WTXS21 PGTW 251830 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE FORMATION ALERT (INVEST 97S) CANCELLATION// REF/A/MSG JOINT TYPHOON WRNCEN PEARL HARBOR HI/242051ZDEC2021// AMPN/REF IS A TROPICAL CYCLONE FORMATION ALERT.// RMKS/ 1. REMARKS: THIS CANCELS REF A (WTXS21 PGTW 242100). THE AREA OF CONVECTION (INVEST 97S) PREVIOUSLY LOCATED NEAR 11.5S 130.5E IS NOW LOCATED NEAR 12.9S 130.4E, APPROXIMATELY 37 NM SOUTHWEST OF DARWIN, AUSTRALIA. ANIMATED ENHANCED INFRARED (EIR) SATELLITE IMAGERY DEPICTS A BROAD AREA OF SOMEWHAT ORGANIZED CONVECTION ROTATING AROUND AN ASSESSED LOW LEVEL CIRCULATION CENTER (LLCC). RADAR ANALYSIS INDICATES THAT INVEST 97S HAS MADE LANDFALL ALONG THE WESTERN SHORE OF THE TOP END REGION OF AUSTRALIA. ALBEIT OVER LAND, JTWC HAS DOWNGRADED THE INVEST TO A LOW. GLOBAL MODELS AGREE THAT THE VORTEX WILL TRACK TO THE EAST-SOUTHEAST WITH THE SLIGHT POSSIBILITY OF RE-INTENSIFICATION OVER THE GULF OF CARPENTARIA IN APPROXIMATELY 48-72 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 25 TO 30 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 998 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS DOWNGRADED TO LOW. // NNNN