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Archived

Avalanche Forecast

Mar 28th, 2025–Mar 29th, 2025
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Flathead, Lizard, Lizard-Flathead.

There is uncertainty with the speed of recovery of the snowpack. Maintain conservative terrain choices while we transition to a cooler weather pattern.

Confidence

Moderate

Avalanche Summary

Large destructive avalanches were widespread throughout the warm-up, involving persistent weak layers.

Read the Forecaster Blog for an opportunity to reflect on this week's widespread avalanche activity.

Snowpack Summary

Roughly 10 to 15 cm from convective flurries may be deposited at upper elevations. Below this, a melt-freeze crust has formed and is more supportive as you gain elevation.

The upper snowpack is a mix of refrozen and moist snow over a well-settled mid-pack.

A surface hoar or facet layer from late January is buried 100 to 180 cm deep on north and east aspects at treeline and above.

Weather Summary

Friday Night

Cloudy. Isolated flurries, 1 to 3 cm. 20 to 30 km/h southwest ridgetop winds. Treeline temperature -2 °C. Freezing level 1500 m.

Saturday

Cloudy. Isolated flurries, 1 to 2 cm. 20 to 30 southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1700 m.

Sunday

Partly cloudy. Isolated flurries, 1 cm. 5 to 10 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1700 m.

Monday

Partly cloudy. Isolated flurries, 1 to 2 cm. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

Avalanche Problems

Loose Wet

Recent mixed precipitation will lose cohesion with rising daytime freezing levels.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5

Persistent Slabs

Steep, rocky terrain features where there is no supportive melt-freeze crust are areas of concern for human triggering this weak layer.

Aspects: North, North East, North West.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 2 - 3