WTPN21 PGTW 030300 RMKS/ 1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN 200 NM EITHER SIDE OF A LINE FROM 7.9N 139.3E TO 15.0N 130.5E 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 031730Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 8.6N 138.8E. THE SYSTEM IS MOVING NORTHWESTWARD AT 21 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 040300Z. // 9024110112 55N1472E 15 9024110118 57N1456E 15 9024110200 58N1440E 15 9024110206 62N1422E 15 9024110212 66N1413E 20 9024110218 69N1401E 20 9024110300 86N1388E 20 NNNN