TCFA issued.
WTPS21 PGTW 272100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT REISSUED//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/262051ZJAN2018//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
160 NM EITHER SIDE OF A LINE FROM 11.7S 156.4E TO 18.8S 160.4E
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 28 TO 33 KNOTS. METSAT
IMAGERY AT 271800Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 15.3S 159.6E. THE SYSTEM IS MOVING SOUTHEASTWARD AT 08 KNOTS.
2. REMARKS: THE AREA OF CONVECTION (INVEST 93P) PREVIOUSLY LOCATED
NEAR 11.9S 156.8E IS NOW LOCATED NEAR 15.3S 159.6E, APPROXIMATELY
520NM WEST-NORTHWEST OF PORT VILA, VANUATU. ANIMATED MULTISPECTRAL
SATELLITE IMAGERY AND A 271719Z SSMIS 91GHZ IMAGE DEPICT
DEEP BUT RAGGED CONVECTIVE BANDING NEAR AND TO THE NORTHEAST OF THE
LOW-LEVEL CIRCULATION CENTER (LLCC). UPPER-LEVEL ANALYSIS INDICATES
93P IS LOCATED BETWEEN A DEEP MID-LATITUDE TROUGH TO THE WEST, WHICH
IS CREATING MODERATE TO STRONG (25-30 KNOT) VERTICAL WIND SHEAR
(VWS) OVER THE SYSTEM AND DISPLACING THE LARGE SWATH OF 30 KNOT
SURFACE WINDS TO THE EAST OF THE LLCC. HOWEVER, WARM SEA SURFACE
TEMPERATURES (28-30 CELSIUS) COMBINED WITH GOOD EQUATORWARD AND
POLEWARD OUTFLOW IS SUSTAINING DEEP CONVECTION, AND A TROPICAL
CYCLONE COULD FORM AS SOON AS THE VWS ABATES SLIGHTLY AND ALLOWS THE
WARM CORE OF THE SYSTEM TO ORGANIZE AROUND THE LLCC. GLOBAL MODELS
ARE IN GOOD AGREEMENT THAT 93P WILL CONTINUE TO TRACK TOWARD THE
SOUTH-SOUTHEAST WITH POTENTIAL FOR DEVELOPMENT INTO A TROPICAL
CYCLONE WITHIN 24 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE
ESTIMATED AT 28 TO 33 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED
TO BE NEAR 994 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS HIGH.
THIS SUPERSEDES REF A.
