Acronym |
Definition |
| XDW | eXtreme Damaging Wind |
| XWC | eXtreme Wind Conditions |
| XWX | Extreme Weather |
| XYP | X-Y Plotter |
| XYR | X-Y Recorder |
| YRO | Year- Round Operations |
| YYYY | Four-digit year date |
| ZAP | Zonal Advisory Process |
| ZDC | Zero Degree Calorimeter |
| ZHR | Zenithal Hourly Rate |
| ZIF | Zero Incident Frequency |
| ZM | Zero Momentum |
| ZTD | Zenith Tropospheric Delay |
| ZTH | Zones Tropicales Humides |
| ZTM | Zope Topic Map |
| ZW | Zonal Wave |
| ZWP | Zero Water Peak |
| ZY-1 | ZiYuan-1 |
| ☁ | Cloud |
| ☇ | Lightning |
| ☈ | Thunderstorm |
| ☉ | Sun |
| ☌ | Day |
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