| Abbreviation | Definition |
|---|---|
| CNMOC | Commander Naval Meteorology and Oceanography Command |
| COADS | Comprehensive Ocean Atmosphere Data Set |
| COAMPS | Coupled Oceanographic and Atmospheric Model |
| COARE | Coupled Ocean-Atmosphere Response Experiment |
| COD | Cloud Optical Depth |
| COE | Corps Of Engineers |
| COMEDS | CONUS Meteorological Data System |
| COMET | Cooperative program for Operational Meteorology, Education, and Training |
| COMS | Communication Ocean and Meteorological Satellite |
| CONUS | Continental United States |
| COP | Chance Of Precipitation |
| COPC | Committee for Operational Processing Centers |
| CORS | Continuously Operating Reference Station |
| COTS | Coastal Observation Technology System |
| COTS | Commercial Off The Shelf |
| CP | Center of Pressure |
| CP | Continental Polar |
| CPAP | Continuous Positive Air Pressure |
| CPC | Climate Prediction Center |
| CPMC | Cirrus Parcel Model Comparison |