| Abbreviation | Definition |
|---|---|
| NIFC | National Interagency Fire Center |
| NIR | Near Infra Red |
| NIR | Near Infra-Red |
| NITES | Naval Integrated Tactical Environmental Subsystem |
| NL | Northern Lights |
| NLMOC | Naval Atlantic Meteorology and Oceanography Center |
| NMAS | National Marine And Atmospheric Society |
| NMC | National Meteorological Center |
| NMHS | National Meteorological and Hydrological Service |
| NMHS | National Meteorological and Hydrological Services |
| NMOC | Naval Meteorology and Oceanography Command |
| NMP | New Millenium Program |
| NMS | national meteorological service |
| NMTN | National Telecommunications Network |
| NMU | Navy Meteorological Unit |
| NMUB | Normalized Mean Upper Bound |
| NOA | North Atlantic Oscillation |
| NODC | National Oceanographic Data Center |
| NODDES | Naval Oceanographic Data Distribution and Expansion System |
| NODDS | Naval Oceanographic Data Distribution System |