For how long after the last report or indication of wind shear/microburst, should an advisory statement be included on the ATIS?

• A. 5 min
• B. 10 min
• C. 20 min
• D. 30 min

Answer: (C)

Wind shear and microburst effects can linger even after the last report or indication, so the ATIS advisory should stay in place for twenty minutes after that final observation. This window gives pilots time to encounter the remaining hazard as storms move and winds gradually normalize, which is especially important during approach and departure phases. If the advisory were shorter, crews might face conditions that weren’t yet over, while a longer duration could lead to relying on outdated information. Twenty minutes strikes a practical balance, providing timely warning without overstaying beyond the period when the hazard is most likely to affect operations.