Avalanche Forecast

Issued: Jan 13th, 2012 8:03AM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Wind Slabs, Storm Slabs and Persistent Slabs.

Parks Canada ali haeri, Parks Canada

24hr weather summary:Winds at Macdonald West Shoulder averaged S - 45km/h. Roundhill averaged SW - 25km/h. 2cm new snow at Mt-Fidelity, no new at Rogers Pass.Temperatures, Mt-Fidelity: -13 to -8, -13 at 07:00. Rogers Pass: -18 to -11,-12 at 07:00

Summary

Problems

Wind Slabs

An icon showing Wind Slabs
Wind slabs continue to remain the main concern at high elevations in the alpine, use caution lee of alpine ridge crests and on cross loaded features.

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 3

Storm Slabs

An icon showing Storm Slabs
A freezing rain crust down 50 - 60cm more prevalent west of Rogers Pass summit, shows signs of strengthening but skier triggering remains possible.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

2 - 3

Persistent Slabs

An icon showing Persistent Slabs
The Dec. 11 SH layer down 100 - 150cm may produce avalanches when heavily loaded. Cornice failure which is a current concern or a step down from a shallower avalanche are examples.

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

Elevations: Alpine, Treeline.

Likelihood

Unlikely

Expected Size

2 - 3

Valid until: Jan 14th, 2012 8:00AM