WTXS21 PGTW 091000
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT (INVEST 99S) CANCELLATION//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/082121ZDEC2020//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT//
RMKS/
1. REMARKS: THIS CANCELS REF A (WTXS21 PGTW 082130). THE AREA OF
CONVECTION (INVEST 99S), PREVIOUSLY LOCATED NEAR 17.9S 120.8E, IS
NOW LOCATED NEAR 20.0S 122.7E, APPROXIMATELY 949 NM EAST-NORTHEAST
OF LEARMONTH, AUSTRALIA. THE SYSTEM IS NOW TRACKING OVER LAND AFTER
HAVING MADE LANDFALL SOUTHWEST OF BROOME, AUSTRALIA. ANIMATED
MULTISPECTRAL SATELLITE IMAGERY (MSI) DEPICTS WEAK, LOW LEVEL
CONVECTIVE BANDS WRAPPING INTO A PARTIALLY EXPOSED LOW LEVEL
CIRCULATION CENTER (LLCC). THE SYSTEM AS DISSIPATED DUE TO INCREASED
VERTICAL WIND SHEAR IN THE AREA AND DUE TO INTERACTION WITH THE
UNDERLYING TERRAIN. NUMERICAL MODELS ARE IN GOOD AGREEMENT THAT
INVEST 99S WILL CONTINUE TO TRACK INLAND. MAXIMUM SUSTAINED SURFACE
WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL PRESSURE IS
ESTIMATED TO BE NEAR 1004 MB. THERE NO LONGER REMAINS THE POTENTIAL
FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE
NEXT 24 HOURS DUE TO THE SYSTEM DISSIPATION.//
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