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發佈時間: 2020-11-21 02:31

正文摘要:

  基本資料   編號               :96 A 擾動編號日期 :2020 年 11 月 21 日 02 時 撤編日期        :20 ...

dom 發表於 2020-11-21 16:43
JTWC評級提升至medium
(2) THE AREA OF CONVECTION (INVEST 96A) PREVIOUSLY LOCATED
NEAR 7.0N 56.1E IS NOW LOCATED NEAR 6.5N 56.5E, APPROXIMATELY 392 NM
SOUTH-SOUTHEAST OF SOCOTRA. ANIMATED MULTISPECTRAL SATELLITE IMAGERY
DEPICTS AN EXPOSED, WELL-DEFINED LOW-LEVEL CIRCULATION CENTER (LLCC)
WITH FLARING DEEP CONVECTION SHEARED TO THE WEST. A 210621Z MHS
89GHZ MICROWAVE IMAGE INDICATES DISORGANIZED CONVECTION AND A WEAKLY-
DEFINED LLCC. A 210507Z ASCAT-A 25-KM BULLSEYE IMAGE REVEALS A
DEFINED CIRCULATION WITH 20-25 KNOT WINDS AND ISOLATED 25-30 KNOT
WINDS OVER THE NORTHWEST QUADRANT. UPPER-LEVEL ANALYSIS INDICATES A
MARGINAL ENVIRONMENT WITH 20-25 KNOT EASTERLY VERTICAL WIND SHEAR,
ASSOCIATED WITH INVEST 95A'S UPPER-LEVEL ANTICYCLONE, AND BROAD
DIFFLUENCE. INVEST 96A IS LOCATED ABOUT 316 NM SSW OF INVEST 95A AND
APPEARS TO BE UNDERGOING DIRECT CYCLONE INTERACTION (I.E., FUJIWARA)
WITH INCREASING APPROACH VELOCITIES. THE 21/00Z GFS RUN INDICATES
THAT INVEST 96A WILL CONTINUE DIRECT CYCLONE INTERACTION WITH THE
DOMINANT SYSTEM, INVEST 95A, AND WILL TRACK CYCLONICALLY AND GET
ABSORBED INTO THE EASTERN PERIPHERY OF INVEST 95A WITHIN THE NEXT 36
HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 25 TO 30
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 UPGRADED TO MEDIUM.
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