Pilot Your Dreams: Conquer the FAA Ground School Exam 2025!

A small temperature/dew point spread indicates a high level of moisture in the air. This phenomenon is typically associated with the formation of fog or low clouds. When the temperature and dew point are close together, it implies that the air is near saturation, which can lead to condensation if the air cools slightly. This process results in the formation of fog or low clouds, making the atmosphere less stable and more humid.

In contrast, the other weather conditions mentioned generally do not align with a small temperature/dew point spread. For instance, clear skies and low humidity would correspond to a larger spread, where the air is drier, warm, and able to hold more moisture without condensing. An approaching storm might be indicated by varying temperature and moisture characteristics, but not typically with a small spread, as storm systems often have different atmospheric dynamics. Strong winds and high pressure are also associated with clear conditions and not the dense moisture presence indicated by a small spread. Thus, the correct implication of a small temperature/dew point spread is fog or low cloud formation.