Avalanche Forecast
Avalanche Bulletin - Glacier National Park
Refrozen surface snow below treeline will provide a smooth surface for avalanches triggered in the alpine. Reactive windslabs may run farther than expected.
Watch out for solar triggered avalanches when the strong spring sun shines.
Avalanche Problem 1: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
- Even small avalanches may run a long ways under the current conditions.
Avalanche Summary
A natural avalanche cycle accompanied this morning's strong winds. Several large size 2-3 avalanches were observed in the highway corridor east of Rogers Pass from steep terrain on Mt Tupper and Mt MacDonald. These slides ran into the valley bottom, assisted by the smooth surface crust at lower elevations.
Snowpack Summary
Strong south winds overnight contributed to loading and wind slab formation in the alpine. Yesterday's freezing level climbed to 2300m, creating a melt-freeze crust on the surface. Isolated surface hoar has been found in protected areas down 20cm. The snowpack is moist blow treeline and is being held together by several near surface crusts.
Weather Forecast
A mix of sun and cloud today with an alpine high of -7 and freezing levels hovering around 1200m. Moderate southerly winds will continue. Expect the weather to be unsettled, with convective cells bringing scattered flurries or rain showers at lower elevations. Snowfall amounts between trace and 5cm.
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Strong southerly winds contributed to a natural avalanche cycle this morning. Lingering windslabs are present on most aspects in the alpine. Windslabs are likely to propagate where they overlie buried curst on solar aspects and isolated surface hoar.