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Avalanche Forecast

Mar 12th, 2025–Mar 13th, 2025
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
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
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

Touchy storm slabs will exist. Stick with a conservative trip plan and watch for signs of instability.

If the sun is out, natural avalanche activity will spike on solar slopes.

Confidence

Moderate

Avalanche Summary

On Tuesday, several human-triggered slab avalanches up to size 1.5 were reported from the North Shore mountains.

Storm slabs will likely continue to be reactive at treeline and above on Thursday. Expect natural avalanche activity to spike if the sun comes out.

If you are headed to the backcountry, please consider sharing your photos and observations from your day on the Mountain Information Network. Big shout out and gratitude to the folks who have this week. Thank you!

Snowpack Summary

15 to 20 cm of new snow fell by Wednesday afternoon. This could bring storm snow totals in the alpine to over 100 cm since the weekend. High north-facing slopes may see deeper deposits of wind-transported snow.

At treeline and below, the new snow will sit above a crust on all aspects. This crust has approximately 30 cm of dense, saturated storm snow below.

Check out this great MIN with snowpack observations from the Mount Seymour area.

Weather Summary

Wednesday Night

Cloudy with clear periods and isolated flurries. 10 to 30 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 500 m.

Thursday

Cloudy with some sunny periods and isolated flurries. 15 to 25 km/h southeast ridgetop wind. Treeline temperature -2 °C. Freezing level 700 m.

Friday

Cloudy with sunny periods. 10 to 15 km/h southeast ridgetop wind. Treeline temperature -3 °C. Freezing level 900 m.

Saturday

Cloudy with 5 to 10 cm of snow. 15 to 40 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 900 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Even brief periods of direct sun could produce natural avalanches.
  • Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.

Avalanche Problems

Storm Slabs

Touchy storm slabs are likely on Thursday. Back off if you encounter signs of instability like warming from the sun, whumpfing, shooting cracks or recent avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5