What is an unscheduled weather advisory issued for ATC use to alert pilots of existing or anticipated adverse weather conditions within the next 2 hours?

• A. AIRMET
• B. SIGMET
• C. NOTAM
• D. CWA

Answer: (D)

Convective Weather Advisory is the weather notice ATC uses to summarize existing or developing convective activity that could affect flight within the next two hours. It’s issued as an unscheduled advisory to help controllers coordinate traffic and provide timely weather context to pilots. AIRMETs cover more general, less severe conditions and are issued on a set schedule for broader minimums; SIGMETs (including convective SIGMETs) are for significant weather hazards and have their own specific validity and audience, not specifically the ATC-focused 2-hour advisory used for convective activity. NOTAMs are not weather advisories. So the description fits a Convective Weather Advisory.