Which weather condition could indicate potential avalanche risk?

Strong winds are a significant indicator of potential avalanche risk. When winds are high, they can transport and redistribute snow across slopes, leading to the formation of unstable snowpack layers. This can create areas of wind loading, where snow accumulates excessively on certain parts of a slope. If the underlying layers of the snowpack are weak or have not bonded well, these wind-loaded areas can fail, resulting in an avalanche.

In contrast, while high temperatures, low visibility, and heavy rainfall can affect snow conditions and contribute to avalanche risks, they do not directly relate to the immediate risk factors associated with the formation of unstable snowpacks as strongly as strong winds do. High temperatures can lead to melting, low visibility can hinder navigation, and heavy rainfall can influence snow consolidation; however, it is the action of strong winds that often creates the most immediate and dangerous instability in snowpack conditions.