ABPW10 PGTW 140600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/140600Z-150600ZSEP2023//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 93W) PREVIOUSLY LOCATED NEAR 
25.4N 153.1E IS NOW A SUBTROPICAL DEPRESSION. REFER TO 1.C.(1) FOR MORE 
INFORMATION.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 93W) PREVIOUSLY LOCATED NEAR 
25.4N 153.1E IS NOW LOCATED NEAR 35.3N 152.6E, APPROXIMATELY 620 NM EAST-
SOUTHEAST OF MISAWA, JAPAN. THE SYSTEM IS CURRENTLY CLASSIFIED AS A 
SUBTROPICAL DEPRESSION, GENERALLY CHARACTERIZED AS HAVING BOTH TROPICAL 
AND MIDLATITUDE CYCLONE FEATURES. ANIMATED MULTISPECTRAL SATELLITE 
IMAGERY (MSI) DEPICTS A BROAD PARTIALLY EXPOSED LOW LEVEL CIRCULATION 
(LLC) WITH MULTIPLE VORTICES AND FLARING CONVECTION ALONG THE NORTHERN 
AND EASTERN PORTIONS WITH COMMA CLOUD TYPE SHAPE. AN EARLIER PARTIAL 
SCATTEROMETER PASS REVEALED LARGE SWATHS OF 20-25 KNOT WIND FIELDS ALONG 
THE NORTHERN PERIPHERY WITH WEAK 05-10 ON THE WESTERN AND SOUTHERN SIDES 
WRAPPING TOWARDS THE LLC. A 500MB LOW JUST SOUTHWEST OF THE LLC CONTINUES 
TO BRING DOWN DRY AIR OVER AND WITHIN THE SYSTEM THUS CONTINUING TO KEEP 
IT TAME FOR THE MOMENT.  ENVIRONMENTAL ANALYSIS SHOWS A NEUTRAL 
ENVIRONMENT THAT WILL NOT HINDER NOR BOOST 93W. THIS IS BACKED BY WARM 
(27C) SST, NEUTRAL (20KT) VWS, AND LACK LUSTER UPPER LEVEL OUTFLOW. 
GLOBAL MODELS AGREE ON 93W MOVING QUICKLY POLEWARD AND BECOMING MORE IN 
PHASE WITH THE LONG WAVE PATTERN WITH NO INTENSIFICATION EXPECTED OVER 
THE NEXT 24 HOURS. 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 28 TO 33 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO 
BE NEAR 1008 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT 
TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS LOW.
      (2) NO OTHER SUBTROPICAL SYSTEMS.
2. SOUTH PACIFIC AREA (WEST COAST OF SOUTH AMERICA TO 135 EAST):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.//
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