Avalanche Forecast Waterton Lakes National Park

Date Issued: Valid Until:

Parks Canada Marcus Waring, Parks Canada

Avalanche Forecast

Mon Apr. 22nd ยท 4:00PM

Alpine

Danger Ratings Below Threshold

Treeline

Danger Ratings Below Threshold

Below Treeline

Danger Ratings Below Threshold
Loose Wet Loose Wet
Deep Persistent Slabs Deep Persistent Slabs

Alpine

Danger Ratings Below Threshold

Treeline

Danger Ratings Below Threshold

Below Treeline

Danger Ratings Below Threshold

Alpine

Danger Ratings Below Threshold

Treeline

Danger Ratings Below Threshold

Below Treeline

Danger Ratings Below Threshold

The snowpack is mainly in the grips of daily spring temperature swings however a basal weaknesses remains preserved under a winter snowpack on high north faces.

Weather Forecast

A mix of sun and cloud with moderate SW winds Tuesday - Thursday. Freezing level 2300m

A significant amount of precipitation is expected to arrive on friday and continue through the weekend. Freezing levels are uncertain.

Snowpack Summary

In most areas we are seeing a typical spring snowpack with crusts breaking down in the heat of the day. The exception is high North facing terrain where temperatures have stayed cold and a winter snowpack remains, with facets continuing to linger at the base. The midpack is generally well settled.

Avalanche Summary

No recent avalanches observed.

Confidence

Problems

Loose Wet

Loose Wet

Recent snow may begin to slide on solar aspects as the sun makes an appearance and temperatures rise.

  • Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.
  • Use extra caution on solar slopes or if the snow is moist or wet.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 1.5
Deep Persistent Slabs

Deep Persistent Slabs

Deep layers are still responsive to large triggers (think cornices or rain) on high north faces. Though triggering this layer is unlikely, it's not impossible as evidenced by a large avalanche on Mt. Blackiston last week.

  • Pay attention to overhead hazards like cornices which could trigger the deep persistent slab.

Aspects: North.

Elevations: Alpine.

Likelihood

Unlikely

Expected Size

2 - 3