Jasper National Park Avalanche Forecast
Jul 29th, 2019 4:00PM
This Summer has been exceptionally snowy in the Alpine; heightened avalanche hazard remains. Use our Weather Stations, the Mountain Conditions Report, and the Mountain Information Network for conditions, or ask for Visitor Safety at 780-852-6155
An overview is available: https://www.avalanche.ca/pages/static-page/spring-conditions
Generally, danger increases with daytime warming, & decreases with cold, clear nights. As the snow thins, crevasse bridges weaken. Use extra care in thin wind-affected areas, eg the Athabasca Glacier.
Avalanches have occurred into the end of July on the high peaks. Activity increases with rising temps, especially during warm and/or sunny afternoons. Use extra caution if the surface hasn't refrozen overnight - clear nights help. Watch for Wind Slabs in the alpine, particularly following snow or rain. Use extra caution if these form above crusts.
When the sun comes out, temperatures soar above freezing, or rain falls, expect Wet Loose avalanches. This is especially relevant in steep, high consequence terrain, such as gully climbs on Mt. Andromeda, Mt. Edith Cavell and Mt Woolley/Diadem.
- Use caution above cliffs and terrain traps where small avalanches may have severe consequences.
- Avoid snow face or gully climbs that are catching sun, or after rain.
Watch out for large cornices still present at ridge top.
- Travel early before the heat of the day. Minimize travel below slopes threatened by cornices.
Any new snow falling high in the Alpine can quickly become Wind Slabs at any time of the year. This has been a problem in the past on terrain like the Silverhorn and Ramp routes on Mt. Athabasca, and on other high peaks, such as Mt. Columbia.
- Watch for signs of instability such as whumpfing, or cracking.
- New snow will require several days to settle and stabilize.
Valid until: Jul 30th, 2019 4:00PM