| Abbreviation | Definition |
|---|---|
| FWF | Fleet Weather Facility |
| FWI | False Wind Induction |
| FWL | Flood Water Level |
| FWX | Fairweather (not an acronym) |
| FX | Forecast |
| FZFG | Freezing Fog |
| GA | Google Answers |
| GADS | Global Aerosol Data Set |
| GAF | Graphical Area Forecast |
| GAIN | Global Aerosol Information Network |
| GAPP | GEWEX Americas Prediction Project |
| GARP | Genetic Algorithm for Rule-set Production |
| GASP | Group Against Smog And Pollution |
| GAW | Global Atmosphere Watch |
| GCC | Global Climate Coalition |
| GCCA | Global Climate Change Alliance |
| GCCD | Global Climate Change Digest |
| GCCM | Global Chemistry Circulation Model |
| GCCM | Global Chemistry Climate Model |
| GCCN | Giant Cloud Condensation Nuclei |