WTXS32 PGTW 092100 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 27S (ODETTE) WARNING NR 020// RMKS/ 1. TROPICAL CYCLONE 27S (ODETTE) WARNING NR 020 02 ACTIVE TROPICAL CYCLONES IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 091800Z --- NEAR 17.1S 112.2E MOVEMENT PAST SIX HOURS - 140 DEGREES AT 20 KTS POSITION ACCURATE TO WITHIN 025 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT 065 NM SOUTHEAST QUADRANT 135 NM SOUTHWEST QUADRANT 065 NM NORTHWEST QUADRANT REPEAT POSIT: 17.1S 112.2E --- FORECASTS: 12 HRS, VALID AT: 100600Z --- 20.3S 112.3E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT 080 NM SOUTHEAST QUADRANT 130 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 200 DEG/ 12 KTS --- 24 HRS, VALID AT: 101800Z --- 22.5S 111.5E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 092100Z POSITION NEAR 17.9S 112.2E. 09APR21. TROPICAL CYCLONE (TC) 27S (ODETTE), LOCATED APPROXIMATELY 330 NM NORTH-NORTHWEST OF LEARMONTH, AUSTRALIA, HAS TRACKED SOUTHEASTWARD AT 20 KNOTS OVER THE PAST SIX HOURS. TC 27S IS CURRENTLY UNDERGOING FUJIWHARA INTERACTION WITH TC 26S. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY DEPICTS A SHEARED CIRCULATION WITH RAPIDLY WEAKENING CONVECTION OVERHEAD. THE INITIAL POSITION IS BASED ON A 091744Z AMSR2 89GHZ COLOR COMPOSITE MICROWAVE IMAGE SHOWING SHALLOW BANDING WRAPPING TIGHTLY INTO A WELL-DEFINED LOW LEVEL CIRCULATION CENTER WITH WEAK, ISOLATED CONVECTION ON THE WESTERN PERIPHERY. THE INITIAL INTENSITY OF 40 KTS IS BASED ON AN AVERAGE OF PGTW/APRF DVORAK CURRENT INTENSITY ESTIMATES RANGING FROM 2.5 TO 3.0 (35-45 KTS). UPPER-LEVEL ANALYSIS REVEALS A MARGINAL ENVIRONMENT DUE TO THE PROXIMITY TO TC 26S WHICH IS CREATING MODERATE TO HIGH VERTICAL WIND SHEAR (15-25 KTS) AND SUPPRESSING OUTFLOW. TC 27S IS CURRENTLY ROTATING CYCLONICALLY AROUND THE NORTHEAST PERIPHERY OF TC 26S AND IS EXPECTED TO COMPLETE THE FUJIWHARA INTERACTION AS IT BECOMES ABSORBED IN THE EASTERN SEMICIRCLE OF TC 26S WITH DISSIPATION EXPECTED BY TAU 24. NUMERICAL MODEL GUIDANCE IS IN FAIR AGREEMENT WITH THIS COMPLEX SCENARIO AND SUPPORTS THE JTWC FORECAST TRACK WITH MODERATE CONFIDENCE. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 091800Z IS 15 FEET. NEXT WARNINGS AT 100300Z, 100900Z AND 101500Z. REFER TO TROPICAL CYCLONE 26S (SEROJA) WARNINGS (WTXS31 PGTW) FOR SIX-HOURLY UPDATES.// NNNN