Avalanche Forecast

Issued: Feb 20th, 2012 4:00PM

The alpine rating is low, the treeline rating is low, and the below treeline rating is low. Known problems include Deep Persistent Slabs, Wind Slabs and Loose Dry.

rupert wedgwood, Parks Canada

Jasper.

Sun crusts can be expected on solar aspects of 20 degrees or more. They are still thin and breakable in many locations.

Summary

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

The weather pattern is stable on Wednesday

Problems

Deep Persistent Slabs

Conditions are generally stable but be cognisant of slopes threatened by large triggers such as overhead cornices on steep unsupported alpine features.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood

Unlikely

Expected Size

2 - 4

Wind Slabs

10-20cm slabs can be expected in steep isolated features such as wind loaded ridge top terrain. Solar warming may trigger these slides from rocky terrain.

Aspects: North, North East, East, South East.

Elevations: Alpine.

Likelihood

Unlikely - Possible

Expected Size

1 - 2

Loose Dry

A surface hoar layer is buried 2-10 cm's. Flurries and light-moderate winds are forecast now until Wednesday which will incrementally bury it deeper. The danger rating will increase once critical load achieved. Monitor this situation as it develops.

Aspects: North, North East, East, South East.

Elevations: All elevations.

Likelihood

Unlikely

Expected Size

1 - 2

Valid until: Feb 21st, 2012 4:00PM