Avalanche Forecast Waterton Lakes National Park

Date Issued: Valid Until:

Parks Canada adam greenberg, Parks Canada

Avalanche Forecast

Mon Mar. 4th ยท 4:00PM

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Low
Wind Slabs Wind Slabs
Deep Persistent Slabs Deep Persistent Slabs

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Low

Alpine

Danger Ratings Considerable

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Low
Skiing is fantastic with calm winds and silky snow. Expect this to change on Thursday as winds increase.

Weather Forecast

Tuesday: Calm winds and increasing cloudiness through the day. Alpine high -8Wednesday: Cloudy with isolated flurries as the winds switch to SW increasing in the eveningThursday: Flurries ending in the morning with ridgetop winds increasing to 50km/h from the SW. Rising temperatures with an alpine high of -4

Snowpack Summary

10-15cm of powder is covering variety of wind affected surfaces at all elevations including old windslabs on all aspects in the Alpine and at Treeline. This loose snow will form new windslabs with increasing wind beginning Tuesday night. The midpack is generally strong in thick snowpack locations, and is bridging weak basal facets.

Avalanche Summary

A field trip to the Cameron Lake area on Monday saw isolated small loose dry avalanches out of steep rocky terrain

Confidence

Problems

Wind Slabs

Wind Slabs

Old windslabs are lingering in the alpine, and new windslabs will be forming as winds increase from the SW on Thursday

Use caution in lee areas. Wind loading will create slabs.Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

1 - 2
Deep Persistent Slabs

Deep Persistent Slabs

The basal weaknesses are well bridged in deeper snowpack areas, but there remains the possibility to be surprised in thin snowpack areas.

Avoid steep convexities or areas with a thin or variable snowpack.Avoid thin, rocky or unsupported slopes.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Unlikely

Expected Size

1.5 - 2.5