--- title: "MET.OR.100 – MET.OR.275: SUBPART A — ADDITIONAL ORGANISATION REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES (MET.OR) (SPECIFIC REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES, ATM/ANS) — rule index · Avioverse" description: "MET.OR.100 – MET.OR.275, Regulation (EU) 2017/373. A meteorological services provider shall provide operators, flight crew members, air traffic services…" url: "https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a" --- # SUBPART A — ADDITIONAL ORGANISATION REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES (MET.OR) SPECIFIC REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES · Air Traffic Management / Air Navigation Services · Regulation (EU) 2017/373 · MET.OR.100 – MET.OR.275 On this page 1. ## [MET.OR.100 Meteorological data and information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-100) A meteorological services provider shall provide operators, flight crew members, air traffic services units, search and rescue services units, aerodrome… [GM1 MET.OR.100 Meteorological data and information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-100#gm1-met-or-100) [GM2 MET.OR.100 Meteorological data and information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-100#gm2-met-or-100) [AMC1 MET.OR.100(a) Meteorological data and information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-100#amc1-met-or-100-a) [GM1 MET.OR.100(a) Meteorological data and information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-100#gm1-met-or-100-a) 2. ## [MET.OR.105 Retention of meteorological information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-105) A meteorological services provider shall retain meteorological information issued for a period of at least 30 days from the date of issue. [GM1 MET.OR.105(b) Retention of meteorological information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-105#gm1-met-or-105-b) 3. ## [MET.OR.110 Meteorological information exchange requirements](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-110) A meteorological services provider shall ensure it has systems and processes in place, as well as access to suitable telecommunications facilities to: [GM1 MET.OR.110 Meteorological information exchange requirements](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-110#gm1-met-or-110) [GM2 MET.OR.110 Meteorological information exchange requirements](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-110#gm2-met-or-110) [GM1 MET.OR.110(a) Meteorological information exchange requirements](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-110#gm1-met-or-110-a) 4. ## [MET.OR.115 Meteorological bulletins](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-115) The meteorological services provider responsible for the area concerned shall provide meteorological bulletins to the relevant users. 5. ## [MET.OR.120 Notification of discrepancies to the world area forecast centres (WAFCs)](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-120) The meteorological services provider using WAFS SIGWX forecasts shall notify the WAFC concerned immediately if significant discrepancies are detected or… [GM1 MET.OR.120 Notification of discrepancies to the world area forecast centres (WAFCs)](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-120#gm1-met-or-120) 6. ## [MET.OR.200 Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200) An aeronautical meteorological station shall issue: local routine report at fixed intervals, only for dissemination at the aerodrome of origin; [GM1 MET.OR.200(a) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#gm1-met-or-200-a) [AMC1 MET.OR.200(a) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#amc1-met-or-200-a) [GM1 MET.OR.200(a)(2) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#gm1-met-or-200-a-2) [AMC1 MET.OR.200(a)(3) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#amc1-met-or-200-a-3) [AMC2 MET.OR.200(a)(3) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#amc2-met-or-200-a-3) [GM1 MET.OR.200(a)(3) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#gm1-met-or-200-a-3) [AMC1 MET.OR.200(b) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#amc1-met-or-200-b) [AMC2 MET.OR.200(b) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#amc2-met-or-200-b) [GM1 MET.OR.200(b) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#gm1-met-or-200-b) [GM2 MET.OR.200(b) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#gm2-met-or-200-b) [GM3 MET.OR.200(b) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#gm3-met-or-200-b) [AMC1 MET.OR.200(d) Meteorological reports and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-200#amc1-met-or-200-d) 7. ## [MET.OR.205 Reporting of meteorological elements](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-205) An aeronautical meteorological station shall report: surface wind direction and speed; 8. ## [MET.OR.210 Observing meteorological elements](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-210) An aeronautical meteorological station shall observe and/or measure: [AMC1 MET.OR.210 Observing meteorological elements](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-210#amc1-met-or-210) [AMC2 MET.OR.210 Observing meteorological elements](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-210#amc2-met-or-210) 9. ## [MET.OR.215 Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215) An aerodrome meteorological office shall: prepare and/or obtain forecasts and other relevant meteorological information necessary for the performance of… [AMC1 MET.OR.215(a) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#amc1-met-or-215-a) [GM1 MET.OR.215(a) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#gm1-met-or-215-a) [GM2 MET.OR.215(a) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#gm2-met-or-215-a) [AMC1 MET.OR.215(c) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#amc1-met-or-215-c) [GM1 MET.OR.215(c) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#gm1-met-or-215-c) [GM2 MET.OR.215(c) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#gm2-met-or-215-c) [GM3 MET.OR.215(c) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#gm3-met-or-215-c) [GM1 MET.OR.215(d) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#gm1-met-or-215-d) [GM2 MET.OR.215(d) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#gm2-met-or-215-d) [GM3 MET.OR.215(d) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#gm3-met-or-215-d) [AMC1 MET.OR.215(e) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#amc1-met-or-215-e) [AMC1 MET.OR.215(f) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#amc1-met-or-215-f) [AMC1 MET.OR.215(g) Forecasts and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-215#amc1-met-or-215-g) 10. ## [MET.OR.220 Aerodrome forecasts](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-220) An aerodrome meteorological office shall issue aerodrome forecasts as a TAF at a specified time. [AMC1 MET.OR.220(a) Aerodrome forecasts](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-220#amc1-met-or-220-a) [GM1 MET.OR.220(a) Aerodrome forecasts](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-220#gm1-met-or-220-a) 11. ## [MET.OR.225 Forecasts for landing](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-225) An aerodrome meteorological office shall prepare forecasts for landing as determined by the competent authority. [GM1 MET.OR.225 Forecasts for landing](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-225#gm1-met-or-225) [GM1 MET.OR.225(a) Forecasts for landing](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-225#gm1-met-or-225-a) [GM1 MET.OR.225(b) Forecasts for landing](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-225#gm1-met-or-225-b) 12. ## [MET.OR.230 Forecasts for take-off](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-230) An aerodrome meteorological office shall: prepare forecasts for take-off as determined by the competent authority; 13. ## [MET.OR.235 Aerodrome warnings and wind shear warnings and alerts](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-235) An aerodrome meteorological office shall: provide aerodrome warnings information; [GM1 MET.OR.235 Aerodrome warnings and wind shear warnings and alerts](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-235#gm1-met-or-235) [AMC1 MET.OR.235(c) Aerodrome warnings and wind shear warnings and alerts](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-235#amc1-met-or-235-c) [GM1 MET.OR.235(c) Aerodrome warnings and wind shear warnings and alerts](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-235#gm1-met-or-235-c) [GM1 MET.OR.235(d) Aerodrome warnings and wind shear warnings and alerts](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-235#gm1-met-or-235-d) 14. ## [MET.OR.240 Information for use by operator or flight crew](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-240) An aerodrome meteorological office shall provide operators and flight crew members with the latest available: [GM1 MET.OR.240(a) Information for use by operator or flight crew](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-240#gm1-met-or-240-a) [GM1 MET.OR.240(b) Information for use by operator or flight crew](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-240#gm1-met-or-240-b) [GM1 MET.OR.240(d) Information for use by operator or flight crew](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-240#gm1-met-or-240-d) [GM1 MET.OR.240(e) Information for use by operator or flight crew](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-240#gm1-met-or-240-e) 15. ## [MET.OR.242 Information to be provided to air traffic services units](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-242) An aerodrome meteorological office shall provide, as necessary, its associate aerodrome control tower and AFIS unit with: 16. ## [MET.OR.245 Meteorological watch and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-245) Within its area of responsibility, the meteorological watch office shall: [AMC1 MET.OR.245(a) Meteorological watch and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-245#amc1-met-or-245-a) [AMC1 MET.OR.245(f)(3) Meteorological watch and other information](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-245#amc1-met-or-245-f-3) 17. ## [MET.OR.250 SIGMET](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-250) A meteorological watch office shall: issue SIGMET; ensure that the SIGMET is cancelled when the phenomena are no longer occurring or are no longer… [AMC1 MET.OR.250(a) SIGMET](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-250#amc1-met-or-250-a) [AMC2 MET.OR.250(a) SIGMET](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-250#amc2-met-or-250-a) [GM1 MET.OR.250(a) SIGMET](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-250#gm1-met-or-250-a) [AMC1 MET.OR.250(c) SIGMET](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-250#amc1-met-or-250-c) 18. ## [MET.OR.255 AIRMET](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-255) A meteorological watch office shall: issue AIRMET when the competent authority has determined that the density of traffic operating below flight level… [AMC1 MET.OR.255(a) AIRMET](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-255#amc1-met-or-255-a) [GM1 MET.OR.255(a) AIRMET](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-255#gm1-met-or-255-a) 19. ## [MET.OR.260 Area forecasts for low-level flights](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-260) A meteorological watch office shall ensure that: in the case of AIRMET being issued in combination with area forecasts for low-level flights in… 20. ## [MET.OR.265 Volcanic ash advisory centre responsibilities](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-265) In its area of responsibility, the VAAC shall: when a volcano has erupted, or is expected to erupt, or volcanic ash is reported, issue advisory… [AMC1 MET.OR.265(a) Volcanic ash advisory centre responsibilities](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-265#amc1-met-or-265-a) [GM1 MET.OR.265(a) Volcanic ash advisory centres (VAACs) responsibilities](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-265#gm1-met-or-265-a) [GM2 MET.OR.265(a) Volcanic ash advisory centre responsibilities](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-265#gm2-met-or-265-a) 21. ## [MET.OR.270 Tropical cyclone advisory centre responsibilities](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-270) In its area of responsibility, the TCAC shall issue: advisory information concerning the position of the cyclone centre, changes in intensity at the time… [AMC1 MET.OR.270(a) Tropical cyclone advisory centre responsibilities](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-270#amc1-met-or-270-a) [GM1 MET.OR.270(a) Tropical cyclone advisory centre responsibilities](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-270#gm1-met-or-270-a) 22. ## [MET.OR.275 World area forecast centre responsibilities](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-275) The WAFC shall issue: gridded global forecasts of: upper wind; [AMC1 MET.OR.275(a) World area forecast centre responsibilities](https://avioverse.aero/regulations/easa/atm-ans/part-met/subpart-a/met-or-275#amc1-met-or-275-a) Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, extracted 13 Oct 2026) for convenience. 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