Are There Specific Signs To Watch For Before An Avalanche?

Identifying High-Risk Snow Conditions

Identify areas with recent snowfall, typically within the past 24 to 48 hours, as these locations may have unstable snowpack. Look for signs like recent avalanches, collapsing snow bridges, or whumping sounds (a low-pitched, hollow sound). Also, be aware of terrain features such as steep slopes, gullies, and cornices, which are more prone to avalanches.

Reading Avalanche Terrain

When assessing the terrain, pay attention to slope angles, typically above 30 degrees, where avalanches are more likely to occur. Also, note the presence of weak layers, such as old snow or surface hoar, which can be easily triggered by human activity. Use a probe to test the snow’s strength by inserting it vertically into the slope and gently tugging on it.

Recognizing Warning Signs

Be aware of changes in weather patterns, such as rising temperatures, strong winds, or recent precipitation, which can indicate unstable snow conditions. Watch for signs of recent avalanche activity, such as recent slides, scarred terrain, or snow debris. Always carry a transceiver, probe, and shovel, and know how to use them in case of an emergency.