WTIO21 PGTW 010130 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE FORMATION ALERT (INVEST 90B) CANCELLATION// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/310251ZJAN2023// AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.// RMKS/ 1. REMARKS: THIS CANCELS REF A (WTIO21 PGWT 310300). THE AREA OF CONVECTION (INVEST 90B) PREVIOUSLY LOCATED NEAR 8.5N 84.5E IS NOW LOCATED NEAR 8.2N 83.3E, APPROXIMATELY 218.8 NM EAST-NORTHEAST OF COLOMBO, SRI LANKA. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY AND A 312208Z SSMIS 91GHZ MICROWAVE IMAGE SHOWS FLARING DEEP CONVECTION BEING SHEARED TO THE NORTHWEST AND DISORGANIZED LOW LEVEL CLOUD LINES. ENVIRONMENTAL ANALYSIS REVEALS MARGINALLY UNFAVORABLE CONDITIONS FOR INTENSIFICATION AS INDICATED BY MODERATE (20-25KT) VERTICAL WIND SHEAR, INCREASING LAND INTERACTION WITH SRI LANKA PARTIALLY OFFSET BY WARM (28-29C) SST AND POLEWARD OUTFLOW. GLOBAL MODELS ARE IN AGREEMENT THAT 90B WILL CONTINUE WEST-SOUTHWESTWARD AND MAKE LANDFALL OVER SRI LANKA NEAR TAU 24 AFTER WHICH THE SYSTEM IS FORECAST TO DISSIPATE. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1005 MB. IN VIEW OF THE UNFAVORABLE FORECAST FOR THIS SYSTEM, THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS DOWNGRADED TO MEDIUM.// NNNN