WTXS32 PGTW 100900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 27S (ODETTE) WARNING NR 022// RMKS/ 1. TROPICAL CYCLONE 27S (ODETTE) WARNING NR 022 02 ACTIVE TROPICAL CYCLONES IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 100600Z --- NEAR 21.3S 113.0E MOVEMENT PAST SIX HOURS - 175 DEGREES AT 24 KTS POSITION ACCURATE TO WITHIN 040 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 21.3S 113.0E --- FORECASTS: 12 HRS, VALID AT: 101800Z --- 25.1S 111.4E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 100900Z POSITION NEAR 22.3S 112.6E. 10APR21. TROPICAL CYCLONE 27S (ODETTE), LOCATED APPROXIMATELY 86 NM NORTHWEST OF LEARMONTH, AUSTRALIA, HAS TRACKED SOUTHWARD AT 24 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) INDICATES TC ODETTE CONTINUES TO SPIRAL INWARDS TOWARDS TC 26S AS PART OF FUJIWHARA INTERACTION. THE SYSTEM HAS RAPIDLY WEAKENED, THOUGH THERE HAS BEEN A FLARE UP IN DEEP CONVECTION NEAR THE CENTER IN THE PAST FEW HOURS, LIKELY A RESULT OF CONVERGENCE FLOW WITH THE OUTER BANDS OF TC 26S. THE INITIAL POSITION IS PLACED WITH MODERATE CONFIDENCE BASED ON A MANUAL TRACK OF THE LOW LEVEL VORTEX THROUGH THE ANIMATED VISIBLE IMAGERY. THE OVERALL SYSTEM INTENSITY HAS BEEN LOWERED TO 30 KNOTS BASED ON A PGTW DVORAK INTENSITY ESTIMATE OF T2.0 (30 KTS). AUTOMATED CIMSS ADT ESTIMATES ARE MUCH HIGHER BUT ARE CONSIDERED UNREALISTIC DUE TO FIXING ON THE TRANSIENT CONVECTIVE ACTIVITY. AN EARLIER 100012Z ASCAT-A PASS REVEALED A VERY SMALL AREA OF GALE FORCE WINDS IN THE EASTERN HEMISPHERE, BUT THESE ARE NOT CONSIDERED REPRESENTATIVE OF THE OVERALL INTENSITY, THOUGH NEAR-GALE FORCE WINDS COULD POTENTIALLY STILL BE PRESENT ON THE EASTERN SIDE OF THE CIRCULATION. ENVIRONMENTAL CONDITIONS ARE INCREASINGLY HOSTILE, WITH AN ESTIMATED 15-20 KNOTS OF EASTERLY VERTICAL WIND SHEAR (VWS) AND A CONSTRAINED OUTFLOW REGIME WHICH IS INHIBITING THE SYSTEM. TC 27S WILL CONTINUE TO TRACK TOWARDS THE SOUTHWEST, SPIRALING CLOSER TO TC 26S WHILE FULLY DISSIPATING AS A DISTINCT CIRCULATION WITHIN THE NEXT 12 HOURS. DYNAMIC MODEL GUIDANCE IS IN OVERALL GOOD AGREEMENT ON THE MERGER AND DISSIPATION SCENARIO, LENDING HIGH CONFIDENCE TO THE JTWC FORECAST TRACK. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 100600Z IS 13 FEET. REFER TO TROPICAL CYCLONE 26S (SEROJA) WARNINGS (WTXS31 PGTW) FOR SIX-HOURLY UPDATES.// NNNN