ABPW10 PGTW 230600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS 230600Z-240600ZDEC2024//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/230151ZDEC2024//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 23DEC24 0000Z, TROPICAL DEPRESSION 28W (TWENTYEIGHT) WAS 
LOCATED NEAR 10.9N 112.7E, APPROXIMATELY 354 NM EAST OF HO CHI MINH 
CITY, VIETNAM, AND HAD TRACKED NORTHWESTWARD AT 07 KNOTS OVER THE PAST 
SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 30 KNOTS 
GUSTING TO 40 KNOTS. SEE REF A (WTPN31 PGTW 230300) FOR FURTHER 
DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
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:
      (1) THE SYSTEM IS CURRENTLY ASSESSED AS A SUBTROPICAL CYCLONE, 
GENERALLY CHARACTERIZED AS HAVING BOTH TROPICAL AND MIDLATITUDE CYCLONE 
FEATURES.THE AREA OF CONVECTION (INVEST 96P) PREVIOUSLY LOCATED NEAR 
20.4S 156.2E IS NOW LOCATED NEAR 20.4S 156.2E, APPROXIMATELY 591 NM WEST 
OF NOUMEA. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) AND A 230358Z 
GMI 89GHZ MICROWAVE SATTELITE IMAGE DEPICT AN ELONGATED, EXPOSED LOW 
LEVEL CIRCULATION CENTER (LLCC). ENVIRONMENTAL ANALYSIS REVEALS AN 
UNFAVORABLE ENVIRONMENT FOR TROPICAL DEVELOPMENT WITH A TIGHT GRADIENT 
OF VERTICAL WIND SHEAR OF 10-30 KNOTS ASSOCIATED WITH THE MID-LATITUDE 
WESTERLIES, WEAK UPPER-LEVEL OUTFLOW AND WARM SEA SURFACE TEMPERATURES 
OF 27-28 C. GLOBAL DETERMINISTIC AND ENSEMBLE MODELS INDICATE THAT 
INVEST 96P WILL UNDERGO LIMITED DEVELOPMENT OVER THE NEXT 24-48 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.
      (2) NO OTHER SUBTROPICAL SYSTEMS.
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