Avalanche Forecast
Issued: Mar 18th, 2024 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs and Loose Wet.
jpercival,
Avalanche Canada
Continue to choose mellow terrain, and avoid being under steep slopes especially during periods of sun.
Triggering large avalanches is still possible until a strong surface crust forms.
Summary
Confidence
Avalanche Summary
No new avalanches were reported on Sunday.
On Saturday, a widespread natural avalanche cycle up to size 2.5 continued, with some loose wet avalanches even being reported on north aspects.
On Friday, several natural persistent slab avalanches were observed, primarily on solar aspects, up to size 2.5.
As temperatures start to drop, we expect natural avalanche activity to be less common.
Snowpack Summary
Previously moist or wet snow surfaces have began to form into a melt freeze crust. It is expected that this cooling will begin to build a strong and robust surface that will suppress sensitivity of triggering avalanches.
A thick and hard widespread crust that formed in early February is buried about 50 to 110 cm deep. This crust has a layer of facets above it in many areas.
The eastern portion of this region has a much shallower, highly variable and wind-affected snowpack.
Weather Summary
Monday Night
Clear. No new precipitation. Freezing level 2000 m dropping to 1200 m. Treeline temperature around -1 °C.
Tuesday
Becoming cloudy. Light to moderate southeast ridgetop wind. Freezing level 1200 m. Treeline temperature around -1 °C.
Wednesday
Cloudy. Moderate northeast wind. Freezing level dropping to valley bottom. Treeline low around -10 °C.
Thursday
Mostly cloudy. Moderate northwest wind. Freezing level dropping to valley bottom. Treeline low around -10 °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.
- Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.
- When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
Problems
Persistent Slabs
A weak layer of facets rests above a hard-melt freeze crust that formed early February. Human triggering of this layer remains possible until a hard surface crust starts to form.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Loose Wet
As temperatures and freezing levels begin to decrease and lower, sensitivity to triggering is excepted to rapidly plummet.
Aspects: All aspects.
Elevations: Treeline, Below Treeline.
Likelihood
Expected Size
Valid until: Mar 19th, 2024 4:00PM
