EXAMPLE OF SIGMET FOR
VOLCANIC ASH
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YUDD SIGMET AO2 VALID 101200/101800 YUSO– YUDD SHANLON FIR VA ERUPTION MT ASHVAL PSN
N4315 E02115 VA CLD OBS AT 1200Z WI N4315 E02115 - N4345 E02145 – N4330
E02215 – N4245 E02230 - N4230 E02145 - N4315 E02115 FL250/370 WKN FCST AT
1800Z NO VA EXP= Meaning: The second volcanic ash SIGMET issued for
the SHANLON* flight information region (identified by YUDD Shanlon area
control centre/upper flight information region) by the
Shanlon/International* meteorological watch office (YUSO) since 00.01 UTC;
the SIGMET is valid from 12.00 UTC to 18.00 UTC on the 10th of the month;
volcanic ash eruption of Mount Ashval* located at 43 degrees 15 minutes
north and 21 degrees 15 minutes east; volcanic ash cloud observed at 12.00
UTC within an area bounded by 43 degrees 15 minutes north and 21 degrees 15
minutes east to 43 degrees 30 minutes north and 22 degrees 15 minutes east
to 42 degrees 45 minutes north and 22 degrees 30 minutes east to 42 degrees
30 minutes north and 21 degrees 45 minutes east to 43 degrees 15 minutes north
and 21 degrees 15 minutes east between flight levels 250 and 370, weakening,
and forecast at 18.00 UTC to have dissipated with no volcanic ash expected. * Fictitious
locations |
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