WTPS31 PGTW 201500 AMD MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 31P (THIRTYONE) WARNING NR 010A AMENDED// RMKS/ 1. TROPICAL CYCLONE 31P (THIRTYONE) WARNING NR 010A AMENDED 01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 201200Z --- NEAR 12.6S 140.2E MOVEMENT PAST SIX HOURS - 270 DEGREES AT 07 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY A COMBINATION OF SATELLITE AND RADAR PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY REPEAT POSIT: 12.6S 140.2E --- FORECASTS: 12 HRS, VALID AT: 210000Z --- 12.4S 138.6E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 000 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 290 DEG/ 09 KTS --- 24 HRS, VALID AT: 211200Z --- 11.8S 136.8E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 000 NM NORTHEAST QUADRANT 055 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 295 DEG/ 08 KTS --- 36 HRS, VALID AT: 220000Z --- 11.1S 135.3E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 000 NM NORTHEAST QUADRANT 055 NM SOUTHEAST QUADRANT 035 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 300 DEG/ 08 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 221200Z --- 10.3S 133.8E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 000 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 300 DEG/ 06 KTS --- 72 HRS, VALID AT: 231200Z --- 9.0S 131.6E 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 - 000 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 96 HR POSIT: 330 DEG/ 05 KTS --- LONG RANGE OUTLOOK: --- 96 HRS, VALID AT: 241200Z --- 7.4S 130.6E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 201500Z POSITION NEAR 12.5S 139.8E. 20APR25. TROPICAL CYCLONE 31P (THIRTYONE), LOCATED APPROXIMATELY 545 NM EAST OF DARWIN, AUSTRALIA, HAS TRACKED WESTWARD AT 07 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 201200Z IS 1002 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 201200Z IS 10 FEET. NEXT WARNINGS AT 202100Z, 210300Z, 210900Z AND 211500Z. 2. JUSTIFICATION FOR AMENDMENT: UPDATED INITIAL POSITION BASED ON A LATE RECEIPT OF SCATTEROMETER DATA.// NNNN