WTPS21 PGTW 300030
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
140 NM EITHER SIDE OF A LINE FROM 12.7S 144.7E TO 13.0S 138.8E
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 292300Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 12.8S 144.4E. THE SYSTEM IS MOVING SOUTHWESTWARD AT 03
KNOTS.
2. REMARKS: THE AREA OF CONVECTION (INVEST 95P) PREVIOUSLY LOCATED
NEAR 12.2S 144.3E, IS NOW LOCATED NEAR 12.8S 144.4E, APPROXIMATELY
145 NM EAST OF WEIPA, AUSTRALIA. ANIMATED MULTISPECTRAL SATELLITE
IMAGERY AND A 292045Z SSMIS 91 GHZ MICROWAVE IMAGE DEPICT A BROAD
CIRCULATION WITH DEEP PERSISTING CONVECTION TO THE SOUTH AND SEVERAL
AREAS OF FLARING CONVECTION TO THE NORTH AND EAST. THE DISTURBANCE
IS CURRENTLY LOCATED IN AN AREA OF EXCELLENT POLEWARD AND
EQUATORWARD UPPER LEVEL DIVERGENCE, MODERATE VERTICAL WIND SHEAR (15-
25 KNOTS), AND WARM SEA SURFACE TEMPERATURES (28-30 CELSIUS). GLOBAL
MODELS SHOW TWO SEPARATE SOLUTIONS. THE MOST FAVORED SOLUTION SHOWS
THE SYSTEM TRACKING WEST INTO THE GULF OF CARPENTARIA, INTENSIFYING
QUICKLY, THEN TRACKING BACK EAST. THE LESS FAVORED SOLUTION SHOWS
THE SYSTEM CONTINUING WESTWARD BEFORE BECOMING QUASI-STATIONARY AND
INTENSIFYING IN THE CORAL SEA BEFORE TRACKING EAST. 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.
3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY
310030Z.//
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