TROPICAL CYCLONE ADVISORY: ABPW10 PGTW 251300 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH PACIFIC OCEANS REISSUED/251300Z-260600ZAUG2026// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/250751ZAUG2026// REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/250752ZAUG2026// REF/C/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/250753ZAUG2026// NARR/REFS A, B AND C ARE TROPICAL CYCLONE WARNINGS.// RMKS/ 1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA): A. TROPICAL CYCLONE SUMMARY: (1) AT 25AUG26 0600Z, TYPHOON 17W (SAUDEL) WAS LOCATED NEAR 26.8N 130.1E, APPROXIMATELY 125 NM EAST OF KADENA AB, AND HAD TRACKED NORTHWESTWARD AT 11 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 80 KNOTS GUSTING TO 100 KNOTS. SEE REF A (WTPN31 PGTW 250900) FOR FURTHER DETAILS. (2) AT 25AUG26 0600Z, TROPICAL STORM 18W (NARRA) WAS LOCATED NEAR 19.4N 108.2E, APPROXIMATELY 161 NM SOUTHEAST OF HANOI, VIETNAM, AND HAD TRACKED EASTWARD AT 07 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 40 KNOTS GUSTING TO 50 KNOTS. SEE REF B (WTPN32 PGTW 250900) FOR FURTHER DETAILS. (3) AT 25AUG26 0600Z, TROPICAL DEPRESSION 19W (ATSANI) WAS LOCATED NEAR 20.6N 137.3E, APPROXIMATELY 335 NM SOUTHWEST OF IWO TO, AND HAD TRACKED NORTH-NORTHWESTWARD AT 16 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 25 KNOTS GUSTING TO 35 KNOTS. SEE REF C (WTPN33 PGTW 250900) FOR THE FINAL WARNING ON THIS SYSTEM. (4) NO OTHER TROPICAL CYCLONES. B. TROPICAL DISTURBANCE SUMMARY: (1) AN AREA OF CONVECTION (INVEST 99W) HAS PERSISTED NEAR 15.3N 162.3E, APPROXIMATELY 343 NM SOUTHWEST OF WAKE ISLAND. ANIMATED ENHANCED INFRARED IMAGERY (EIR) DEPICTS PERSISTENT CONVECTION EXHIBITING WEAK BANDING AND OBSCURING A LOOSELY DEFINED LOW-LEVEL CIRCULATION CENTER. A 250918Z METOP-B ASCAT PARTIAL PASS REVEALS 20 KT WINDS ALONG THE EASTERN PERIPHERY. A 250720Z 37 GHZ GMI PASS DEPICTS BROAD AND WEAK CURVATURE WITHIN THE LOWER-LEVEL CLOUD STRUCTURE. ENVIRONMENTAL ANALYSIS IS CONDUCIVE FOR DEVELOPMENT WITH LOW VERTICAL WIND SHEAR (10-15 KTS), WARM SEA SURFACE TEMPERATURES (29-30 C), ABUNDANT DEEP-LAYER MOISTURE, AND STRONG RADIAL OUTFLOW ALOFT. GLOBAL DETERMINISTIC AND ENSEMBLE MODELS ILLUSTRATE GRADUAL TO STEADY DEVELOPMENT OVER THE NEXT 24-36 HOURS AS THE SYSTEM TRANSITS GENERALLY NORTHWARD. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 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 IS MEDIUM. (2) NO OTHER SUSPECT AREAS. 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: NONE. 3. JUSTIFICATION FOR REISSUE: ADDED MEDIUM AREA IN PARA. 1.B.(1).// NNNN
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Updated: 08/26/2026 @ 1:30am  
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