Wind data from dual parallel runways can be reported in the remarks section of a METAR or SPECI observation whenever a 6-knot sustained or gust speed difference exists between the active end wind sensors. Example: WND RWY 32R 300/10G15KT. This corresponds to which remark category?

• A. Wind data from dual parallel runways.
• B. Supplementary Data for an Inactive or Parallel Runway.
• C. Supplementary RVR data.
• D. Aircraft Mishap.

Answer: (B)

When a METAR/SPECI includes wind data for dual parallel runways, it uses a special remark category to flag that the wind information for the parallel runway may differ from the active end. This category is “Supplementary Data for an Inactive or Parallel Runway,” and it’s used specifically when there is a difference of at least 6 knots in sustained or gust wind speeds between the active-end sensors. The example wind remark, such as WND RWY 32R 300/10G15KT, shows the wind for the parallel runway being reported in the remarks to alert users to that discrepancy. It’s not about RVR or an accident; those other options refer to unrelated data or events.