| Abbreviation | Definition |
|---|---|
| SMN | Servicio Meteorológico Nacional |
| SMOG | Small Motorcycle Owners Group |
| SMOOS | Shipboard Meteorological And Oceanographic Observing System |
| SMP | Salinity Management Program |
| SMS | Space Meteorological Satellite |
| SMW | Standard Meteorological Week |
| SMY | Solar Maximum Year |
| SNOTEL | Snow Telemetry |
| SNW | Snow |
| SNY | Snowy |
| SNY | Sunny |
| SOAR | Support Office For Aerogeophysical Research |
| SOC | Storm Of The Century |
| SODAR | SOnic Detection And Ranging |
| SOG | Study Observation Group |
| SOGS | Surface Observations Gridding System |
| SOLAR | Student On Line Academic Registration |
| SOM(s) | self-organizing map(s) |
| SORP | Statement Of Recommended Practice |
| SPAWAR | Space and Naval Warfare Systems Command |