Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Avalanche control is planned for Parker ridge area in late afternoon on Wednesday. Check Alberta 511.
Avalanche Problem 1: Loose Wet
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- If triggered the loose wet sluffs may step down to deeper layers resulting in large avalanches.
- Use extra caution on solar slopes or if the snow is moist or wet.
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Triggering this slab would have serious consequences. Cornice failures are acting as triggers.
Travel and Terrain Advice
- If triggered the loose wet sluffs may step down to deeper layers resulting in large avalanches.
- Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.
Avalanche Problem 3: Cornices
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Rising temperatures are causing cornices to fall triggering slopes below. Give them a wide berth.
Travel and Terrain Advice
- Avoid steep slopes below cornices.
- Pay attention to overhead hazards like cornices which could easily trigger persistent slabs.
Avalanche Summary
Tuesday observed a few loose wet avalanches below treeling up to the low alpine. Also a couple of fresh size 2-2.5's slabs were noted in the alpine. The mountains are waking up with the rising temperatures.
Snowpack Summary
Sun or temperature crusts extend to treeline and into the alpine on southerly slopes. Persistent slabs can be found on most aspects at treeline and above. These have been reactive to large triggers like cornice failures. Below 1,900m the snowpack is going isothermal on a daily basis.
Weather Forecast
This week will be sunny and very warm. Wednesday will be 2600m freezing level but then rise up to 3500m Thursday and Friday.
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The next few nights and days will be progressively warmer increasing the probability of loose wet avalanches. Start and end early plus be vigilant of overhead hazard as these avalanches have been gaining mass and running far.