SIGWXSignificant Weather (weather forecasts)
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After a public comment period begun in 2014, the FAA and NWS determined the FA resulted in "a broad forecast of limited value." The NWS said it "provides equivalent information through a number of better alternatives," including "more-modern digital and graphical forecasts, observations, and communications capabilities." The NWS added that existing alternatives to the FA include surface weather analyses and prognostic charts, significant weather (SIGWX) charts, terminal aerodrome forecasts (TAFs) and Airmets.
The forecasters at the AWC issue convective SIGMETs, AIRMETs and SIGMETs as well as the area forecast (FA) and high- and low-altitude SIGWX products.