Question

When can wind data from dual parallel runways be reported in the remarks section of a METAR or SPECI observation?

1) When there is a 6-knot sustained or gust speed difference between the active end wind sensors
2) When there is a significant or unusual variation in the sky condition
3) When there is a 10-knot sustained or gust speed difference between the active end wind sensors
4) When there is a reported PIREP about the sky condition affecting flying operations

Answer 1

Wind data from dual parallel runways is included in a METAR or SPECI report when there is a 10-knot sustained or gust difference between the active end wind sensors. This helps inform pilots about potential wind conditions affecting takeoff and landing.

Step-by-step explanation:

Wind data from dual parallel runways is an important element for airport operations and can significantly affect aviation safety. According to aviation standards, such wind data can be reported in the remarks section of a METAR or SPECI observation when there is a 10-knot sustained or gust speed difference between the active end wind sensors. This is essential to inform pilots about the conditions they may encounter upon landing or takeoff.

This criterion is not related to unusual variations in sky condition, PIREPs concerning the sky condition affecting flying operations, or lower differences in wind speed. Understanding wind's speed and direction is crucial for operations, such as the significant effect on the total velocity of planes.