WTPN31 PGTW 260900 MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE WARNING// REF/A/NAVPACMETOCCEN PEARL HARBOR HI/252121Z AUG 04// AMPN/TROPICAL CYCLONE FORMATION ALERT// RMKS/ 1. TROPICAL DEPRESSION 21W WARNING NR 001 03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 260600Z4 --- NEAR 13.3N7 152.4E2 MOVEMENT PAST SIX HOURS - 285 DEGREES AT 04 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT REPEAT POSIT: 13.3N7 152.4E2 --- FORECASTS: 12 HRS, VALID AT: 261800Z7 --- 13.5N9 151.7E4 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT VECTOR TO 24 HR POSIT: 275 DEG/ 06 KTS --- 24 HRS, VALID AT: 270600Z5 --- 13.6N0 150.5E1 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT VECTOR TO 36 HR POSIT: 275 DEG/ 07 KTS --- 36 HRS, VALID AT: 271800Z8 --- 13.7N1 149.1E5 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT VECTOR TO 48 HR POSIT: 280 DEG/ 10 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 280600Z6 --- 14.0N5 147.1E3 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 280 DEG/ 10 KTS --- 72 HRS, VALID AT: 290600Z7 --- 14.8N3 143.1E9 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 060 NM NORTHWEST QUADRANT --- REMARKS: 260900Z7 POSITION NEAR 13.3N7 152.2E0. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 260600Z IS 10 FEET. TROPICAL DEPRESSION (TD) 21W, LOCATED APPROXIMATELY 435 NM EAST OF ANDERSEN AFB, GUAM, HAS TRACKED WEST-NORTHWESTWARD AT 04 KNOTS OVER THE PAST 06 HOURS. THE WARNING POSITION IS BASED ON 260530Z6 MULTISPECTRAL SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 25 AND 30 KNOTS. RECENT ANIMATED MULTISPECTRAL SATELLITE IMAGERY SHOWS WELL DEFINED LOW LEVEL CLOUD LINES CONVERGING IN ON A LOW LEVEL CIRCULATION CENTER (LLCC) AND DEEP CONVECTION HAS RECENTLY CONSOLIDATED OVER THE LLCC. THIS WARNING SUPERSEDES AND CANCELS REF A, NAVPACMETOCCEN 252121Z3 AUG 04 TROPICAL CYCLONE FORMATION ALERT (WTPN24 PGTW 252130 ) NEXT WARNINGS AT 261500Z4, 262100Z1, 270300Z2 AND 270900Z8. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 260600Z4 IS 10 FEET. REFER TO WWPW30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. REFER TO SUPER TYPHOON 19W (CHABA) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES. REFER TO TROPICAL STORM 20W (AERE) WARNINGS (WTPN33 PGTW) FOR SIX-HOURLY UPDATES.//