Table B1
| Explanation of Data Designators T1T2A1A2ii CCCC |
| TABLE B1 Data type designator T2 (when T1 = A,C,F,N,S,T,U or W) |
| Instructions for the proper application of the data type designators |
| (1) | The designators specified in this table should be used to the greatest extent possible to indicate the type of data contained within the body of the bulletin. |
| (2) | When the tables does not contain a suitable deisgnator for the data type, an alphabetic designator which is not assigned in the table should be introduced and the WMO Secretariat notified. |
| (3) | This table includes only the FM number and code name for an individual code form. The Roman numeral identifying the latest version has been omitted to reduce clutter. In all cases the latest version of a code is implied. Refer to WMO-No. 306 - Manual on Codes for the complete code name (including the version) of any numbered code. In those few instances where a numbered code does not exist, a reference and the common name is given: e.g. [ICAO] (AIREP). An explanatory note may be appended to an individual table if necessary. |
| (4) | In the event that no standard format has been established for a particular data type, and where there is a recommended format, that format is given in square brackets under the column labeled Code form (e.g. [TEXT]). This is a character code in free form - International Alphabet No. 2 (Attachment II–1) or International Alphabet No. 5 (Attachment II–2) will be used. |
| T1 = A - Analyses | |||
| T1 | T2 | T2 - Data Type | Code Form |
| A | C | Cyclone | [TEXT] |
| A | G | Hydrological/Marine | [TEXT] |
| A | H | Thickness | [TEXT] |
| A | I | Ice | FM 44 (ICEAN) |
| A | O | Ozone layer | [TEXT] |
| A | R | Radar | [TEXT] |
| A | S | Surface | FM 45 (IAC)/FM 46 (IAC FLEET) |
| A | U | Upper air | FM 45 (IAC) |
| A | W | Weather Summary | [TEXT] |
| A | X | Miscellaneous | [TEXT] |
| T1 = C - Climatic data | |||
| T1 | T2 | T2 - Data Type | Code Form |
| C | A | Climatic anomalies | [TEXT] |
| C | E | Monthly means (upper air) | FM 76 (CLIMAT TEMP SHIP) |
| C | H | Monthly means (surface) | FM 72 (CLIMAT SHIP) |
| C | O | Monthly means (ocean areas) | FM 73 (NACLI, CLINP, SPCLI, CLISA, INCLI) |
| C | S | Monthly means (surface) | FM 71 (CLIMAT) |
| T1 = F = Forecast | |||
| T1 | T2 | T2 - Data Type | Code Form |
| F | A | Aviation area /GAMET/advisories | FM 53 (ARFOR)/[TEXT] |
| F | B | Upper winds and temperatures | FM 50 (WINTEM) |
| F | C | Aerodrome (VT < 12 hours) | FM 51 (TAF) |
| F | D | Radiological trajectory dose | FM 57 (RADOF) |
| F | E | Extended | [TEXT] |
| F | F | Shipping | FM 46 (IAC FLEET) |
| F | G | Hydrological | FM 68 (HYFOR) |
| F | H | Upper air thickness | [TEXT] |
| F | I | Iceberg | [TEXT] |
| F | J | Radio warning service (including IUWDS data) | [TEXT] |
| F | K | Tropical cyclone advisories | [TEXT] |
| F | L | Local/Area | [TEXT] |
| F | M | Temperature extremes | [TEXT] |
| F | O | Guidance | [TEXT] |
| F | P | Public | [TEXT] |
| F | Q | Other shipping | [TEXT] |
| F | R | Aviation route | FM 54 (ROFOR) |
| F | S | Surface | FM 45 (IAC)/FM 46 (IAC FLEET) |
| F | T | Aerodrome (VT >= 12 hours) | FM 51 (TAF) |
| F | U | Upper air | FM 45 (IAC) |
| F | V | Volcanic ash advisories | [TEXT] |
| F | W | Winter sports | [TEXT] |
| F | X | Miscellaneous | [TEXT] |
| F | Z | Shipping area | FM 61 (MAFOR) |
| T1 = N- Notices | |||
| T1 | T2 | T2 - Data Type | Code Form |
| N | G | Hydrological | [TEXT] |
| N | H | Marine | [TEXT] |
| N | N | Nuclear emergency response | [TEXT] |
| N | O | METNO/WIFMA | [TEXT] |
| N | P | Product generation delay | [TEXT] |
| N | T | TEST MSG [System related] | [TEXT] |
| N | W | Warning related and/or cancellation | [TEXT] |
| T1 = S - Surface data | |||
| T1 | T2 | T2 - Data Type | Code Form |
| S | A | Aviation routine reports | FM 15 (METAR) |
| S | B | Radar reports (Part A) | FM 20 (RADOB) |
| S | C | Radar reports (Part B) | FM 20 (RADOB) |
| S | D | Radar reports (Parts A & B) | FM 20 (RADOB) |
| S | E | Seismic data | *(SEISMIC) |
| S | F | Atmospherics reports | FM 81 (SFAZI)/FM 82 (SFLOC)/FM 83 (SFAZU) |
| S | G | Radiological data report | FM 22 (RADREP) |
| S | I | Intermediate synoptic hour | FM 12 (SYNOP)/FM 13 (SHIP) |
| S | L | - | - |
| S | M | Main synoptic hour | FM 12 (SYNOP)/FM 13 (SHIP) |
| S | N | Non-standard synoptic hour | FM 12 (SYNOP)/FM 13 (SHIP) |
| S | O | Oceanographic data | FM 63 (BATHY)/FM 64 (TESAC)/FM 62 (TRACKOB) |
| S | P | Special aviation weather reports | FM 16 (SPECI) |
| S | R | Hydrological (river) reports | FM 67 (HYDRA) |
| S | S | Drifting buoy reports | FM 18 (BUOY) |
| S | T | Sea Ice | [TEXT] |
| S | U | Snow depth | [TEXT] |
| S | V | Lake ice | [TEXT] |
| S | W | Wave information | FM 65 (WAVEOB) |
| S | X | Miscellaneous | [TEXT] |
| S | Y | Seismic wave form data | [any format] |
| S | Z | Sea level data and deep-ocean tsunami data | [any alphanumeric format] |
| T1 = T - Satellite data | |||
| T1 | T2 | T2 - Data Type | Code Form |
| T | B | Satellite orbit parameters | [TEXT] |
| T | C | Satellite cloud interpretations | FM 85 (SAREP) |
| T | H | Satellite remote upper air soundings | FM 86 (SATEM) |
| T | R | Clear radiance observations | FM 87 (SARAD) |
| T | T | Sea surface temperatures | FM 88 (SATOB) |
| T | W | Winds and cloud temperatures | FM 88 (SATOB) |
| T | X | Miscellaneous | [TEXT] |
| T1 = U - Upper air data | |||
| T1 | T2 | T2 - Data Type | Code Form |
| U | A | Aircraft reports | FM 41 (CODAR), ICAO (AIREP) |
| U | D | Aircraft reports | FM 42 (AMDAR) |
| U | E | Upper level pressure, temperature, humidity and wind (Part D) | FM 35 (TEMP)/FM 36 (TEMP SHIP)/FM 38 (TEMP MOBIL) |
| U | F | Upper level pressure, temperature, humidity and wind (Parts C and D) [National and bilateral option] | FM 35 (TEMP)/FM 36 (TEMP SHIP)/FM 38 (TEMP MOBIL) |
| U | G | Upper wind (Part B) | FM 32 (PILOT)/FM 33(PILOT SHIP)/FM 34(PILOT MOBIL) |
| U | H | Upper wind (Part C) | FM 32 (PILOT)/FM 33 (PILOT SHIP)/FM 34 (PILOT MOBIL) |
| U | I | Upper wind (Parts A and B) [National and bilateral option] | FM 32(PILOT)/FM 33(PILOT SHIP)/FM 34 (PILOT MOBIL) |
| U | K | Upper level pressure, temperature, humidity and wind (Part B) | FM 35 (TEMP)/FM 36 (TEMP SHIP)/FM 38 (TEMP MOBIL) |
| U | L | Upper level pressure, temperature, humidity and wind (Part C) | FM 35 (TEMP)/FM 36 (TEMP SHIP)/FM 38 (TEMP MOBIL) |
| U | M | Upper level pressure, temperature, humidity and wind (Parts A and B) [National and bilateral option] | FM 35 (TEMP)/FM 36 (TEMP SHIP)/FM 38 (TEMP MOBIL) |
| U | N | Rocketsonde reports | FM 39(ROCOB)/FM 40 (ROCOB SHIP) |
| U | P | Upper wind (Part A) | FM 32 (PILOT)/FM 33 (PILOT SHIP)/FM 34 (PILOT MOBIL) |
| U | Q | Upper wind (Part D) | FM 32(PILOT)/FM 33 (PILOT SHIP)/FM 34 (PILOT MOBIL) |
| U | R | Aircraft report | [NATIONAL**] (RECCO) |
| U | S | Upper level pressure, temperature, humidity and wind (Part A) | FM 35 (TEMP)/FM 36 (TEMP SHIP)FM 38 (TEMP MOBIL) |
| U | T | Aircraft report | FM 41 (CODAR) |
| U | X | Miscellaneous | [TEXT] |
| U | Y | Upper wind (Parts C and D) [National and bilateral option] | FM 32 (PILOT)/FM 33 (PILOT SHIP)/FM 34 (PILOT MOBIL) |
| U | Z | Upper level pressure, temperature, humidity and wind from a sonde released by carrier balloon or aircraft (Parts A, B, C, D) | FM 37 (TEMP DROP) |
| T1 = W - Warnings | |||
| T1 | T2 | T2 - Data Type | Code Form |
| W | A | AIRMET | [TEXT] |
| W | C | Tropical cyclone (SIGMET) | [TEXT] |
| W | E | Tsunami | [TEXT] |
| W | F | Tornado | [TEXT] |
| W | G | Hydrological/River flood | [TEXT] |
| W | H | Marine/Coastal flood | [TEXT] |
| W | O | Other | [TEXT] |
| W | S | SIGMET | [TEXT] |
| W | T | Tropical cyclone (Typhoon/Hurricane) | [TEXT] |
| W | U | Severe thunderstorm | [TEXT] |
| W | V | Volcanic ash clouds (SIGMET) | [TEXT] |
| W | W | Warnings and weather summary | [TEXT] |
* The international seismic code is documented in the Manual on Codes (WMO-No. 306), Volume I, Attachment I.
** For example, United States national code form for reports from a meteorological reconnaissance flight (RECCO), is documented in the Manual on Codes (WMO-No. 306), Volume II, Chapter IV, Part F.