WPAC: INVEST 97W

[Hayabusa]

97W INVEST 240728 0000 16.0N 129.0E WPAC 15 0

[Hayabusa]

ABPW10 PGTW 270700
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH
PACIFIC OCEANS REISSUED/270700Z-280600ZJUL2024//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
A. TROPICAL CYCLONE SUMMARY: NONE.
B. TROPICAL DISTURBANCE SUMMARY:
(1) AN AREA OF CONVECTION (INVEST 97W) HAS PERSISTED NEAR 17.4N
128.1E, APPROXIMATELY 478 NM SOUTH-SOUTHEAST OF ISHIGAKI-JIMA.
ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) DEPICTS A WAVE EMBEDDED
IN THE EASTERLIES, WITH WEAK LOW-LEVEL CYCLONIC TURNING EVIDENT AND
FLARING DEEP CONVECTION OVER THE EASTERN PERIPHERY. A 280042Z MHS 89
GHZ MICROWAVE IMAGE DEPICTS CURVED SHALLOW BANDING OVER THE NORTHERN
SEMICIRCLE WITH A LINE OF FRAGMENTED DEEP CONVECTION ALONG THE EASTERN
FLANK ASSOCIATED WITH LOW-LEVEL CONVERGENT FLOW. A 280140Z ASCAT-C
IMAGE REVEALS A SHARP WAVE FEATURE WITH 5-15 KNOT CORE WINDS AND A
SWATH OF 15-20 KNOT EASTERLIES DISPLACED ABOUT 60-70 NM TO THE NORTH.
THERE IS CURRENTLY NO EVIDENCE OF A CLOSED CIRCULATION IN ASCAT
IMAGERY AND MSI. UPPER-LEVEL ANALYSIS INDICATES A MARGINAL ENVIRONMENT
WITH BROAD DIFFLUENT FLOW AND LOW TO MODERATE (15 TO 20 KNOTS)
VERTICAL WIND SHEAR. GLOBAL MODELS INDICATE WEAK DEVELOPMENT DUE TO
PERSISTENT STRONG EAST-SOUTHEASTERLY TO SOUTHEASTERLY UPPER-LEVEL FLOW
AS THE DISTURBANCE TRACKS NORTHWESTWARD. MAXIMUM SUSTAINED SURFACE
WINDS ARE ESTIMATED AT 12 TO 17 KNOTS. MINIMUM SEA LEVEL PRESSURE IS
ESTIMATED TO BE NEAR 1008 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS LOW.
(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 LOW AREA IN PARAGRAPH 1.B.(1).//
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