ABPW10 PGTW 180600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/180600Z-190600ZMAY2026//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 98W) PREVIOUSLY LOCATED NEAR 
20.7N 130.6E IS NOW LOCATED NEAR 22.3N 129.8E, APPROXIMATELY 275 NM 
SOUTH-SOUTHEAST OF KADENA AFB. THE SYSTEM IS CURRENTLY CLASSIFIED AS A 
SUBTROPICAL DISTURBANCE, GENERALLY CHARACTERIZED AS HAVING BOTH TROPICAL 
AND MIDLATITUDE CYCLONE FEATURES. ANIMATED MULTISPECTRAL SATELLITE 
IMAGERY DEPICTS A BROAD AND HIGHLY ELONGATED LOW-LEVEL CIRCULATION WITH 
FLARING CONVECTION PRIMARILY CONFINED TO THE FAR EASTERN PERIPHERY. 98W 
IS SITUATED UNDERNEATH A SHARP UPPER-LEVEL TROUGH WITH THE TROUGH AXIS 
EXTENDING UP TOWARD KYUSHU. THE STRONGEST WINDS ASSOCIATED WITH THE 
SYSTEM ARE LOCATED WITHIN THE NORTHERN PORTION OF THE CIRCULATION WITH 
SURFACE OBSERVATIONS FROM KADENA AFB REPORTING SUSTAINED WINDS OF 15-20 
KTS FROM THE NORTHEAST. ENVIRONMENTAL ANALYSIS DEPICTS AN UNFAVORABLE 
ENVIRONMENT FOR DEVELOPMENT WITH DRY AIR ENTRAINMENT, MODERATE POLEWARD 
UPPER-LEVEL OUTFLOW, HIGH VERTICAL WIND SHEAR (25-30 KTS), AND WARM SEA 
SURFACE TEMPERATURES (27-28 C). GLOBAL DETERMINISTIC AND ENSEMBLE MODELS 
DEPICT 98W TRACKING NORTH-NORTHWESTWARD, TOWARD THE CENTRAL AND NORTHERN 
RYUKYU ISLANDS OVER THE NEXT 24-48 HOURS. MODELS AGREE ON LITTLE 
DEVELOPMENT OF THE SYSTEM AS THE TROUGH PROPAGATES EASTWARD AND INDUCES 
SIGNIFICANT NORTHERLY SHEAR OVER THE SYSTEM. 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 1007 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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