簽到天數: 3280 天 [LV.Master]伴壇終老
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t02436|2016-5-27 15:28
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JTWC 0530Z 取消TCFA，降評MediumWTPN21 PGTW 270500
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT//
REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/260500Z MAY 16//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT (WTPN21 PGTW
260500)//
RMKS/
1. REMARKS: THIS CANCELS REF A (WTPN21 PGTW 260500). ANIMATED
MULTISPECTRAL SATELLITE IMAGERY DEPICTS A BROAD AREA OF CONVECTION
BECOMING INCREASINGLY DISORGANIZED WITH A PARTIALLY EXPOSED LOW
LEVEL CIRCULATION CENTER (LLCC). RECENT MICROWAVE IMAGERY CONFIRMS
THE PRESENCE OF A WEAK LLCC, BUT ALSO SHOWS THE DETERIORATION OF THE
OVERALL STRUCTURE IN THE LAST SIX HOURS. VERTICAL WIND SHEAR VALUES
HAVE INCREASED TO ABOUT 15 TO 20 KNOTS AND DIFFLUENCE ALOFT ALSO
REMAINS MARGINAL. THE SYSTEM IS CURRENTLY BEING STEERED NORTHWARD
ALONG THE WESTERN PERIPHERY OF A DEEP-LAYERED SUBTROPICAL RIDGE AND
WILL MAKE LANDFALL IN THE NEXT 6 TO 12 HOURS. MAXIMUM SUSTAINED
SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS . MINIMUM SEA LEVEL
PRESSURE IS ESTIMATED TO BE NEAR 1004 MB. DUE TO THE COMBINATION OF
DEGRADED ENVIRONMENTAL CONDITIONS IN CONJUNCTION WITH EXPECTED LAND
INTERACTION, THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT
TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS DOWNGRADED TO MEDIUM.//
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中心即將登陸中國廣東省
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