Avalanche Forecast Waterton Lakes National Park

Date Issued: Valid Until:

Parks Canada Tim Haggarty, Parks Canada

Avalanche Forecast

Fri Mar. 9th ยท 8:18PM

Alpine

Danger Ratings Considerable

Treeline

Danger Ratings Considerable

Below Treeline

Danger Ratings Considerable
Wind Slabs Wind Slabs
Persistent Slabs Persistent Slabs
Storm Slabs Storm Slabs

Alpine

Danger Ratings Considerable

Treeline

Danger Ratings Considerable

Below Treeline

Danger Ratings Considerable

Alpine

Danger Ratings Considerable

Treeline

Danger Ratings Considerable

Below Treeline

Danger Ratings Moderate

Problems

Wind Slabs

Wind Slabs

Previous wind slabs are now buried 15cm and still could be triggered by skiers. NW winds forecast for Wed will be building windslabs outside of normal locations. With all the new snow from the weekend, these slabs will grow quickly.

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

Elevations: Alpine, Treeline.

Likelihood

Likely - Possible

Expected Size

1 - 3
Persistent Slabs

Persistent Slabs

Suncrusts and Surface Hoar now down 50 to 100 cm. Watch daytime heating on solar slopes above the crusts. Isolated areas on Northerly slopes protected from the sun and wind may hold surface hoar. If triggered these slabs would be large.

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

Elevations: All elevations.

Likelihood

Possible - Unlikely

Expected Size

2 - 3
Storm Slabs

Storm Slabs

The recent storm snow is settling with the effects of wind and heating forming a stiffer slab. These shallow slabs are weakened with daytime heat and will be sensitive to light loads: skiers, snow rolling off of rocks and trees or moist sloughs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 2