Sea To Sky

The likelihood of human-triggered avalanches will increase as the storm snow settles into a consolidated slab. Be mindful that small avalanches on the surface could step down to weak layers deep in the snowpack.

Several large (size 2 to 2.5) slab avalanches were produced during explosive control work on Thursday. All in alpine terrain on a variety of aspects. A number of avalanches slid on deep persistent weak layers, with crowns of 1.5 to 2 m deep.

Please continue to post your observations and photos to the Mountain Information Network.

Recent snowfall has been accompanied by moderate to strong southerly winds since Thursday. Below the new snow is a crust at higher elevations, while at lower elevations (below roughly 1600 m) the upper snowpack remains moist. Deeper in the snowpack a series of weak layers exist consisting of crusts, facets, and buried surface hoar.

Total snow depths are roughly 100 to 200 cm at treeline.

Friday night

Cloudy with snow, 10 to 20 cm. Moderate southwest winds. -5 C at treeline. Freezing levels 1000 m.

Saturday

Cloudy with light snow, 5 to 10 cm. Light southwest winds. -5 to -10 at treeline. Freezing levels 1000 m.

Sunday

Cloudy with periods of sun. No precipitation. Light southwest winds. -5 to -10 C at treeline. Freezing levels 700 m.

Monday

Mostly sunny, with no precipitation. Light southeast winds. -5 C at treeline. Freezing levels 800 m.

More details can be found in the Mountain Weather Forecast.

• Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
• Be especially cautious as you transition into wind affected terrain.
• Storm slabs in motion may step down to deeper layers resulting in large avalanches.