--- title: "Appendix 3 — SPECIFIC REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES, ATM/ANS · Avioverse" description: "Template for TAF Key: M = inclusion mandatory; C = inclusion conditional, dependent on meteorological conditions or method of observation;" url: "https://avioverse.aero/regulations/easa/atm-ans/part-met/appendices-to-annex-v/appendix-3" --- # Appendix 3 SPECIFIC REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES · Regulation (EU) 2017/373 · EAR revision 12 Mar 2025 Appendix Appendix ## Appendix 3 | Template for TAF Key: M = inclusion mandatory; C = inclusion conditional, dependent on meteorological conditions or method of observation; O = inclusion optional. Note 1: The ranges and resolutions for the numerical elements included in TAF are provided in a separate table below this template. 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: Row numbers in the ‘Ref.’ column are included only for clarity and ease of reference, and are not part of the TAF. | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------- | ---------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | --------- | | Ref. | Element | Detailed content | Template(s) | | | | | 1 | Identification of the type of forecast (M) | Type of forecast (M) | TAF or TAF AMD or TAF COR | | | | | 2 | Location indicator (M) | ICAO location indicator (M) | nnnn | | | | | 3 | Time of issue of the forecast (M) | Day and time of issue of the forecast in UTC (M) | nnnnnnZ | | | | | 4 | Identification of a missing forecast (C) | Missing forecast identifier (C) | NIL | | | | | 5 | END OF TAF IF THE FORECAST IS MISSING. | | | | | | | 6 | Days and period of validity of the forecast (M) | Days and period of validity of the forecast in UTC (M) | nnnn/nnnn | | | | | 7 | Identification of a cancelled forecast (C) | Cancelled forecast identifier (C) | CNL | | | | | 8 | END OF TAF IF THE FORECAST IS CANCELLED. | | | | | | | 9 | Surface wind (M) | Wind direction (M) | nnn or VRB | | | | | | | Wind speed (M) | \[P]nn\[n] | | | | | | | Significant speed variations (C) | G\[P]nn\[n] | | | | | | | Units of measurement (M) | KT | | | | | 10 | Visibility (M) | Prevailing visibility (M) | nnnn | | | C A V O K | | 11 | Weather (C) | Intensity of weather phenomena (C) () | – or + | | — | | | | | Characteristics and type of weather phenomena (C) | DZ or RA or SN or SG or PL or DS or SS or FZDZ or FZRA or SHGR or SHGS or SHRA or SHSN or TSGR or TSGS or TSRA or TSSN | | FG or BR or SA or DU or HZ or FU or VA or SQ or PO or FC or TS or BCFG or BLDU or BLSA or BLSN or DRDU or DRSA or DRSN or FZFG or MIFG or PRFG | | | 12 | Cloud (M) () | Cloud amount and height of base or vertical visibility (M) | FEWnnn or SCTnnn or BKNnnn or OVCnnn | VVnnn or VV/// | N S C | | | | | Cloud type (C) | CB or TCU | — | | | | 13 | Temperature (O) () | Name of the element (M) | TX | | | | | | | Maximum temperature (M) | \[M]nn/ | | | | | | | Day and time of occurrence of the maximum temperature (M) | nnnnZ | | | | | | | Name of the element (M) | TN | | | | | | | Minimum temperature (M) | \[M]nn/ | | | | | | | Day and time of occurrence of the minimum temperature (M) | nnnnZ | | | | | 14 | Expected significant changes to one or more of the above elements during the period of validity (C) | Change or probability indicator (M) | PROB30 \[TEMPO] or PROB40 \[TEMPO] or BECMG or TEMPO or FM | | | | | | | Period of occurrence or change (M) | nnnn/nnnn or nnnnnn | | | | | | | Wind (C) | nnn\[P]nn\[G\[P]nn]KT or VRBnnKT | | | | | | | Prevailing visibility (C) | nnnn | | | C A V O K | | | | Weather phenomenon: intensity (C) | – or + | — | N S W | | | | | Weather phenomenon: characteristics and type (C) | DZ or RA or SN or SG or PL or DS or SS or FZDZ or FZRA or SHGR or SHGS or SHRA or SHSN or TSGR or TSGS or TSRA or TSSN | FG or BR or SA or DU or HZ or FU or VA or SQ or PO or FC or TS or BCFG or BLDU or BLSA or BLSN or DRDU or DRSA or DRSN or FZFG or MIFG or PRFG | | | | 15 | | Cloud amount and height of base or vertical visibility (C) | FEWnnn or SCTnnn or BKNnnn or OVCnnn | VVnnn or VV/// | N S C | | | | | Cloud type (C) | CB or TCU | — | | | | Ranges and resolutions for the numerical elements included in TAF | | | | | | | ----------------------------------------------------------------- | -------------------------------------- | -------- | -- | ----------------- | ---------------------- | | Ref. | Elements | | | Range | Resolution | | 1 | Wind direction: | ° true | | 000–360 | 10 | | 2 | Wind speed: | KT | | 00–99 | 1 | | 3 | Visibility: | M | | 0000–0750 | 50 | | | | M | | 0800–4 900 | 100 | | | | M | | 5 000–9 000 | 1 000 | | | | M | | 10 000 or greater | 0 (fixed value: 9 999) | | 4 | Vertical visibility: | 100’s FT | | 000–020 | 1 | | 5 | Cloud: height of cloud base: | 100’s FT | | 000–099 100–200 | 1 10 | | 6 | Air temperature (maximum and minimum): | | °C | –80 – +60 | 1’ | APPENDIX · Appendix 3 — Regulation (EU) 2017/373 · Regulation (EU) 2021/1338 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025 [All rules in APPENDICES TO ANNEX V](https://avioverse.aero/regulations/easa/atm-ans/part-met/appendices-to-annex-v) Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.