Jasper

Warming over the next few days will increase overhead hazards. Expect rockfall and cornice fall capable of triggering deep persistent weak layers.
Moist surface snow at and below tree line may produce loose wet avalanches—use extra caution in terrain traps.

Moderate

• We are uncertain due to variable freezing levels.

We are still seeing sporadic large natural persistent slab avalanches. Loose wet natural avalanche cycle up to size 2 at tree line and below is ongoing with higher freezing levels.

Dry snow can still be found in shady aspects above tree line. 20-40 cm below, a firm rain crust from late March is supportive at low elevations but gradually disappears above tree line, around 2300 m. A deeper persistent weak layer from late January exists in the alpine down 80–120 cm. The lower snowpack is generally strong although weak basal facets can still be found in shallow areas.

Monday
Cloudy with scattered wet flurries. Accumulation: 5 cm. Alpine temperature: High 2 °C. Ridge wind southwest: 15 km/h gusting to 70 km/h. Freezing level: 2400 metres.

Flurries. Accumulation: 7 cm. Alpine temperature: Low -10 °C, High 2 °C. Ridge wind west: 20 km/h gusting to 65 km/h. Freezing level: 2300 metres.

A mix of sun and cloud with isolated flurries. Precipitation: Trace.

Alpine temperature: Low -12 °C, High -4 °C. Mostly light ridge wind occasionally gusting to 40 km/h. Freezing level: 1700 metres.

• Keep in mind that human triggering may persist as natural avalanches taper off.
• Cornice failures could trigger large and destructive avalanches.
• Rocks will heat up with daytime warming and may become trigger points for loose wet avalanches.