ALERT ATCF MIL 95X XXX 211009120000 2021100912 16.4 162.4 18.3 156.5 170 16.6 162.0 091400 2110091351 3 SUBJ/TROPICAL CYCLONE FORMATION ALERT// WTPN23 PGTW 091400 REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/081521Z OCT 21// AMPN/REF IS TROPICAL CYCLONE FORMATION ALERT (WTPN21 PGTW 081530)// REF/B/JOINT TYPHOON WRNCEN PEARL HARBOR HI/081921Z OCT 21// AMPN/REF IS TROPICAL CYCLONE FORMATION ALERT (WTPN22 PGTW 081930)// RMKS/ 1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN 145 NM EITHER SIDE OF A LINE FROM 16.5N 162.4E TO 18.3N 156.6E 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 091200Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 16.6N 162.0E. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 08 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 101400Z. 4. SEE REF A FOR DETAILS ON A TROPICAL CYCLONE FORMATION ALERT LOCATED NEAR 12.6N 131.9E SEE REF B FOR DETAILS ON A TROPICAL CYCLONE FORMATION ALERT LOCATED NEAR 17.2N 133.5E // 9521100718 142N1671E 15 9521100800 145N1664E 15 9521100806 148N1658E 15 9521100812 151N1651E 15 9521100818 154N1643E 15 9521100900 160N1637E 20 9521100906 164N1628E 20 9521100912 166N1620E 20 NNNN