Avalanche Canada dsaly, Avalanche Canada

Lizard Range and Flathead Avalanche Forecast

Mar 28th, 2020 5:00PM

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

This forecast lacks field observations and has lots of uncertainty. This will be the last avalanche forecast of the season. Reactive wind slabs remain the primary concern, especially around ridge features and wind loaded terrain.

Summary

Confidence

Low - Uncertainty is due to the limited number of field observations.

Weather Forecast

Saturday night: Cloudy with isolated flurries, trace to 5 cm. Alpine low temperature -6 C. Moderate southwest wind. Freezing level 1300 m.

Sunday: Flurries and snow, 5-10 cm. Alpine high temperature -1 C. Moderate southwest wind gusting to strong. Freezing level 1800 m.

Monday: Flurries and snow, 10-15 cm. Alpine high temperature -5 C. Moderate to strong southwest wind. Freezing level 1500 m.

Tuesday: Cloudy with scattered flurries, 5-10 cm. Alpine high temperature -9 C. Moderate southwest wind. Freezing level 1000 m.

Avalanche Summary

We have very limited field observations at this time. There have be no new avalanches reported in the region.

Snowpack Summary

Recent snow has been impacted by wind and warm temperatures. Cold, dry snow persists at higher elevations and consists of a variety of wind affected surfaces. A crust has formed on steep solar slopes and below 1700 m. 

A layer of faceted grains down 30 to 60 cm overly a melt-freeze crust from early February. The base of the snowpack may contain a weak layer of faceted grains that are most prominent in shallow rocky start zones with a snowpack depth of 150 cm or less.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Make conservative terrain choices and avoid overhead hazard.

Problems

Wind Slabs

An icon showing Wind Slabs

Likelihood

Possible-Likely

Expected Size

1 - 2

Steady winds continue to impact loose, dry snow. The most reactive deposits will be on leeward slopes, particularly near ridgetop.

Aspects:

North, North East, East, South East, North West.

Elevations:

Alpine, Treeline.

Loose Wet

An icon showing Loose Wet

Likelihood

Unlikely-Possible

Expected Size

1 - 2

Rising freezing levels and precipitation may trigger snow shedding from steep slopes.

Aspects:

All aspects.

Elevations:

Alpine, Treeline.

Valid until: Mar 30th, 2020 5:00PM