Avalanche Forecast Waterton Lakes National Park

Date Issued: Valid Until:

Parks Canada Tim Haggarty, Parks Canada

Avalanche Forecast

Fri Mar. 23rd ยท 4:00PM

Alpine

Danger Ratings Considerable

Treeline

Danger Ratings Considerable

Below Treeline

Danger Ratings Moderate
Wind Slabs Wind Slabs
Storm Slabs Storm Slabs
Persistent Slabs Persistent Slabs

Alpine

Danger Ratings High

Treeline

Danger Ratings Considerable

Below Treeline

Danger Ratings Considerable

Alpine

Danger Ratings High

Treeline

Danger Ratings Considerable

Below Treeline

Danger Ratings Considerable

Problems

Wind Slabs

Wind Slabs

Winds form varying directions have been active recently creating soft slabs in areas you would not normally expect to find them. Feel for these slabs in open areas with your poles and avoid large or planar slopes where they may be present.

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

Elevations: Alpine, Treeline.

Likelihood

Very Likely - Likely

Expected Size

1 - 3
Storm Slabs

Storm Slabs

Below 1900m the recent snow is sitting on a rain crust: the bond here may deteriorate especially with warming. At upper elevations the recent snow is less distinct but layers of different densities are present: dig down to confirm the bond.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely - Possible

Expected Size

1 - 2
Persistent Slabs

Persistent Slabs

The warming March 10 created a thick crust in most areas to treeline and to ridgelines on solar aspects now down 1m+. This crust is showing signs of breaking down and as the slab consolidates above this layer it could become reactive to heavy loads.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible - Unlikely

Expected Size

1 - 3