What weather conditions are indicated by a low-level temperature inversion with high relative humidity?

A low-level temperature inversion with high relative humidity typically leads to specific weather phenomena. During a temperature inversion, the temperature increases with altitude in a layer of the atmosphere, which can trap cooler air and pollutants near the surface. When high relative humidity is present, it often results in the formation of fog, haze, or low clouds. This occurs because the moisture in the cooler air condenses into tiny water droplets, significantly reducing visibility.

Consequently, the combination of these factors — smooth air at lower altitudes due to the stable conditions caused by the inversion, alongside the presence of high humidity resulting in misty or cloudy conditions — creates an environment where visibility can be very poor and conditions are generally characterized by calm or smooth air. In contrast, the other options depict scenarios that do not align with the effects of a low-level temperature inversion combined with high humidity; they suggest clear skies, turbulence, or stormy weather, which are not characteristics associated with such stable and moist conditions.