WTPN31 PHNC 312200 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 01C (IONA) WARNING NR 019// RMKS/ 1. TROPICAL STORM 01C (IONA) WARNING NR 019 01 ACTIVE TROPICAL CYCLONES IN CENTPAC 01 ACTIVE TROPICAL CYCLONES IN EASTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 311800Z --- NEAR 13.0N 169.8W MOVEMENT PAST SIX HOURS - 285 DEGREES AT 20 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 - 040 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT REPEAT POSIT: 13.0N 169.8W --- FORECASTS: 12 HRS, VALID AT: 010600Z --- 13.8N 173.4W MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 285 DEG/ 16 KTS --- 24 HRS, VALID AT: 011800Z --- 14.6N 176.6W MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 285 DEG/ 14 KTS --- 36 HRS, VALID AT: 020600Z --- 15.4N 179.4W MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 290 DEG/ 13 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 021800Z --- 16.4N 178.0E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 60 HR POSIT: 295 DEG/ 12 KTS --- 60 HRS, VALID AT: 030600Z --- 17.4N 175.8E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 295 DEG/ 12 KTS --- 72 HRS, VALID AT: 031800Z --- 18.4N 173.4E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 96 HR POSIT: 300 DEG/ 12 KTS --- LONG RANGE OUTLOOK: --- 96 HRS, VALID AT: 041800Z --- 20.8N 169.1E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 120 HR POSIT: 305 DEG/ 11 KTS --- 120 HRS, VALID AT: 051800Z --- 23.4N 165.3E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY POST-TROP/REMNT LOW --- REMARKS: 312200Z POSITION NEAR 13.3N 171.0W. 31JUL25. TROPICAL STORM 01C (IONA), LOCATED APPROXIMATELY 223 NM SOUTH OF JOHNSTON ISLAND, HAS TRACKED WEST-NORTHWESTWARD AT 20 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 311800Z IS 1002 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 311800Z IS 23 FEET. NEXT WARNINGS AT 010400Z, 011000Z, 011600Z AND 012200Z. REFER TO TROPICAL STORM 07E (GIL) WARNINGS (WTPN33 PHNC) FOR SIX-HOURLY UPDATES.// NNNN