How are "low-level winds" indicated in a METAR report?

In a METAR report, low-level winds are indicated by using the wind direction and speed. This information is essential for pilots and meteorologists as it provides insight into the characteristics of the wind at the lower altitudes, which can significantly affect aircraft performance during takeoff, landing, and navigation.

Wind direction is typically expressed in degrees, indicating where the wind is coming from, while speed is often given in knots. For example, if a METAR report states "22015KT," it means the wind is coming from 220 degrees at a speed of 15 knots. This data helps to determine the best flight paths and assess weather conditions for flight safety and efficiency.

The other options do not pertain specifically to low-level winds. Temperature and humidity relate to atmospheric conditions but do not provide direct information about wind. Cloud coverage indicates the presence and extent of clouds, which can affect visibility and weather patterns, but does not define wind characteristics. Visibility conditions relate to how far one can see and are important for flight operations but are separate from wind information. Hence, the correct choice focuses on the critical details of wind direction and speed, which are pivotal for understanding low-level winds in aviation.