---
title: "Appendix 4 — SPECIFIC REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES, ATM/ANS · Avioverse"
description: "Template for wind shear warnings Key: M = inclusion mandatory;"
url: "https://avioverse.aero/regulations/easa/atm-ans/part-met/appendices-to-annex-v/appendix-4"
---

# Appendix 4

SPECIFIC REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES · Regulation (EU) 2017/373 · EAR revision 12 Mar 2025

Appendix Appendix

## Appendix 4

| Template for wind shear warnings Key: M = inclusion mandatory; C = inclusion conditional, whenever applicable. Note 1: The ranges and resolutions for the numerical elements included in wind shear warnings 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: Row numbers in the ‘Ref.’ column are included only for clarity and ease of reference, and are not part of the wind shear warning. |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

| Ref. | Element                                                                               | Detailed content                                                                                    | Template(s)                                                                                                                                                                                                                        |
| ---- | ------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 1    | Location indicator of the aerodrome (M)                                               | Location indicator of the aerodrome                                                                 | nnnn                                                                                                                                                                                                                               |
| 2    | Identification of the type of message (M)                                             | Type of message and sequence number                                                                 | WS WRNG \[n]n                                                                                                                                                                                                                      |
| 3    | Time of origin and validity period (M)                                                | Day and time of issue and, where applicable, validity period in UTC                                 | nnnnnn \[VALID TL nnnnnn] or \[VALID nnnnnn/nnnnnn]                                                                                                                                                                                |
| 4    | IF THE WIND SHEAR WARNING IS TO BE CANCELLED, SEE DETAILS AT THE END OF THE TEMPLATE. |                                                                                                     |                                                                                                                                                                                                                                    |
| 5    | Phenomenon (M)                                                                        | Identification of the phenomenon and its location                                                   | \[MOD] or \[SEV] WS IN APCH or \[MOD] or \[SEV] WS \[APCH] RWYnnn or \[MOD] or \[SEV] WS IN CLIMB-OUT or \[MOD] or \[SEV] WS CLIMB-OUT RWYnnn or MBST IN APCH or MBST \[APCH] RWYnnn or MBST IN CLIMB-OUT or MBST CLIMB-OUT RWYnnn |
| 6    | Observed, reported or forecast phenomenon (M)                                         | Identification whether the phenomenon is observed or reported and expected to continue, or forecast | REP AT nnnn nnnnnnnn or OBS \[AT nnnn] or FCST                                                                                                                                                                                     |
| 7    | Details of the phenomenon (C)                                                         | Description of the phenomenon causing the issuance of the wind shear warning                        | SFC WIND: nnn/nnKT nnnFT – WIND: nnn/nnKT or nnKT LOSS nnNM (or nnKM) FNA RWYnn or nnKT GAIN nnNM (or nnKM) FNA RWYnn                                                                                                              |
|      | OR                                                                                    |                                                                                                     |                                                                                                                                                                                                                                    |
| 8    | Cancellation of wind shear warning                                                    | Cancellation of wind shear warning referring to its identification                                  | CNL WS WRNG \[n]n nnnnnn/nnnnnn                                                                                                                                                                                                    |

APPENDIX · Appendix 4 — 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.