Which of the following is NOT a condition that may indicate the presence of wind shear?

Wind shear is a sudden change in wind speed and/or direction over a short distance in the atmosphere. It can significantly impact aviation by altering flight dynamics, especially during takeoff and landing.

The presence of a low-level temperature inversion indicates that warm air is trapped over cooler air, which can create stable conditions that are conducive to the development of wind shear, particularly if there are winds at different altitudes. Similarly, a frontal zone represents a boundary between two air masses with different temperatures and densities, which can lead to wind shear as these masses interact. Clear air turbulence (CAT) typically occurs in the absence of visual cues like clouds, often near jet streams, and can signify significant changes in wind speed and direction over short distances.

In contrast, consistent wind direction reflects a steady-state condition rather than the variations associated with wind shear, making it the correct response to the question. Consistent wind direction indicates a uniform flow of air without significant shifts that would be indicative of wind shear. Understanding these concepts is crucial for predicting and managing the risks associated with wind shear in aviation operations.