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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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
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

Regions: Dogtooth, East Purcell, Purcells, West Purcell.

There is uncertainty with the speed of recovery of the snowpack. Maintain conservative terrain choices.

Confidence

Moderate

Avalanche Summary

A widespread, large, destructive avalanche cycle occurred across the region, involving persistent, and deep persistent slab avalanches. Wet loose and wet slab activity has been widespread throughout the region.

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

Snowpack Summary

Roughly 10 to 15 cm of storm snow may be deposited from convective flurries at upper elevations. New snow will further bury a variety of surfaces, including moist snow and a melt-freeze crust.

Crusts, persistent weak layers and facets near the base of the snowpack formed in January, February, and March remain intact in the middle and lower snowpack. There is uncertainty with how these layers are adjusting, and they remain a concern for human-triggering.

Weather Summary

Friday Night

Mostly cloudy, isolated flurries, 2 to 3 cm. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1700 m.

Saturday

Mostly cloudy, scattered flurries 3 to 10 cm. 10 to 15 km/h southwest wind. Treeline temperature -4 °C. Freezing level 1700 m.

Sunday

Partly cloudy, isolated flurries, 1 to 2 cm. 5 to 10 km/h southeast ridgetop wind. Treeline temperatures -4 °C.

Monday

Partly cloudy, isolated flurries, 1 to 2 cm. 15 to 20 km/h south ridgetop wind. Treeline temperatures -3 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • In times of uncertainty, conservative terrain choices are our best defense.
  • Be mindful that deep instabilities are still present and have produced recent large avalanches.

Avalanche Problems

Persistent Slabs

Several buried weak layers exist throughout the snowpack. These layers remain active while the snowpack adjusts to the most recent stress.

Aspects: North, North East, East, West, North West.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 2 - 3