Avalanche Forecast
Issued: Apr 21st, 2019 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Persistent Slabs.
jasper snow safety,
Parks Canada
Use conservative route finding to manage a freshly loaded persistent problem.
Keep an eye out for building windslabs.
Summary
Weather Forecast
Monday upto 8cm of snow accompanied by moderate SW winds gusting to 55km. Freezing levels to rise to 2200M
Tuesday will see cloud with an additional 5-10cm throughout the day along with moderate west winds. 2200M freezing levels
Wednesday will see slightly cooler temps -6 with winds remaining in the moderate west range and lower freezing levels 1900M
Snowpack Summary
15cm of recent settled snow now overlies several crusts / facet layers in the upper 40cm, and a faceted layer down 70cm on shady aspects. Expect isothermal snow at lower elevations.
Avalanche Summary
Recent whumfing in low angle alpine terrain.
Natural and controlled avalanche cycle on friday produced persistent slabs, wind slabs and loose dry avalanches to mainly size 2 max size 3 in the alpine.
Confidence
Problems
Wind Slabs
Rising winds monday will redistribute recent storm snow to Lee features
- Use caution in lee areas in the alpine and treeline. Recent storm snow has formed wind slabs.
- Watch for whumphing, hollow sounds and shooting cracks.
Aspects: North, North East, East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
The new snow load initiated a natural cycle on this problem the past couple of days. Give it a few days to settle.
- Note recent avalanche activity.
- Carefully evaluate terrain features by digging and testing on adjacent, safe slopes.
Aspects: North, North East, East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Apr 22nd, 2019 4:00PM
