Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Mar 17th, 2022–Mar 18th, 2022

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Lizard-Flathead.

Wind slab avalanches are possible at upper elevations. Pay attention to changing conditions with elevation and aspect. 

Confidence

High - The snowpack structure is mostly striaghtforward and not unusually variable.

Weather Forecast

THURSDAY NIGHT: Cloudy with scattered flurries bringing up to 5 cm of new snow, moderate wind from the southwest with gusts to 60 km/h, treeline temperatures drop to -5 with freezing level around 1200 m.

FRIDAY: Mostly cloudy with some light flurries bringing trace amounts of snow, moderate wind from the southwest, treeline temperatures around -2 C with freezing level around 1700 m.

SATURDAY: Mostly cloudy with flurries starting midday brining trace amounts of snow in the afternoon, light wind from the southwest, treeline temperatures around -1 C with freezing level around 1800 m.

SUNDAY: Cloudy with flurries bringing 5 to 10 cm of snow overnight, sunny periods in the afternoon, light wind from the west, treeline temperatures around -4 C with freezing level around 1500 m.

Avalanche Summary

Avalanche activity has declined since a natural cycle occurred during Tuesday's storm. The cycle involved many size 2 storm slab avalanche at upper elevations and wet loose avalanches below treeline. Storm snow was still reactive to explosives on Wednesday and Thursday, but looking forward avalanches will be most likely on wind-loaded slopes.

Snowpack Summary

Recent snowfall amounts taper with elevation. There is 20 to 30 cm of heavy powder at upper elevations, while warm temperatures have left moist and crusty surfaces below roughly 1700 m. The upper snowpack contains several crust layers, and the snow is well bonded these crusts.

Terrain and Travel

  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Investigate the bond of the recent snow before committing to your line.
  • Be alert to conditions that change with elevation, aspect and exposure to wind.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.