(1) AN AREA OF CONVECTION (INVEST 93W) HAS PERSISTED NEAR 5.3N
129.4E, APPROXIMATELY 250 NM EAST-SOUTHEAST OF DAVAO, PHILIPPINES.
ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS A BROAD DISTURBANCE
WITH DISORGANIZED, FLARING CONVECTION ALONG THE SOUTHERN FLANK OF
THE SYSTEM ASSOCIATED WITH A WESTERLY WIND BURST. A 022338Z ASCAT-A
IMAGE REVEALS AN ELONGATED, DEFINED CIRCULATION WITH CONVERGENT 15
TO 20 KNOT WESTERLY WINDS OVER THE SOUTHERN SEMICIRCLE AND NORTHWEST
OF THE CENTER. A 030053Z MHS 89GHZ COMPOSITE IMAGE INDICATES SHALLOW
CONVECTIVE BANDING OVER THE SOUTHERN SEMICIRCLE WRAPPING INTO THE
EAST QUADRANT OF A BROAD LLCC, HOWEVER, CONVECTIVE STRUCTURE IS WEAK
ELSEWHERE. UPPER-LEVEL ANALYSIS INDICATES A MARGINAL ENVIRONMENT
WITH MODERATE TO STRONG (20 TO 25 KNOTS) NORTHERLY VERTICAL WIND
SHEAR AND BROAD, DIFFLUENT FLOW. SEA SURFACE TEMPERATURES ARE WARM
(30-31C), AND ARE CONDUCIVE FOR DEVELOPMENT. MAXIMUM SUSTAINED
SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL
PRESSURE IS ESTIMATED TO BE NEAR 1004 MB. THE POTENTIAL FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS IS MEDIUM.
ABPW10 PGTW 040600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS/040600Z-050600ZAUG2020//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/040151ZAUG2020//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
A. TROPICAL CYCLONE SUMMARY:
(1) AT 04AUG20 0000Z, TROPICAL STORM 03W (HAGUPIT) WAS LOCATED
NEAR 28.8N 120.5E, APPROXIMATELY 153 NM SOUTH-SOUTHWEST OF SHANGHAI,
CHINA, AND HAD TRACKED NORTH- NORTHWESTWARD AT 11 KNOTS OVER THE
PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 45
KNOTS GUSTING TO 55 KNOTS. SEE REF A (WTPN31 PGTW 040300) FOR
FURTHER DETAILS.
(2) NO OTHER TROPICAL CYCLONES.
B. TROPICAL DISTURBANCE SUMMARY:
(1) THE AREA OF CONVECTION (INVEST 93W) PREVIOUSLY LOCATED
NEAR 5.3N 129.4E HAS DISSIPATED AND IS NO LONGER SUSPECT FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE IN THE NEXT 24 HOURS.
(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.//
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