WTXS21 PGTW 312100 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE FORMATION ALERT (INVEST 93W) CANCELLATION// REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/302051ZDEC20// AMPN/REF A IS TROPICAL CYCLONE FORMATION ALERT// RMKS/ 1. REMARKS: THIS CANCELS REF A (WTXS21 PGTW 302100). THE AREA OF CONVECTION (INVEST 93S) PREVIOUSLY LOCATED NEAR 13.0S 85.5E IS NOW LOCATED NEAR 13.8S 83.7E, APPROXIMATELY 792 NM EAST-SOUTHEAST OF DIEGO GARCIA. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY AND A 301308Z SSMIS 91GHZ SATELLITE IMAGE DEPICT A MOSTLY EXPOSED LOW LEVEL CIRCULATION LOCATED EAST FROM MAIN AREA OF CONVECTION. INVEST 93S IS IN A MARGINALLY FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH WARM (28-29C) SEA SURFACE TEMPERATURES OFFSET BY HIGH (>25 KTS) VERTICAL WIND SHEAR. GLOBAL MODELS ARE IN GENERAL AGREEMENT THAT INVEST 93S WILL TRACK GENERALLY SOUTHWESTWARD WITH MINIMAL INTENSIFICATION OVER THE NEXT 24 HOURS AND MAY BEGIN TO INTERACT WITH INVEST 96S, POTENTIALLY ABSORBING INVEST 93S. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 0 TO 0 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1021 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS DOWNGRADED TO MEDIUM.// NNNN