WTPN31 PHNC 310400 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 01C (IONA) WARNING NR 016// RMKS/ 1. TROPICAL STORM 01C (IONA) WARNING NR 016 02 ACTIVE TROPICAL CYCLONES IN CENTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 310000Z --- NEAR 11.7N 163.8W MOVEMENT PAST SIX HOURS - 275 DEGREES AT 21 KTS POSITION ACCURATE TO WITHIN 030 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 030 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT REPEAT POSIT: 11.7N 163.8W --- FORECASTS: 12 HRS, VALID AT: 311200Z --- 12.2N 167.7W MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 020 NM SOUTHEAST QUADRANT 020 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 280 DEG/ 18 KTS --- 24 HRS, VALID AT: 010000Z --- 12.8N 171.3W MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 020 NM SOUTHEAST QUADRANT 020 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 280 DEG/ 17 KTS --- 36 HRS, VALID AT: 011200Z --- 13.4N 174.8W MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 020 NM SOUTHEAST QUADRANT 010 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 285 DEG/ 15 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 020000Z --- 14.2N 177.7W MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 020 NM SOUTHEAST QUADRANT 010 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 60 HR POSIT: 285 DEG/ 14 KTS --- 60 HRS, VALID AT: 021200Z --- 15.0N 179.6E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 020 NM SOUTHEAST QUADRANT 010 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 295 DEG/ 12 KTS --- 72 HRS, VALID AT: 030000Z --- 16.0N 177.3E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 020 NM SOUTHEAST QUADRANT 010 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 96 HR POSIT: 295 DEG/ 13 KTS --- LONG RANGE OUTLOOK: --- 96 HRS, VALID AT: 040000Z --- 18.2N 172.6E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 010 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 120 HR POSIT: 300 DEG/ 12 KTS --- 120 HRS, VALID AT: 050000Z --- 20.6N 168.1E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY --- REMARKS: 310400Z POSITION NEAR 11.9N 165.1W. 31JUL25. TROPICAL STORM 01C (IONA), LOCATED APPROXIMATELY 447 NM SOUTHEAST OF JOHNSTON ISLAND, HAS TRACKED WESTWARD AT 21 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 310000Z IS 1000 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 310000Z IS 20 FEET. NEXT WARNINGS AT 311000Z, 311600Z, 312200Z AND 010400Z. REFER TO TROPICAL CYCLONE 02C (KELI) FINAL WARNING (WTPN32 PHNC).// NNNN