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.

1

Identification of the type of message (M)

Type of message

TC ADVISORY

2

New line

3

Status indicator (C) ([124])

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) ([125])

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 ([126]) 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