WTPN31 PGTW 040900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 21W (PEIPAH) WARNING NR 004// RMKS/ 1. TROPICAL STORM 21W (PEIPAH) WARNING NR 004 UPGRADED FROM TROPICAL DEPRESSION 21W 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 040600Z --- NEAR 31.0N 131.5E MOVEMENT PAST SIX HOURS - 015 DEGREES AT 15 KTS POSITION ACCURATE TO WITHIN 040 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 RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT 090 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT REPEAT POSIT: 31.0N 131.5E --- FORECASTS: 12 HRS, VALID AT: 041800Z --- 33.4N 133.8E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT 100 NM SOUTHEAST QUADRANT 020 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 065 DEG/ 19 KTS --- 24 HRS, VALID AT: 050600Z --- 34.8N 138.0E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 100 NM SOUTHEAST QUADRANT 060 NM SOUTHWEST QUADRANT 020 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 080 DEG/ 19 KTS --- 36 HRS, VALID AT: 051800Z --- 35.3N 142.5E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT 130 NM SOUTHEAST QUADRANT 120 NM SOUTHWEST QUADRANT 060 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 085 DEG/ 20 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 060600Z --- 35.5N 147.5E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT 150 NM SOUTHEAST QUADRANT 140 NM SOUTHWEST QUADRANT 120 NM NORTHWEST QUADRANT --- REMARKS: 040900Z POSITION NEAR 31.6N 132.1E. 04SEP25. TROPICAL STORM 21W (PEIPAH), LOCATED APPROXIMATELY 486 NM WEST-SOUTHWEST OF YOKOSUKA, JAPAN, HAS TRACKED NORTH- NORTHEASTWARD AT 15 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 040600Z IS 996 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 040600Z IS 18 FEET. NEXT WARNINGS AT 041500Z, 042100Z, 050300Z AND 050900Z.// NNNN