AMC1 MET.TR.200(a)(12) Meteorological reports and other information

• ED Decision 2022/004/R found in: ATM/ANS Provision of Services (2017/373) (Mar 2025)

AMC1 MET.TR.200(a)(12) Meteorological reports and other information ED Decision 2022/004/R **SUPPLEMENTARY INFORMATION — SEMI-AUTOMATIC OBSERVING SYSTEM** (a) In local routine report, local special report, METAR and SPECI, when reported by a semi-automatic observing system, the following recent weather phenomena should be reported, up to a maximum of three groups, in the supplementary information: (1) freezing precipitation; (2) moderate or heavy precipitation, including showers thereof; (3) blowing snow; (4) dust storm, sandstorm; (5) thunderstorm; (6) funnel cloud, tornado or water spout; and (7) volcanic ash. (b) In local routine report and local special report when reported by a semi-automatic observing system, the following significant meteorological conditions, or combinations thereof, should be reported in the supplementary information: (1) cumulonimbus clouds (CB); (2) thunderstorm (TS); (3) moderate or severe turbulence (MOD TURB, SEV TURB); (4) wind shear (WS); (5) hail (GR); (6) severe squall line (SEV SQL); (7) moderate or severe icing (MOD ICE, SEV ICE); (8) freezing precipitation (FZDZ, FZRA); (9) severe mountain waves (SEV MTW); (10) dust storm, sandstorm (DS, SS); (11) blowing snow (BLSN); and (12) funnel cloud (tornado or water spout) (FC). The location of the condition should be indicated. Where necessary, additional information should be included using abbreviated plain language. AMC1 MET.TR.200(a)(12) Meteorological reports and other information ED Decision 2022/004/R **SUPPLEMENTARY INFORMATION — SEMI-AUTOMATIC OBSERVING SYSTEM** (a)       In local routine report, local special report, METAR and SPECI, when reported by a semi-automatic observing system, the following recent weather phenomena should be reported, up to a maximum of three groups, in the supplementary information: (1)       freezing precipitation; (2)       moderate or heavy precipitation, including showers thereof; (3)       blowing snow; (4)       dust storm, sandstorm; (5)       thunderstorm; (6)       funnel cloud, tornado or water spout; and (7)       volcanic ash. (b)       In local routine report and local special report when reported by a semi-automatic observing system, the following significant meteorological conditions, or combinations thereof, should be reported in the supplementary information: (1)       cumulonimbus clouds (CB); (2)       thunderstorm (TS); (3)       moderate or severe turbulence (MOD TURB, SEV TURB); (4)       wind shear (WS); (5)       hail (GR); (6)       severe squall line (SEV SQL); (7)       moderate or severe icing (MOD ICE, SEV ICE); (8)       freezing precipitation (FZDZ, FZRA); (9)       severe mountain waves (SEV MTW); (10)     dust storm, sandstorm (DS, SS); (11)     blowing snow (BLSN); and (12)     funnel cloud (tornado or water spout) (FC). The location of the condition should be indicated. Where necessary, additional information should be included using abbreviated plain language.