JTWC has issued a TCFA:
WTPN21 PGTW 032030
MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE FORMATION ALERT/032021ZMAR2006//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
120 NM EITHER SIDE OF A LINE FROM 5.0N 138.5E TO 6.1N 136.1E
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 IM
AGERY AT 031730Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 5.1N 138.2E. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 02
KNOTS.
2. REMARKS: AN AREA OF CONVECTION NEAR 5.1N 138.2E, APPROXIMATELY
120 NM EAST-SOUTHEAST OF PALAU, HAS PERSISTED OVER THE PAST 12
HOURS. ANIMATED ENHANCED INFRARED IMAGERY REVEALS DEEP CONVECTION
OVER A TIGHTENING LOW LEVEL CIRCULATION CENTER (LLCC) HAS IN-
CREASED. UPPER LEVEL ANALYSIS SHOWS THAT THE AREA IS UNDER LOW TO
MODERATE VERTICAL WIND SHEAR, HAS AN INCREASINGLY SYMMETRIC
850 MB VORTICITY SIGNATURE, AND HAS EXCELLENT POLEWARD OUTFLOW.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS.
MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE 1002 MB. DUE TO A
FAVORABLE ENVIRONMENT AND CONSOLIDATION OF BOTH THE LLCC AND
CONVECTION, THE POTENTIAL 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
042030Z.//
