周子堯@FB

基本資料  
編號               ：93 W
擾動編號日期 ：2023 年 08 月 02 日 20 時
撤編日期        ：2023 年 00 月 00 日 00 時
93W INVEST 230802 1200 30.0N 148.0E WPAC 15 1009

t02436

JTWC判定為副熱帶低壓

(1) THE AREA OF CONVECTION (INVEST 93W) PREVIOUSLY LOCATED NEAR
30.6N 149.0E IS NOW LOCATED NEAR 32.3N 148.6E, APPROXIMATELY 481 NM
EAST-SOUTHEAST OF YOKOSUKA, JAPAN. THE SYSTEM IS CURRENTLY CLASSIFIED
AS A SUBTROPICAL DEPRESSION, GENERALLY CHARACTERIZED AS HAVING BOTH
TROPICAL AND MIDLATITUDE CYCLONE FEATURES. ANIMATED MULTISPECTRAL
SATELLITE IMAGERY SHOWS DEEP CONVECTION AND SHALLOW RAIN BANDS
WRAPPING INTO A FULLY-EXPOSED LOW-LEVEL CIRCULATION. THE ASYMMETRIC
WIND BAND AND ASSOCIATED DEEP CONVECTION ARE CONFINED NORTH AND EAST
OF THE LLC DUE TO A STRONG UPPER-LEVEL TROUGH JUST TO THE SOUTHWEST.
ENVIRONMENTAL ANALYSIS INDICATES INVEST 93W IS IN A MARGINAL AREA FOR
DEVELOPMENT UNDER STRONG SOUTHERLY FLOW ALOFT WITH HIGH (30-
40KT) VWS OFFSET BY WARM (29C) SEA SURFACE TEMPERATURES. GLOBAL MODELS
ARE IN GENERAL AGREEMENT THAT 93W WILL TRACK NORTHWARD OVER THE NEXT
72 HOURS WELL EAST OF HONSHU, ACCOMPANIED CLOSELY BY THE
AFOREMENTIONED UPPER-LEVEL TROUGH, WHICH IS EXPECTED TO MAINTAIN
STRONG SOUTHERLY VWS AND DRY AIR OVER THE CYCLONE. FOR HAZARDS AND
WARNINGS, REFERENCE THE FLEET WEATHER CENTER SAN DIEGO HIGH WINDS AND
SEAS PRODUCT OR REFER TO LOCAL WMO DESIGNATED FORECAST AUTHORITY.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 23 TO 28 KNOTS.
MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1009 MB. THE
POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN
THE NEXT 24 HOURS REMAINS LOW.