| Abbreviation | Definition |
|---|---|
| NATO | North Atlantic Treaty Organization |
| NAV | North America Vertical |
| NAVAF | Navy- Air Force |
| NAVICECEN | Naval Ice Center |
| NAVOCEANO | Naval Oceanographic Office |
| NAWPC | National Aviation Weather Program Council |
| NAWPP | National Aviation Weather Program Plan |
| NBP | NOx Budget Program |
| NC | NOAA Corps Operations |
| NCAR | National Center for Atmospheric Research |
| NCDC | National Climatic Data Center |
| NCEP | National Center for Environmental Prediction |
| NCFR | Narrow Cold Frontal Rainband |
| NCM | Norwegian Cyclone Model |
| NCO | NCEP Central Operations |
| ND | No Depression |
| NDACC | Network for the Detection of Atmospheric Composition Change |
| NDAO | Namib Desert Atmospheric Observatory |
| NDBC | National Data Buoy Center |
| NDFD | National Digital Forecast Database |