An AIRMET is an advisory that includes hazardous weather phenomena for light aircraft.
SIGMETs are inflight advisories concerning nonconvective weather that is potentially hazardous to all aircraft.
A Convective SIGMET is issued for thunderstorms.
A convective outlook primarily indicates the forecast for severe storms or convective activity.
A METAR is an observation of current surface weather reported in a standard format.
A Terminal Aerodrome Forecasts (TAF) is a weather forecast for the five-statute mile radius around an airport.
The Aviation Discussion is a text interruption from a meteorologist of the local weather conditions.
Pilot weather reports (PIREPS) are weather observations provided by pilots.