| Abbreviation | Definition |
|---|---|
| NOGAPS | Navy Operational Global Atmospheric Prediction System |
| NOLC | Non-Overlapped Low-level Clouds |
| NOR | No Ratio |
| NORA | Natural Observation Research Activator |
| NORAPS | Navy Operational Regional Atmospheric Prediction System |
| NOS | National Ocean Service |
| NOTAM | Notice to Airmen |
| NOWS | NVG Operations Weather Software |
| NP | North Point |
| NPL | NOAAPORT Liaison |
| NPMOC | Naval Pacific Meteorology and Oceanography Center |
| NPOESS | National Polar-orbiting Operational Environmental Satellite System |
| NPS | National Park Service |
| NPSS | Numerical Propulsion System Simulation |
| NR | No Rain |
| NRCS | Natural Resources Conservation Service |
| NRF | Northwest Regional Forecast |
| NRL | Naval Research Laboratory |
| N-ROSS | Navy Remote Sensing Satellite |
| NS | Non Scheduled |