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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