Which advisory is used for non-convective weather conditions?

The Non-Convective SIGMET is specifically designed to address conditions that can adversely affect flight safety but are not related to convective weather phenomena. This includes phenomena such as widespread areas of turbulence, icing, or low-level wind shear, as well as significant visibility reductions due to weather conditions like fog, dust storms, or smoke.

The purpose of the Non-Convective SIGMET is to provide pilots with critical information to make informed decisions during flights when facing adverse weather that does not involve thunderstorms or convective activity. It is an essential advisory for maintaining safety and situational awareness in challenging weather scenarios.

In contrast, advisories like Convective SIGMET are focused exclusively on convective weather, such as thunderstorms. Severe Weather Forecast Alerts are broader but are not specifically tailored to the non-convective conditions that Non-Convective SIGMETs cover. Lastly, AIRMETs, although they do provide guidance for certain weather conditions, are typically used for less severe weather impacts and focus on specific types of phenomena like turbulence, icing, and visibility.