簽到天數: 3206 天 [LV.Master]伴壇終老
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king111807|2021-10-10 01:16
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JTWC發布TCFA
WTPN23 PGTW 091400
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT (INVEST 95W)//
REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/081521ZOCT21//
REF/B/JOINT TYPHOON WRNCEN PEARL HARBOR HI/081921ZOCT21//
AMPN/REFS A AND B ARE TROPICAL CYCLONE FORMATION ALERTS//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
145 NM EITHER SIDE OF A LINE FROM 16.5N 162.4E TO 18.3N 156.6E
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 18 TO 23 KNOTS. METSAT
IMAGERY AT 091200Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 16.6N 162.0E. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 08
KNOTS.
2. REMARKS: THE AREA OF CONVECTION (INVEST 95W) PREVIOUSLY LOCATED
NEAR 16.5N 164.3E IS NOW LOCATED NEAR 16.6N 162.0E, APPROXIMATELY
310NM WEST-NORTHWEST OF WAKE ISLAND. ANIMATED ENHANCED INFRARED
SATELLITE IMAGERY DEPICTS EXTENSIVE FLARING CONVECTION OBSCURING A
LOW LEVEL CIRCULATION. A 090824Z PARTIAL ASCAT-A PASS SHOWS 15-20 KT
WIND BARBS AROUND A LOW LEVEL CIRCULATION WITH GREATER THAN 20 KT
WIND BARBS IN THE NORTHERN AND EASTERN PERIPHERY ASSOCIATED WITH
GRADIENT FLOW AND CONVECTION, RESPECTIVELY. ENVIRONMENTAL ANALYSIS
INDICATES FAVORABLE CONDITIONS FOR DEVELOPMENT WITH ROBUST
EQUATORWARD AND POLEWARD OUTFLOW, LOW (10-15KT) VERTICAL WIND SHEAR,
AND WARM SEA SURFACE TEMPERATURES (29-30C). GLOBAL MODELS ARE IN
GOOD AGREEMENT THAT 95W WILL TRACK WEST-NORTHWESTWARD AS IT
INTENSIFIES BEFORE RECURVING TO THE NORTH-NORTHEAST. MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1005 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
101400Z.
4. SEE REF A FOR DETAILS ON A TROPICAL CYCLONE FORMATION ALERT
LOCATED NEAR 12.6N 131.9E. SEE REF B FOR DETAILS ON A TROPICAL
CYCLONE FORMATION ALERT LOCATED NEAR 17.2N 133.5E. //
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