EXAMPLE OF SIGMET FOR TROPICAL CYCLONE
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YUCC SIGMET CO3 VALID 251600/252200 YUDO —
YUCC AMSWELL FIR TC GLORIA PSN N2706 W07306 CB OBS AT 1600Z WI 250NM
OF TC CENTRE TOP FL500 NC FCST AT 2200Z TC CENTRE PSN N2740 W07345 Meaning: The third tropical cyclone SIGMET issued
for the AMSWELL* flight information region (identified by YUCC Amswell area
control centre) by the Donlon/International* meteorological watch office (YUDO)
since 0001 UTC; the SIGMET is valid from 16.00 UTC to 22.00 UTC on the 25th
of the month; tropical cyclone Gloria at 27 degrees 6 minutes north and 73
degrees 6 minutes west; cumulonimbus was observed at 16.00 UTC within 250
nautical miles of the centre of the tropical cyclone with top at flight
level 500; no changes in intensity are expected; at 22.00 UTC, the centre of
the tropical cyclone is forecast to be located at 27 degrees 40 minutes north
and 73 degrees 45 minutes west * Fictitious
locations |
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