WTXS31 PGTW 262100 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 20S (BIANCA) WARNING NR 008// RMKS/ 1. TROPICAL CYCLONE 20S (BIANCA) WARNING NR 008 03 ACTIVE TROPICAL CYCLONES IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 261800Z --- NEAR 26.6S 104.2E MOVEMENT PAST SIX HOURS - 125 DEGREES AT 05 KTS POSITION ACCURATE TO WITHIN 030 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: 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 - 045 NM NORTHEAST QUADRANT 100 NM SOUTHEAST QUADRANT 065 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT REPEAT POSIT: 26.6S 104.2E --- FORECASTS: 12 HRS, VALID AT: 270600Z --- 26.3S 103.1E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 262100Z POSITION NEAR 26.5S 103.9E. 26FEB25. TROPICAL CYCLONE 20S (BIANCA), LOCATED APPROXIMATELY 599 NM WEST-SOUTHWEST OF LEARMONTH, AUSTRALIA, HAS TRACKED SOUTHEASTWARD AT 05 KNOTS OVER THE PAST SIX HOURS. THE CURRENT POSITION IS SET WITH HIGH CONFIDENCE ON A FULLY EXPOSED LOW-LEVEL CIRCULATION EVIDENT IN ENHANCED INFRARED IMAGERY AND A 261455Z METOP- B ASCAT PASS, WHICH ALSO SUPPORTS THE INTENSITY ESTIMATE OF 35 KNOTS. TC 20S IS RAPIDLY WEAKENING AND UNRAVELING UNDER THE DUAL INFLUENCES OF VERY STRONG NORTHWESTERLY VERTICAL WIND SHEAR AND PASSAGE OVER COOL WATER. 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. MINIMUM CENTRAL PRESSURE AT 261800Z IS 1005 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 261800Z IS 15 FEET. REFER TO TROPICAL CYCLONE 22S (GARANCE) WARNINGS (WTXS32 PGTW) FOR TWELVE-HOURLY UPDATES. REFER TO TROPICAL CYCLONE 23S (HONDE) WARNINGS (WTXS33 PGTW) FOR TWELVE-HOURLY UPDATES.// NNNN