Avalanche Forecast

Archived

Nov 12th, 2025–Nov 13th, 2025

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches possible, human triggered probable.

Below Treeline

Early Season

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches possible, human triggered probable.

Below Treeline

Early Season

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Early Season

Regions

Jasper, Brazeau, Churchill, Cirrus-Wilson, Fryatt, Icefields, Maligne, Marmot, Miette Lake, Pyramid.

New snow and wind on Thursday will form a storm slab, watch for rapidly changing conditions.

Confidence

Moderate

Avalanche Summary

A natural size 1 avalanche occurred on Parkers from a glide slab on Wednesday.

Snowpack Summary

How to navigate Early Season Conditions

New snow will be falling on a variable snowpack. Recent extreme winds that scoured much of the alpine also deposited snow into gullies and lee features creating windslabs and variability in snow depth. There is approximately 50-100cms of snow in the alpine, 50cms at treeline, and 30cm below treeline. Early season hazards exist just below the surface.

Weather Summary

A storm is forecasted to arrive Thursday bringing up to 30cm to the Parkway and more (possibly up to 50cm) in some high elevation areas by Friday. Moderate, gusting strong winds will accompany the precipitation and freezing levels are expected to rise to 1800m.

For updated forecasts go to Jasper National Park Forecast.

Terrain and Travel Advice

Be careful as you transition into wind-affected terrain.
Watch for fresh storm slabs building throughout the day.

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.

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.