BendixKing KAC 503 - Supplemental System FIS - Manual (Page 15)

Rev 1 Oct. 2003
11
3. Date and Time Issued: 041430.
04 indicates the 4th day of the month. 1430 indicates UTC.
4. This line indicates that SIGMET ROMEO 1 is VALID UNTIL the 4th day
(04) of the month at 1830 UTC.
Each subsequent report issued for this same weather phenomenon
designated ROMEO would increment the number. For example,
ROMEO 2, ROMEO 3 and so on.
5. Area of coverage by state or geographic area. In addition to state
abbreviations, other area abbreviations may be seen here, such as, TX
CSTL WTRS (Texas Coastal Waters).
6. Location of weather phenomenon. Three letter designators for navaids
or airports are used to describe boundaries of coverage. If the weather
phenomenon extends across multiple forecast areas, the location is
described as if no boundaries exist.
7. Details of weather phenomenon. The example is typical of a synopsis
for turbulence:
OCNL (occasional) SEV (severe) TURB (turbulence) BTN (between)
300 (30,000 feet) AND 360 (36,000 feet). RPRTD (reported) BY AIR-
CRAFT. CONDS (conditions) CONTG (continuing) BYD (beyond
1830Z.
More typical examples of descriptors used in other SIGMET weather
phenomenon are as follows:
MOD (moderate) TO
STG (strong) UDDFS (updrafts and downdrafts)
UPDFTS (updrafts)
DWNDFTS (downdrafts)
INVOF (in vicinity of) MTNS (mountains)
BLO (below) 360
BTWN (between) FRZLVL (freezing level) AND 360
ABV (above) 360
RPRTD (reported) BY ACFT(aircraft) IN VCNTY (vicinity)
RPRTD BY SVRL (several) ACFT
8. Issuers initials.
If conditions end more than one half hour prior to the indicated expiration
time, and the report does not state that conditions will continue, a cancella-
tion will be issued with CNCL SIGMET as the report designator. If condi-
tions are expected to continue, a new SIGMET will be issued. If conditions
end within one half hour of the indicated expiration time, the SIGMET will be
allowed to expire without cancellation.