AppendixAppendix
Appendix 7
| Template for advisory for tropical cyclones Key: M = inclusion mandatory; C = inclusion conditional, included whenever applicable; O = inclusion optional; = = a double line indicates that the text following it should be placed on the subsequent line. Note 1: The ranges and resolutions for the numerical elements included in tropical cyclone advisory are shown in Appendix 8. Note 2: The explanations for the abbreviations can be found in ICAO Doc 8400 Procedures for Air Navigation Services — ICAO Abbreviations and Codes (PANS-ABC). Note 3: The inclusion of a colon (‘:’) after each element heading is mandatory. Note 4: Row numbers in the ‘Ref.’ column are included only for clarity and ease of reference, and are not part of the advisory for tropical cyclones. | ||||
|---|---|---|---|---|
| Ref. | Element | Detailed content | Template(s) | |
| 1 | Identification of the type of message (M) | Type of message | TC ADVISORY | |
| 2 | New line | |||
| 3 | Status indicator (C) () | Indicator of test or exercise | STATUS: | TEST or EXER |
| 4 | New line | |||
| 5 | Time of origin (M) | Year, month, day and time of issue in UTC | DTG: | nnnnnnnn/nnnnZ |
| 6 | New line | |||
| 7 | Name of TCAC (M) | Name of TCAC (location indicator orfull name) | TCAC: | nnnn or nnnnnnnnnn |
| 8 | New line | |||
| 9 | Name of tropical cyclone (M) | Name of tropical cyclone or ‘NN’ for unnamed tropical cyclone | TC: | nnnnnnnnnnnn or NN |
| 10 | New line | |||
| 11 | Advisory number (M) | Advisory: Year in full and message number (separate sequence for each tropical cyclone) | ADVISORY NR: | nnnn/[n][n][n]n |
| 12 | New line | |||
| 13 | Observed position of the centre (M) | Day and time (in UTC) and position of the centre of the tropical cyclone (in degrees and minutes) | OBS PSN: | nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] |
| 14 | New line | |||
| 15 | Observed CB cloud (O) () | Location of CB cloud (referring to the latitude and longitude (in degrees and minutes)) and vertical extent (flight level) | CB: | WI nnnKM (or nnnNM) OF TC CENTRE or WI () Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – [Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] – Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn]] TOP [ABV or BLW] FLnnn NIL |
| 16 | New line | |||
| 17 | Direction and speed of movement (M) | Direction and speed of movement given in 16 compass points and km/h (or kt) respectively or stationary (< 2 km/h (1 kt)) | MOV: | N nnKMH (or KT) or NNE nnKMH (or KT) or NE nnKMH (or KT) or ENE nnKMH (or KT) or E nnKMH (or KT) or ESE nnKMH (or KT) or SE nnKMH (or KT) or SSE nnKMH (or KT) or S nnKMH (or KT) or SSW nnKMH (or KT) or SW nnKMH (or KT) or WSW nnKMH (or KT) or W nnKMH (or KT) or WNW nnKMH (or KT) or NW nnKMH (or KT) or NNW nnKMH (or KT) or STNR |
| 18 | New line | |||
| 19 | Changes in intensity (M) | Changes of maximum surface wind speed at time of observation | INTST CHANGE: | INTSF or WKN or NC |
| 20 | New line | |||
| 21 | Central pressure (M) | Central pressure (in hPa) | C: | nnnHPA |
| 22 | New line | |||
| 23 | Maximum surface wind (M) | Maximum surface wind near the centre (mean surface wind over 10 minutes, in kt) | MAX WIND: | nn[n]KT |
| 24 | New line | |||
| 25 | Forecast of centre position (+6 HR) (M) | Day and time (in UTC) (6 hours from the DTG given in Item 5); Forecast position (in degrees and minutes) of the centre of the tropical cyclone | FCST PSN +6 HR: | nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] |
| 26 | New line | |||
| 27 | Forecast of maximum surface wind (+6 HR) (M) | Forecast of maximum surface wind (6 hours after the DTG given in Item 5) | FCST MAX WIND +6 HR: | nn[n]KT |
| 28 | New line | |||
| 29 | Forecast of centre position (+12 HR) (M) | Day and time (in UTC) (12 hours from the DTG given in Item 5) Forecast position (in degrees and minutes) of the centre of the tropical cyclone | FCST PSN +12 HR: | nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] |
| 30 | New line | |||
| 31 | Forecast of maximum surface wind (+12 HR) (M) | Forecast of maximum surface wind (12 hours after the DTG given in Item 5) | FCST MAX WIND +12 HR: | nn[n]KT |
| 32 | New line | |||
| 33 | Forecast of centre position (+18 HR) (M) | Day and time (in UTC) (18 hours from the DTG given in Item 5) Forecast position (in degrees and minutes) of the centre of the tropical cyclone | FCST PSN +18 HR: | nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] |
| 34 | New line | |||
| 35 | Forecast of maximum surface wind (+18 HR) (M) | Forecast of maximum surface wind (18 hours after the DTG given in Item 5) | FCST MAX WIND +18 HR: | nn[n]KT |
| 36 | New line | |||
| 37 | Forecast of centre position (+24 HR) (M) | Day and time (in UTC) (24 hours from the DTG given in Item 5) Forecast position (in degrees and minutes) of the centre of the tropical cyclone | FCST PSN +24 HR: | nn/nnnnZ Nnn[nn] or Snn[nn] Wnnn[nn] or Ennn[nn] |
| 38 | New line | |||
| 39 | Forecast of maximum surface wind (+24 HR) (M) | Forecast of maximum surface wind (24 hours after the DTG given in Item 5) | FCST MAX WIND +24 HR: | nn[n]KT |
| 40 | New line | |||
| 41 | Remarks (M) | Remarks, as necessary | RMK: | Free text up to 256 characters or NIL |
| 42 | New line | |||
| 43 | Expected time of issuance of next advisory (M) | Expected year, month, day and time (in UTC) of issuance of next advisory | NXT MSG: | [BFR] nnnnnnnn/nnnnZ or NO MSG EXP |
APPENDIX · Appendix 7 — Regulation (EU) 2017/373 · Regulation (EU) 2021/1338 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025