WPAC: INVEST 90W

[Subtrop]

WP, 90, 2025091606, , BEST, 0, 150N, 1375E, 15, 0, DB, 0, , 0, 0, 0, 0, 0, 0, 0, 0, 0, W, 0, , 0, 0, INVEST, ,

[Hayabusa]

Now low

ABPW10 PGTW 161000
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH
PACIFIC OCEANS REISSUED/161000Z-170600ZSEP2025//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/160751ZSEP2025//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
A. TROPICAL CYCLONE SUMMARY:
(1) AT 16SEP25 0600Z, TROPICAL DEPRESSION 23W (TWENTYTHREE) WAS
LOCATED NEAR 15.5N 123.5E, APPROXIMATELY 155 NM EAST-NORTHEAST OF
MANILA, PHILIPPINES, AND HAD TRACKED NORTHWESTWARD AT 13 KNOTS OVER THE
PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 25
KNOTS GUSTING TO 35 KNOTS. SEE REF A (WTPN31 PGTW 160900) FOR FURTHER
DETAILS.
(2) NO OTHER TROPICAL CYCLONES.
B. TROPICAL DISTURBANCE SUMMARY:
(1) THE AREA OF CONVECTION (INVEST 99W) PREVIOUSLY LOCATED NEAR
13.7N 125.2E IS NOW THE SUBJECT OF A TROPICAL CYCLONE WARNING. SEE PARA.
1.A.(1) FOR FURTHER DETAILS.
(2) AN AREA OF CONVECTION (INVEST 90W) HAS PERSISTED NEAR 15.0N
137.5E, APPROXIMATELY 333 NM NORTH OF YAP. ANIMATED MULTISPECTRAL
SATELLITE IMAGERY DEPICTS A COMPACTING DEVELOPING SYSTEM WITH TROUGHING
AND BROAD TURNING. ENVIRONMENTAL ANALYSIS REVEALS FAVORABLE CONDITIONS
WITH LOW VERTICAL WIND SHEAR, IMPROVED EQUATORWARD OUTFLOW, AND WARM SEA
SURFACE TEMPERATURES. GLOBAL MODELS INDICATE CIRCULATION DEVELOPMENT AND
INCREASING WIND SPEEDS OVER THE NEXT 24-48 HOURS. MAXIMUM SUSTAINED
SURFACE WINDS ARE ESTIMATED AT 13 TO 18 KNOTS. MINIMUM SEA LEVEL
PRESSURE IS ESTIMATED TO BE NEAR 1009 MB. THE POTENTIAL FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS
IS LOW.
(3) 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: UPGRADED AREA IN PARA 1.B.(1) TO WARNING
STATUS AND ADDED LOW AREA IN PARA. 1.B.(2).//
NNNN