SIGMETs

Like PIREPs , SIGMETs is a combination of Significant Meteorlogical hazards, which are inflight weather advisories for pilots covering a certain area. These serve as alerts for things such as convection (thunderstorms), turbulence, icing, and visibility, and can be viewed on aviationweather.gov . Look for TURB or CONV sigmets as indicators of potentially bumpy/turbulent areas of your flight, and plan your beverage orders accordingly.