WTPN21 PGTW 302130 RMKS/ 1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN 075 NM EITHER SIDE OF A LINE FROM 17.4N 112.1E TO 21.5N 112.3E 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 301800Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 17.5N 112.1E. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 02 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 312130Z. // 9424052912 181N1124E 15 9424052918 179N1123E 15 9424053000 176N1126E 15 9424053006 174N1127E 20 9424053012 174N1123E 20 9424053018 175N1121E 20 NNNN