GM3 MET.TR.250(a) SIGMET

• ED Decision 2020/008/R found in: ATM/ANS Provision of Services (2017/373) (Mar 2025)

GM3 MET.TR.250(a) SIGMET ED Decision 2020/008/R EXAMPLE OF SIGMET FOR TROPICAL CYCLONE <table border="1" cellpadding="0" cellspacing="0" width="100%"><tr><td valign="top" width="100%"><p>YUCC SIGMET CO3 VALID 251600/252200 YUDO — </p><p>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</p><p>Meaning:</p><p>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 25^th 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</p><p>* Fictitious locations</p></td></tr></table> GM3 MET.TR.250(a) SIGMET ED Decision 2020/008/R EXAMPLE OF SIGMET FOR TROPICAL CYCLONE <table border="1" cellpadding="0" cellspacing="0" width="100%"> <tr> <td valign="top" width="100%"> <p>YUCC SIGMET CO3 VALID 251600/252200 YUDO — </p> <p>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</p> <p>Meaning:</p> <p>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 25^th 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</p> <p>* Fictitious locations</p> </td> </tr> </table>