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本帖最後由 妮妲 於 2013-6-20 13:15 編輯
WTPN21 PGTW 200430MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//SUBJ/TROPICAL CYCLONE FORMATION ALERT//RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN150 NM EITHER SIDE OF A LINE FROM 15.6N 118.0E TO 19.3N 116.0E WITHIN THE NEXT 03 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 15 TO 20 KNOTS. METSAT IMAGERY AT 200400Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 15.8N 118.0E. THE SYSTEM IS MOVING NORTHEASTWARD AT 08 KNOTS.
2. REMARKS: THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 12.5N 115.6E IS NOW LOCATED NEAR 15.8N 118.0E, APPROXIMATELY 185 NM WEST-NORTHWEST OF MANILA, PHILIPPINES. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS A PARTIALLY-EXPOSED, CONSOLIDATING LOW-LEVEL CIRCULATION CENTER (LLCC) WITH CURVED DEEP CONVECTIVE BANDING OVER THE SOUTHERN SEMI-CIRCLE WRAPPING INTO THE SOUTHEAST QUADRANT OF THE LLCC. A 192215Z SSMIS IMAGE ALSO SHOWS THAT THE LLCC IS ORGANIZING WITH A MORE DEFINED STRUCTURE. UPPER-LEVEL ANALYSIS DEPICTS A MARGINAL ENVIRONMENT WITH MODERATE TO STRONG (15 TO 25 KNOTS) VERTICAL WIND SHEAR (VWS) OFFSET BY FAIR OUTFLOW. TWO SHIP OBSERVATIONS AT 20/00Z (100 NM NNW AND 80 NM ESE) CONTINUE TO INDICATE 22 TO 32 KNOT SUSTAINED PERIPHERAL WINDS AND SLP AS LOW AS 1003 MB; HOWEVER, CORE WINDS AND STRUCTURE ARE BEGINNING TO CONSOLIDATE. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1001 MB. BASED ON THE FORECAST TRACK NORTHWARD INTO LOWER VWS, 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 210430Z.//NNNN(報文是指這個嗎?)
JTWC也發布TCFA囉~
看來真的有可能再來一個短命颱了...
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