AMC1 MET.TR.200(a)(12) Meteorological reports and other information
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.
EASA aviation regulations require semi-automatic weather reports (METAR/SPECI) to include supplementary information on recent significant weather phenomena like freezing precipitation, heavy rain, blowing snow, storms, and volcanic ash. Local reports must also detail conditions such as cumulonimbus clouds, turbulence, wind shear, icing, and dust storms, specifying location and using plain language.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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