MET.OR.235 Aerodrome warnings and wind shear warnings and alerts

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

IRImplementing rule

MET.OR.235Aerodrome warnings and wind shear warnings and alerts

An aerodrome meteorological office shall:

(a)provide aerodrome warnings information;

(b)prepare wind shear warnings for aerodromes where wind shear is considered a factor, in accordance with local arrangements with the appropriate ATS unit and operators concerned;

(c)issue, at aerodromes where wind shear is detected by automated, ground-based, wind shear remote-sensing or detection equipment, wind shear alerts generated by these systems;

(d)cancel warnings when the conditions are no longer occurring and/or no longer expected to occur at the aerodrome.

IR · MET.OR.235 — Regulation (EU) 2017/373 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 MET.OR.235Aerodrome warnings and wind shear warnings and alerts

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AUTOMATED DETECTION EQUIPMENT The decision to install an automated wind shear detection equipment should be based on the local meteorological and air traffic considerations. Where such equipment is installed, wind shear alerts should be issued in accordance with MET.OR.235(c).

GM · GM1 MET.OR.235 — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMCAcceptable means of compliance

AMC1 MET.OR.235(c)Aerodrome warnings and wind shear warnings and alerts

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WIND SHEAR FOLLOW-UP Wind shear alerts should be updated at least every minute. They should be cancelled as soon as the headwind/tailwind change falls below 15 kt.

AMC · AMC1 MET.OR.235(c) — Regulation (EU) 2017/373 · ED Decision 2022/004/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 MET.OR.235(c)Aerodrome warnings and wind shear warnings and alerts

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WIND SHEAR ALERTS Wind shear alerts are expected to complement wind shear warnings and together are intended to enhance situational awareness of wind shear.

GM · GM1 MET.OR.235(c) — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 MET.OR.235(d)Aerodrome warnings and wind shear warnings and alerts

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CANCELLATION OF WARNINGS The criteria for the cancellation of wind shear warnings are defined locally for each aerodrome, as agreed between the aerodrome meteorological office, the appropriate ATS units and the operators concerned.

GM · GM1 MET.OR.235(d) — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

All rules in SUBPART A — ADDITIONAL ORGANISATION REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES (MET.OR)

Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, extracted 17 Aug 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.

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