Lizard Range and Flathead Avalanche Forecast

Issued: Apr 21st, 2021 4:00PM

Thu Apr 22nd Current Conditions
Alpine Moderate Treeline Low Below Treeline Low
Fri Apr 23rd 2 Day Outlook
Alpine Low Treeline Low Below Treeline Low
Sat Apr 24th 3 Day Outlook
Alpine Moderate Treeline Moderate Below Treeline Low

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

Convective flurries may form small wind slabs sitting on hard crusts on lee features in the alpine. Avoid recently wind loaded slopes until they have had a chance to stabilize. 

Summary

Confidence

High -

Weather Forecast

  

WEDNESDAY NIGHT: Cloudy / Light, west ridgetop wind / alpine low temperature -3 / Freezing level 1700 m.

THURSDAY: Cloudy with flurries; 3-10 cm. / Light, northwest ridgetop wind / alpine high temperature -1 / Freezing level 1500 m.

FRIDAY: Mix of sun and cloud / Light, west ridgetop wind / alpine high temperature 2 / Freezing level 2000 m.

SATURDAY: Snow; 10-20 cm. / Light, southwest ridgetop wind / alpine high temperature -2 / Freezing level 1500 m.

Avalanche Summary

No avalanches were reported in this region on Tuesday. However, observations are very limited at this time of year.

Snowpack Summary

Moist snow surfaces at all elevations/aspects formed by the recent warm weather have no frozen into hard crusts. Forecast flurries may form small winds slabs on lee features in the alpine. Large cornices hang like Gargoyles over alpine ridgetops. Cornice falls can trigger large avalanches on slopes below that a single rider may not trigger.

The snowpack is overall strong and settled in most areas. However, steep and rocky alpine slopes with a shallow or thin to thick snowpack may still harbor deeply buried weak layers. Glide cracks releasing as full depth glide slab avalanches become more common in the spring and are extremely difficult to predict. Best practice is to avoid slopes with glide cracks.

The snow line is slowly creeping up the mountains, making some access areas snow-free. 

Terrain and Travel

  • Carefully evaluate steep lines for wind slabs.
  • Stay off recently wind loaded slopes until they have had a chance to stabilize.
  • Caution around slopes that are exposed to cornices overhead.

Problems

Wind Slabs

An icon showing Wind Slabs

Likelihood

Unlikely-Possible

Expected Size

1 - 1.5

Convective flurries may form small wind slabs sitting on hard crusts on lee features in the alpine.

Aspects:

East, South East, South, South West.

Elevations:

Alpine.

Valid until: Apr 22nd, 2021 4:00PM

Forecast Trend

The latest forecast danger ratings, broken down to elevation. See how an elevation is trending.