ALERT ATCF MIL 95X XXX 210624120000 2021062412 13.1 261.9 15.6 257.0 150 13.3 261.6 241430 2106241421 1 SUBJ/TROPICAL CYCLONE FORMATION ALERT REISSUED // WTPN21 PHNC 241430 REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/231421Z JUN 21// AMPN/REF IS TROPICAL CYCLONE FORMATION ALERT (WTPN21 PHNC 231430)// RMKS/ 1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN 150 NM EITHER SIDE OF A LINE FROM 13.1N 98.1W TO 15.6N 103.0W 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 20 TO 25 KNOTS. METSAT IMAGERY AT 241200Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 13.3N 98.4W. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 09 KNOTS. 2. REMARKS: MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1004 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS HIGH. THIS SUPERSEDES REF A. 3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY 251430Z. // 9521062200 81N 843W 15 9521062206 86N 865W 15 9521062212 91N 886W 15 9521062218 96N 907W 15 9521062300 104N 927W 20 9521062306 111N 941W 20 9521062312 117N 950W 25 9521062318 121N 959W 25 9521062400 124N 969W 25 9521062406 129N 978W 25 9521062412 133N 984W 25 NNNN