| Abbreviation | Definition |
|---|---|
| SPD | Supplemental Precipitation Data Product |
| SPECI | Aviation Selected Special Weather Report |
| Special | A form of weather advisory for hazards that have not yet reached warning or advisory status or that do not have a specific code of their own. |
| SPECIAL | Space Processes and Electrical Changes In Atmospheric Layers |
| SPF | Skin Protection Factor |
| SPH | Smooth Particle Hydrodynamics |
| SPL | Sound Pressure Level |
| SPO | South Pole Observatory |
| SPOSC | Shared Processing Operations Steering Committee |
| SR | Savannah River |
| SRA | Seasonal Rainfall Amount |
| SRBL | Solar Radio Burst Locator |
| SRDC | Surface Reference Data Center |
| SRH | Southern Region Headquarters |
| SRH | Storm relative Helicity |
| SRM | Storm Relative Map |
| SRS | Savannah River Site |
| SS | Subtropical Storm |
| SSDC | Space and Strategic Defense Command |
| SSE | Surface meteorology and Solar Energy |