WTPN21 PHNC 161430
MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE FORMATION ALERT 161421Z JUL 06//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
120 NM EITHER SIDE OF A LINE FROM 12.4N 106.1W TO 13.2N 109.8W
WITHIN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY
ISSUANCE OF A NUMBERED TROPICAL CYCLONE WARNING AT THIS TIME.
WINDS IN THE AREA ARE ESTIMATED TO BE 20 TO 25 KNOTS. METSAT IM-
AGERY AT 161200Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 12.4N 106.2W. THE SYSTEM IS MOVING WESTWARD AT 11 KNOTS.
2. REMARKS: AN AREA OF CONVECTION NEAR 12.4N 106.2W, APPROXIMATELY
450 NM SOUTHWEST OF ACAPULCO, MEXICO, HAS PERSISTED OVER THE PAST 12
HOURS. RECENT ANIMATED INFRARED SATELLITE IMAGERY AND A 161139Z TRMM
MICROWAVE PASS SHOW SPIRALING CONVECTION WRAPPING INTO A WELL-DEFINED
LOW LEVEL CIRCULATION CENTER (LLCC). UPPER LEVEL ANALYSIS INDICATES
LOW VERTICAL WIND SHEAR AND FAVORABLE OUTFLOW ALOFT. MAXIMUM SUSTAINED
SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL
PRESSURE IS ESTIMATED TO BE NEAR 1005 MB. THE POTENTIAL FOR THE FOR
THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS IS GOOD.
3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY
171430Z.//
NEXT NAME: DANIEL