ABPW10 PGTW 250600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/250600Z-260600ZMAR2026//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   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 AREA OF CONVECTION (SS 28P) PREVIOUSLY LOCATED NEAR 29.2S 
163.8E IS NOW LOCATED NEAR 34.0S 163.2E, APPROXIMATELY 724NM SOUTH-
SOUTHWEST OF NOUMEA. THE SYSTEM IS CURRENTLY CLASSIFIED AS A SUBTROPICAL 
CYCLONE, GENERALLY CHARACTERIZED AS HAVING BOTH TROPICAL AND MIDLATITUDE 
CYCLONE FEATURES. ANIMATED ENHANCED MULTISPECTRAL SATELLITE IMAGERY 
DEPICTS A WEAK FRONTAL SYSTEM WITH FLARING CONVECTION LOCATED JUST 
POLEWARD OF THE LOW-LEVEL CIRCULATION CENTER (LLCC). THE SYSTEM HAS 
CONTINUED TO BE SHEARED TO THE SOUTH-SOUTHEAST, WITH 30-35 KNOT WINDS 
ALONG THE SOUTHERN PERIPHERY AS WELL AS THE LLCC BECOMING FULLY EXPOSED 
IN THE LAST SIX HOURS. ENVIRONMENTAL ANALYSIS REVEALS UNFAVORABLE 
CONDITIONS FOR TROPICAL TRANSITION MOVING FORWARD, DEFINED BY A DEEP 
LAYER OF MID-LEVEL DRY AIR BEING ENTRAINED THROUGHOUT THE SYSTEMS CORE, 
STRONG OUTFLOW ALOFT, HIGH VERTICAL WIND SHEAR (VWS) OF 40-50 KTS FROM 
THE NORTH-NORTHWEST, AND COOLING SEA SURFACE TEMPERATURES OF 25-26 C. 
GLOBAL MODELS ARE IN AGREEMENT THAT SUBTROPICAL CYCLONE 28P WILL TRACK 
SOUTHWARD AS THE BROAD AND ASYMMETRIC WIND FIELD CONTINUES TO EXPAND 
OVER TIME. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 33 TO 37 
KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1000 MB. THE 
POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN 
THE NEXT 24 HOURS REMAINS LOW.
      (2) NO OTHER SUBTROPICAL SYSTEMS.//
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