| Abbreviation | Definition |
|---|---|
| NSCAT | NASA Scatterometer |
| NSIDC | National Snow and Ice Data Center |
| NSSA | National Storm Shelter Association |
| NSSFC | National Severe Storms Forecast Center |
| NSSL | National Severe Storms Laboratory |
| NSTC | National Science and Technology Council |
| NSW | No Significant Weather |
| NSWP | National Space Weather Program |
| NTD | No Turbulent Drop |
| NTS | National Topographic System |
| NTS | Nevada Test Site |
| NTSB | National Transportation Safety Board |
| NV | Nevada Operations Office |
| NVA | Negative Vorticity Advection |
| NVDS | NOAA Virtual Data System |
| NVG | Night Vision Goggle |
| NW | Non Winter |
| NWA | The National Weather Association |
| NWCC | National Water and Climate Center |
| NWCP | Numerical Weather and Climate Prediction |