MET.TR.255 AIRMET

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

IRImplementing rule

MET.TR.255AIRMET

(a)AIRMET shall be issued in accordance with the template shown in Appendix 5.

(b)The sequence number referred to in the template in Appendix 5 shall correspond to the number of AIRMET issued for the flight information region since 00.01 UTC on the day concerned.

(c)Only one of the phenomena in Appendix 5 shall be included in an AIRMET, using the appropriate abbreviations and the following threshold values, when the phenomenon is below flight level 100, or below flight level 150 in mountainous areas, or higher, where necessary:

(1)widespread surface wind speed above 30 kt with relevant direction and units;

(2)widespread areas affected by reduction of visibility to less than 5 000 m, including the weather phenomenon causing the reduction of visibility;

(3)widespread areas of broken or overcast cloud with height of base less than 1 000 ft above ground level’.

(d)AIRMET concerning thunderstorms or cumulonimbus clouds shall not include references to associated turbulence and icing.

IR · MET.TR.255 — Regulation (EU) 2017/373 · Regulation (EU) 2021/1338 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMCAcceptable means of compliance

AMC1 MET.TR.255(a)AIRMET

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AIRMET — CODE FORM AIRMET, and cancellations thereof, should be encoded using:

(a)the IWXXM GML form as specified in point (a) of AMC1 MET.TR.115(a);

(b)abbreviated plain language as specified in point (c) of AMC1 MET.TR.115(a).

AMC · AMC1 MET.TR.255(a) — Regulation (EU) 2017/373 · ED Decision 2022/004/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 MET.TR.255(a)AIRMET

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EXAMPLE OF AIRMET FOR MODERATE MOUNTAIN WAVE

YUCC AIRMET 2 VALID 221215/221600 YUDO — YUCC AMSWELL FIR MOD MTW OBS AT 1205Z N48 E010 FL080 STNR NC Meaning: The second AIRMET issued for the AMSWELL* flight information region (identified by YUCC Amswell area control centre) by the Donlon/International* meteorological watch office (YUDO) since 00.01 UTC; the AIRMET is valid from 12.15 UTC to 16.00 UTC on the 22nd of the month; moderate mountain wave was observed at 1205 UTC at 48 degrees north and 10 degrees east at flight level 080; the mountain wave is expected to remain stationary and not to undergo any changes in intensity. * Fictitious locations

GM · GM1 MET.TR.255(a) — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM2 MET.TR.255(a)AIRMET

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EXAMPLE OF AIRMET, AND THE CORRESPONDING CANCELLATIONS

AIRMET YUDD AIRMET 1 VALID 151520/151800 YUSO– YUDD SHANLON FIR ISOL TS OBS N OF S50 TOP ABV FL100 STNR WKN

Cancellation of AIRMET YUDD AIRMET 2 VALID 151650/151800 YUSO– YUDD SHANLON FIR CNL AIRMET 1 151520/151800

GM · GM2 MET.TR.255(a) — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 MET.TR.255(b)AIRMET

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FIR The flight information region may be divided in sub-areas.

GM · GM1 MET.TR.255(b) — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GMGuidance material

GM1 MET.TR.255(c)AIRMET

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CRITERIA RELATED TO PHENOMENA In reference to the criteria related to phenomena, please refer to GM1 MET.TR.250(d).

GM · GM1 MET.TR.255(c) — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMCAcceptable means of compliance

AMC1 MET.TR.255(d)AIRMET

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CRITERIA RELATED TO PHENOMENA In reference to sandstorm/dust storm, please refer to AMC1 MET.TR.250(d).

AMC · AMC1 MET.TR.255(d) — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

All rules in SUBPART B — TECHNICAL REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES (MET.TR)

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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