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krichard2011|2024-9-20 16:34
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JTWC針對90W發布TCFA
- WTPN21 PGTW 200600
- MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
- SUBJ/TROPICAL CYCLONE FORMATION ALERT (INVEST 90W)//
- RMKS/
- 1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN 180 NM
- EITHER SIDE OF A LINE FROM 21.2N 127.6E TO 26.0N 123.0E 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 200530Z INDICATES THAT A
- CIRCULATION CENTER IS LOCATED NEAR 21.7N 127.1E. THE SYSTEM IS MOVING
- NORTHWESTWARD AT 07 KNOTS.
- 2. REMARKS: THE AREA OF CONVECTION (INVEST 90W) PREVIOUSLY LOCATED NEAR
- 21.2N 127.6E IS NOW LOCATED NEAR 21.7N 127.1E, APPROXIMATELY 368 NM
- EAST-SOUTHEAST OF TAIPEI, TAIWAN. ANIMATED VISIBLE SATELLITE IMAGERY
- DEPICTS EXPOSED LOW LEVEL CLOUD LINES WRAPPING INTO A DEFINED
- CIRCULATION CENTER. CONVECTION IS FLARING IN THE SOUTHERN QUADRANT WITH
- ANVILS SHEARED TO THE SOUTH. A PARTIAL SCATTEROMETRY PASS SHOWS THE
- SYSTEM IS FORMING ADJACENT TO AN EXTENSIVE BELT OF 20-30 KNOT
- SOUTHEASTERLY WINDS TO THE EAST OF THE CIRCULATION. DETERMINISTIC AND
- PROBABILISTIC MODELS DEPICT A DEEPENING SYSTEM FORMING BESIDE THE WIDE
- SWATH OF VIGOROUS LOW-LEVEL FLOW AND HEADING GENERALLY NORTHWESTWARD.
- GLOBAL MODELS INDICATE SLOW DEVELOPMENT; HOWEVER, THEY DO INDICATE A
- POSSIBILITY FOR THE STRONGER WINDS TO THE EAST TO WRAP AROUND THE
- CIRCULATION. ENVIRONMENTAL CONDITIONS ARE MARGINALLY FAVORABLE WITH
- MODERATE EQUATORWARD OUTFLOW ALOFT, MODERATE TO HIGH (20-25 KNOTS)
- VERTICAL WIND SHEAR AND WARM (30-31 C) SEA SURFACE TEMPERATURES CREATING
- A CONDUCIVE AREA FOR FURTHER DEVELOPMENT MOVING FORWARD. 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
- 210600Z.//
- NNNN
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