Which phenomena will be reported if observed within 10 minutes of the actual time of the observation?

• A. Gusts Only
• B. Squalls Only
• C. Gust and Squalls
• D. No Change

Answer: (C)

In aviation weather observations, wind-related phenomena are captured within a 10-minute window around the actual observation time to ensure timely and meaningful reporting. Gusts are brief, rapid increases in wind speed above the prevailing wind, while squalls are sudden, marked increases in wind speed (lasting at least a minute and often linked to showers or storms).

If you observe both gusts and squalls within that 10-minute window, you would report both, because they each represent distinct, notable changes in wind that can affect aircraft performance and safety. If neither phenomenon occurs within that window, there’s no change to report. So the best choice is that both gusts and squalls are reported when observed within the 10-minute window.