of year, can result in widely varying snowfall amounts. These spring squalls routinely drop 20+ cm of snow in one valley while the adjacent drainage remains dry. For this reason, the distribution of avalanche problems associated with new snow vary greatly within a region.
Avalanche Summary
Recent reports are very limited but include human triggered avalanches to size 1.5 on west and east aspects at tree line. These were isolated to recent storm snow accumulations 25cm deep. Exposure to large overhanging cornices remains a significant concern.
Snowpack Summary
Recent new snow tree line and above has been redistributed by west and south winds. Cornices remain large and continue to become more overhanging. The middle of the snowpack is generally well settled and continues to transition into a spring melt/freeze regime except for high elevation northerly aspects. Expect the entire thickness of the snowpack to be moist or wet at lower elevations. At upper elevations a deep persistent layer consisting of facets sitting on a crust that was buried back in November has been sporadically reactive to heavy loads i.e. a cornice fall or the weight of a smaller avalanche running.
Problems
Cornices
Aspects: North, North East, East, South East.
Elevations: Alpine.
Likelihood
Expected Size
Wind Slabs
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Apr 20th, 2017 2:00PM