Glacier National Park Avalanche Forecast
Issued: Apr 10th, 2021 8:00AM
Winter weather maintains its grip on Rogers Pass. The refresh of powder also brings a storm instability that requires careful terrain selection to avoid heavily loaded areas. Watch for loose avalanches if the sun comes out.
Moderate snow will continue today with 7cm of accumulation. Alpine high will reach -9, W winds 25-45km/h, freezing level at 1000m. A high pressure system builds later this evening with a return to clear skis and cool overnight temps of the coming week. Sun and daytime warming will bring spring conditions. Freezing levels rise sharply on Wednesday.
15cm of new snow fell overnight with strong S winds. Storm/ wind slabs cover a variety of old surfaces: settled powder on sheltered alpine N aspects, wind slabs/ wind pressed surfaces in exposed areas, a sun crust on solar aspects, and spring melt/freeze crust below treeline. Cornices are large and fragile. The March 18 crust is buried ~80-100cm.
A field crew was able to ski cut several small size 1.0 thin wind slabs while descending Macdonald West Shoulder #4. Two large glide releases (size 4 and size 3) released earlier this week in the highway corridor off of Mt Tupper.
15cm of new snow with strong winds and ongoing precipitation has created a storm instability at higher elevations. Wind loaded areas will be more susceptible to triggering. New snow conceals existing wind slabs that can still be triggered.
- Watch for shooting cracks or stiffer feeling snow. Avoid areas that appear wind loaded.
Natural cornice failures have been observed over the past several days. Cornice problems are notoriously difficult to forecast for. Keeping distance between cornices and associated runout zones is good strategy for safe spring travel.
- Extra caution needed around cornices with current conditions.
Aspects:North, North East, East, North West.
Valid until: Apr 11th, 2021 8:00AM
The latest forecast danger ratings, broken down to elevation. See how an elevation is trending.