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ABPW10 PGTW 312230
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS REISSUED/312230ZJUL2013-010600ZAUG2013//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/311951ZJUL2013//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
B. TROPICAL DISTURBANCE SUMMARY:
(1) THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 13.1N
126.1E IS NOW LOCATED NEAR 17.5N 125.5E, APPROXIMATELY 315 NM
NORTHEAST OF MANILA, PHILIPPINES. ANIMATED INFRARED SATELLITE
IMAGERY DEPICTS A LARGE AREA OF PERSISTENT DEEP CONVECTION LOCATED
OVER THE NORTHERN PERIPHERY OF A DEVELOPING LOW-LEVEL CIRCULATION
CENTER (LLCC). A 311851Z SSMI IMAGE DEPICTS A CURVED BAND OF INTENSE
CONVECTION OVER THE NORTHERN SEMI-CIRCLE AND WEAK, FRAGMENTED
BANDING OVER THE SOUTHERN SEMI-CIRCLE OF A POORLY DEFINED LLCC.
RECENT SCATTEROMETER IMAGERY INDICATED ONLY SHARP TROUGHING;
HOWEVER, DEEP CONVECTION APPEARS TO BE CONSOLIDATING OVER THE PAST
12 HOURS AND A WEAK SURFACE CIRCULATION MAY BE FORMING SOUTH OF THE
DEEP CONVECTION. UPPER-LEVEL CONDITIONS ARE MARGINAL WITH MODERATE
VERTICAL WIND SHEAR OFFSET BY GOOD POLEWARD OUTFLOW INTO A TUTT CELL
OVER TAIWAN. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO
20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1005
MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL
CYCLONE WITHIN THE NEXT 24 HOURS IS
UPGRADED TO MEDIUM.