Appendix 8 Ranges and resolutions for the numerical elements included in volcanic ash advisory, tropical cyclone advisory, SIGMET, AIRMET, aerodrome warning and wind shear warningF1
United Kingdom
Non-dimensional.; | |||
| Elements | Range | Resolution | |
|---|---|---|---|
| Summit elevation: | M | 000–8 100 | 1 |
| FT | 000–27 000 | 1 | |
| Advisory number: | for VA (index) f1 | 000–2 000 | 1 |
| for TC (index) | 00–99 | 1 | |
| Maximum surface wind: | MPS | 00–99 | 1 |
| KT | 00–199 | 1 | |
| Central pressure: | hPa | 850–1 050 | 1 |
| Surface wind speed: | MPS | 15–49 | 1 |
| KT | 30–99 | 1 | |
| Surface visibility: | M | 0000–0750 | 50 |
| M | 0800–5 000 | 100 | |
| Cloud: height of base: | M | 000–300 | 30 |
| FT | 000–1 000 | 100 | |
| Cloud: height of top: | M | 000–2 970 | 30 |
| M | 3 000–20 000 | 300 | |
| FT | 000–9 900 | 100 | |
| FT | 10 000–60 000 | 1 000 | |
| Latitudes: | ° (degrees) | 00–90 | 1 |
| (minutes) | 00–60 | 1 | |
| Longitudes: | ° (degrees) | 000–180 | 1 |
| (minutes) | 00–60 | 1 | |
| Flight levels: | 000–650 | 10 | |
| Movement: | KMH | 0–300 | 10 |
| KT | 0–150 | 5 | |
Annotations
Textual amendments
Footnotes
- f1
Non-dimensional.;