What conditions lead to wind shear?

Wind shear refers to a sudden change in wind speed or direction over a relatively short distance in the atmosphere. This phenomenon can occur at various altitudes, but it is particularly prevalent near airports and during thunderstorms. Rapid changes in wind speed or direction can create hazardous conditions for aircraft, especially during takeoff and landing.

When considering the conditions that lead to wind shear, the presence of thunderstorms is a key factor. Thunderstorms can produce strong downdrafts and gust fronts that significantly alter the wind's characteristics. Similarly, the approach phase of flight near an airport can often experience wind shear due to the interaction of different wind patterns, terrain, or nearby weather systems.

The other options present conditions that may influence flight but do not specifically address the rapid changes in wind characteristics that define wind shear. Steady winds in high-altitude regions may not involve significant changes in wind behavior, low visibility may complicate navigation and safety during approach, and increased humidity with temperatures alone does not create the sudden wind shifts characteristic of wind shear. Therefore, the rapid changes in wind speed or direction are what clearly identify the correct response regarding the conditions that lead to wind shear.