ABPW10 PGTW 060600

MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//

SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH

PACIFIC OCEANS/060600Z-070600ZJUN2026//

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 91W) PREVIOUSLY LOCATED NEAR

22.2N 120.2E IS NOW LOCATED NEAR 25.4N 123.1E, APPROXIMATELY 260 NM

WEST-SOUTHWEST OF KADENA, 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 WEAK, DISORGANIZED ROTATION MOVING JUST SOUTH OF

THE MAI-YU/BAIU BOUNDARY CURRENTLY DRAPED ACROSS THE EAST CHINA SEA. 91W

IS FORECASTED TO CONTINUE MOVING RAPIDLY NORTH NORTH-EASTWARD INTO THE

EAST CHINA SEA. ENVIRONMENTAL ANALYSIS FOR THE AREA INDICATES MARGINALLY

FAVORABLE CONDITIONS FOR INTENSIFICATION WITH LOW VERTICAL WIND SHEAR

(10-15 KNOTS), WARM (26-27 C) SEA SURFACE TEMPERATURES (SST), AND GOOD

POLEWARD OUTFLOW ALOFT. THE SYSTEM TRANSITS NORTHEASTWARD IT WILL

ENCOUNTER SIGNIFICANTLY COOLER SSTS SURROUNDING THE KUROSHIO CURRENT, AS

WELL AS INCREASED TEMPERATURE ADVECTION. DETERMINISTIC GUIDANCE SHOWS

91W REACHING PEAK INTENSITY OVER THE NEXT 18 HOURS AS IT PASSES WEST OF

OKINAWA. THE WIND FIELD IS FORECAST TO EXPAND AS IT MOVES THROUGH THE

EAST CHINA SEA, WITH THE HIGHEST WINDS BEING LOCATED IN THE EASTERN

HEMISPHERE OF THE CIRCULATION. MAXIMUM SUSTAINED SURFACE WINDS ARE

ESTIMATED AT 23 TO 28 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO

BE NEAR 1002 MB. FOR HAZARDS AND WARNINGS, REFERENCE THE FLEET WEATHER

CENTER SAN DIEGO HIGH WINDS AND SEAS PRODUCT OR REFER TO LOCAL WMO

DESIGNATED FORECAST AUTHORITY. 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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