Avalanche Forecast

Issued: Jan 24th, 2019 4:34PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is moderate. Known problems include Persistent Slabs.

kdevine, Avalanche Canada

Sea To Sky.

Rising temperatures could mean that avalanche hazard increases throughout the day. Choose more conservative terrain if significant warming is experienced.

Summary

Confidence

Moderate - Freezing levels are uncertain

Weather Forecast

THURSDAY NIGHT - Mainly cloudy / northwest winds, 20-30 km/h / alpine low temperature near -2 / freezing level 900 m / alpine temperature inversionFRIDAY - Mainly cloudy / northwest winds, 20-40 km/h / alpine high temperature near +2 / freezing level 1500 m / alpine temperature inversionSATURDAY - A mix of sun and cloud / north west winds, 20-40 km/h / alpine high temperature near +6 / freezing level 3000 m SUNDAY - A mix of sun and cloud / northwest winds, 40-60 km/h / alpine high temperature near +4 / freezing level 2500 m

Avalanche Summary

Several natural and explosives triggered avalanches to size 2, and one human triggered size 1 avalanche were reported in the region on Wednesday.A few size 1 explosives triggered avalanches were reported in the region on Tuesday.

Snowpack Summary

40-60cm of recent storm snow likely sits on a sun crust on south facing slopes and surface hoar (feathery crystals) in sheltered and shaded areas. The surface hoar is reportedly most prominent at treeline and below. A sun crust likely exists on the surface on south facing slopes at all elevations.

Problems

Persistent Slabs

40-60 cm of recent snow sits on a weak layer that may be still be reactive, especially in wind loaded areas and as temperatures rise.

Watch for signs of instability, such as whumpfing, cracking, or recent avalanches.Be careful with wind loaded pockets, especially near ridge crests and roll-overs.Watch for clues, like sluffing off of cliffs, that the snowpack is warming up.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Jan 25th, 2019 2:00PM