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4.7.3.2 In local routine and special reports:
a) QNH shall be included;
b) QFE shall be included if required by users or, if so
agreed locally between the meteorological and air traffic
services authorities and operators concerned, on a
regular basis;
c) the units of measurement used for QNH and QFE values
shall be included; and
d) if QFE values are required for more than one runway,
the required QFE values for each runway shall be
reported and the runways to which the values refer shall
be indicated.
4.7.3.3 In METAR and SPECI, only QNH values shall be
included.
4.8 Supplementary information
4.7 Atmospheric pressure
4.8.1 Reporting
4.7.1 Display
When automated equipment is used for the measurement of
pressure, QNH and, if required in accordance with 4.7.3.2 b),
QFE displays relating to the barometer shall be located in the
meteorological station with corresponding displays in the
appropriate air traffic services units. When QFE values are
4.8.1.1 Recommendation.- In local routine and special
reports and in METAR and SPECI, the following recent
weather phenomena, i.e. weather phenomena observed at the
aerodrome during the period since the last issued routine
report or last hour, whichever is the shorter, but not at the time
of observation, should be reported, up to a maximum of three
p u p s , in the supplementary information:
25/11/04 APP 3-10
Appendu 3 Annex 3 - Meteorological Service for International Air Navigation
- freezing precipitation REFZDZ, REFZRA
- moderate or heavy precipitation REDZ, RERA, RESN,
(including showers thereof) RESG, REPL, RESHRA,
RESHSN, RESHGR,
RESHGS
- blowing snow REBLSN
- duststorm, sandrtorm REDS, RESS
- thunderstorm RETS
- finnel cloud (tornado or REFC
water spout)
- volcanic ash RE VA.
4.8.1.2 Recommendation.- In local routine and special
reports, the following significant meteorological conditions, or
combinations thereoj: should be reported in supplementary
information:
- cumulonimbus cloudr CB
- thunderstorm TS
- moderate or severe turbulence MOD TURB, SE V TURB
- wind shear WS
- hail GR
- severe squall line SE V SQL
- moderate or severe icing MOD ICE, SE V ICE
- freezing precipitation FZDZ, FZRA
- severe mountain waves SE V MTW
- duststorm, sandrtorm DS, SS
- blowing snow BLSN
- finnel cloud (tornado or FC.
water spout)
The location of the condition should be indicated. Where
necessary, additional information should be included using
abbreviated plain language.
4.8.1.3 Recommendation, In METAR and SPECI,
where local circumstances so warrant, information on wind
shear should be added.
Note.- The local circumstances referred to in 4.8.1.3
include, but are not necessarily limited to, wind shear of a
nun-transitory nature such as might be associated with lowlevel
temperature inversions or local topography.
4.8.1.4 Recommendation.- In METAR and SPECI, the
following information should be included in the supplementary
information, in accordance with regional air navigation
agreement:
a) information on sea-surface temperature and the state of
the sea from aeronautical meteorological stations established
on of-shore structures in support of helicopter
operations; and
b) information on the state of the runway provided by the
appropriate airport authority.
Note 1.- The state of the sea is speczFed in WMO
Publication No. 306, Manual on Codes, Volume 1.1, Part A -
Alphanumeric Codes, Code Table 3700.
Note 2.- The state of the runway is spec@ed in WMO
Publication No. 306, Manual on Codes, Volume 1.1. Part A -
Alphanumeric Codes, Code Tables 0366, 0519, 0919 and
1079.
4.9 Meteorological information
from automatic observing systems
4.9.1 Reporting
4.9.1.1 Recommendation.- In automated METAR and
SPECI, surface wind, runway visual range, air temperature
and dew-point temperature, and atmospheric pressure should
be reported in accordance with provisions relevant to METAR
and SPECI included in Sections 4.1, 4.3, 4.6 and 4.7,
respectively.
4.9.1.2 Recommendation.- In automated METAR and
SPECI, visibiliry should be reported in accordance with provisions
relevant to METAR and SPECI included in Section 4.2.
However, when visibility sensors are sited in such a manner
that no .directional variations can be given, visibility value
reported should be followed by the abbreviation "NDV".
4.9.1.3 Recommendation.- In automated METAR and
SPECI, present weather should be reported in accordance with
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