Page 144 - UK ATM ANS Regulations (Consolidated) 201121

Part MET - ANNEX V - Specific Requirements for the Providers of Meteorological
Services

concerned.
(b) The criteria should be consistent with the corresponding criteria for special reports
established for the aerodrome.
MET.TR.235 Aerodrome warnings and wind shear warnings and alerts
(a) Wind shear warnings shall be issued in accordance with the template in Appendix 4.
(b) The sequence number referred to in the template in Appendix 4 shall correspond to the
number of wind shear warnings issued for the aerodrome since 00.01 UTC on the day
concerned.
(c) Wind shear alerts shall give concise, up-to-date information related to the observed
existence of wind shear involving a headwind/tailwind change of 15 kt (7,5 m/s) or more
which could adversely affect aircraft on the final approach path or initial take-off path and
aircraft on the runway during the landing roll or take-off run.
(d) Wind shear alert shall, if practicable, relate to specific sections of the runway and
distances along the approach path or take-off path as agreed between the aerodrome
meteorological office, the appropriate ATS units and the operators concerned.
MET.TR.235 AMC1 Aerodrome warnings and wind shear warnings and alerts
AERODROME WARNINGS - FORMAT
(a) Aerodrome warnings should be issued in accordance with the template below or in
another format where required by operators or aerodrome meteorological offices.
(b) When the above template is used, the sequence number referred to in the template
should correspond to the number of aerodrome warnings issued for the aerodrome since
00.01 UTC on the day concerned.

MET.TR.235 GM1 Aerodrome warnings and wind shear warnings and alerts
RANGES AND RESOLUTIONS AERODROME WARNINGS
(a) The ranges and resolutions for the numerical elements included in aerodrome warnings
are shown below:
(b) The explanations for the abbreviations can be found in ICAO Doc 8400 ‘Procedures for Air
Navigation Services — ICAO Abbreviations and Codes (PANS-ABC)’.

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