Hazardous inflight weather advisories primarily contain which group of products?

• A. Storm reports, advisories, and Center Weather Advisories
• B. AIRMETs, SIGMETs, and Convective SIGMETs
• C. NOTAMs and PIREPs
• D. METARs and TAFs

Answer: (B)

Inflight weather advisories are meant to warn pilots about weather hazards that can affect aircraft in flight. The primary set of products used for this purpose includes AIRMETs, SIGMETs, and Convective SIGMETs. AIRMETs cover less severe but widespread phenomena (like moderate icing, moderate turbulence, or IFR/low visibility conditions) that can affect a broad area and many flights. SIGMETs flag more significant hazards that could affect all aircraft, such as severe icing, severe or extreme turbulence, clear air turbulence, and widespread dust or sand storms, or mountain obscuration. Convective SIGMETs focus specifically on severe convective weather, including strong thunderstorms, line convective systems, embedded thunderstorms, and tornadoes—conditions that can rapidly impact flight safety.

The other options don’t represent the primary inflight hazard advisories. NOTAMs and PIREPs are observations and reports rather than the forecast/alert products issued to warn about ongoing or upcoming weather hazards. METARs and TAFs are surface observations and short-term forecasts, not the hazard advisories designed to guide in-flight planning and routing.