Which weather product would you consult to identify potential thunderstorm activity along your route?

• A. AIRMETs
• B. NOTAMs
• C. Convective SIGMETs
• D. SIGMETs (non-convective)

Answer: (C)

Convective weather hazards require a product that focuses on thunderstorm activity. Convective SIGMETs are issued when thunderstorms pose significant flight hazards and are specifically designed to alert pilots to thunderstorm activity, including lines or clusters of storms, embedded cells, or severe elements like strong winds or large hail. They provide the affected area, the storm’s current location, movement, and forecast position, so you can plan to route around or avoid the activity.

AIRMETs describe more moderate weather hazards (such as moderate turbulence or icing) and aren’t centered on thunderstorms. NOTAMs are notices about airspace or facility status, not weather. SIGMETs for non-convective phenomena cover hazards like severe icing or turbulence that aren’t due to convection, so they don’t pinpoint thunderstorm activity. So the best choice to identify potential thunderstorm activity along a route is convective SIGMETs.