ALERT ATCF MIL 98X XXX 211023180000 2021102318 10.2 141.4 18.0 139.8 190 11.4 140.1 232130 2110232121 1 SUBJ/TROPICAL CYCLONE FORMATION ALERT// WTPN21 PGTW 232130 RMKS/ 1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN 190 NM EITHER SIDE OF A LINE FROM 10.2N 141.4E TO 18.0N 139.8E WITHIN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY ISSUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME. WINDS IN THE AREA ARE ESTIMATED TO BE 18 TO 23 KNOTS. METSAT IMAGERY AT 232100Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 11.4N 140.1E. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 07 KNOTS. 2. REMARKS: MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1005 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS HIGH. 3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY 242130Z. // 9821102200 79N1455E 15 9821102206 87N1446E 15 9821102212 96N1438E 15 9821102218 105N1431E 15 9821102300 108N1424E 20 9821102306 110N1416E 20 9821102312 112N1408E 20 9821102318 114N1401E 20 NNNN