簽到天數: 1650 天 [LV.Master]伴壇終老
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老農民版夜神月|2019-9-8 17:24
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JTWC08/0600Z評級Medium
(2) THE AREA OF CONVECTION (INVEST 96W) PREVIOUSLY LOCATED
NEAR 27.2N 124.6E IS NOW LOCATED NEAR 28.8N 125.3E, APPROXIMATELY
267 SOUTH-SOUTHWEST OF CHEJU ISLAND, SOUTH KOREA. THIS SYSTEM IS
ASSESSED AS A SUBTROPICAL CYCLONE AND IS LOCATED UNDER A SHARP UPPER-
LEVEL SUBTROPICAL SHORTWAVE TROUGH EVIDENT AT 200MB AND 500MB.
ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS AN ASYMMETRIC,
EXPOSED LOW-LEVEL CIRCULATION (LLC) WITH FLARING DEEP CONVECTION
SHEARED OVER THE NORTH QUADRANT. A 080454Z AMSR2 36GHZ MICROWAVE
IMAGE REVEALS A BROAD, WEAKLY DEFINED LLC WITH WEAK BANDING
DISPLACED TO THE NORTH. A 080115Z PARTIAL ASCAT IMAGE SHOWS A BROAD
CIRCULATION WITH 25 TO 30 KNOT WINDS OVER THE WESTERN SEMICIRCLE.
UPPER-LEVEL ANALYSIS INDICATES A MARGINAL ENVIRONMENT WITH MODERATE
TO HIGH (20-25 KNOTS) SOUTHERLY VERTICAL WIND SHEAR AND WEAK
POLEWARD DIVERGENCE. GLOBAL MODELS INDICATE THE SUBTROPICAL SYSTEM
SHOULD TRACK POLEWARD WITH GRADUAL DEVELOPMENT BUT A LOW PROBABILITY
FOR TRANSITIONING INTO A WARM-CORE TROPICAL SYSTEM. MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 25 TO 30 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1002 MB. THE POTENTIAL FOR
THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS IS UPGRADED TO MEDIUM.
並於08/00Z時開始認定此系統為副熱帶低壓
WP, 96, 2019090712, , BEST, 0, 261N, 1244E, 15, 1010, DB, 0, , 0, 0, 0, 0, 1004, 125, 30, 0, 0, , 0, , 0, 0, INVEST, ,
WP, 96, 2019090718, , BEST, 0, 270N, 1250E, 20, 1003, DB, 0, , 0, 0, 0, 0, 1005, 110, 30, 0, 0, W, 0, , 0, 0, INVEST, S,
WP, 96, 2019090800, , BEST, 0, 279N, 1252E, 25, 1000, SD, 0, , 0, 0, 0, 0, 1005, 110, 30, 0, 0, W, 0, , 0, 0, INVEST, S,
WP, 96, 2019090806, , BEST, 0, 291N, 1251E, 30, 996, SD, 34, NEQ, 0, 0, 0, 0, 1004, 160, 30, 0, 0, W, 0, , 0, 0, INVEST, S,
此外,JMA亦於06Z發布[W]
WARNING.
TROPICAL DEPRESSION 1000 HPA
AT 29.5N 124.9E EAST CHINA SEA MOVING NORTH 10 KNOTS.
POSITION FAIR.
MAX WINDS 30 KNOTS NEAR CENTER.
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