| Abbreviation | Definition |
|---|---|
| VORTEX | Verification of the Origins of Rotation Experiment |
| VOS | Voluntary Observing Ship |
| VP | Visibility Period |
| VPD | Vapor Pressure Deficit |
| VRAC | Very Rare Atmospheric Condition |
| VSD | Variable Sized Droplet |
| VSH | Volcano ash clouds |
| VT | Variable Temperature |
| VTEC | Valid Time Event Code |
| VWM | Virtual WeatherMan |
| VWP | VAD Wind Profile |
| VWS | Virtual Weather Station |
| VWX | Visual Weather report |
| W/W | Weight to Weight ratio, % percentage by weight |
| WA | Warm Air |
| WAAS | Wide Angle Augmentation System |
| WABN | Weather Audio Broadcast Network |
| WAC | World Aeronautical Chart |
| WADI | Dry riverbed that only contains water during times of heavy rain |
| WALE | West Arctic Linkage Experiment |