SUBJ: TROPICAL CYCLONE WARNING WTPN32 PGTW 290900 1. TROPICAL STORM 21W (MARIA) WARNING NR 006 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 290600Z7 --- NEAR 18.5N4 115.8E5 MOVEMENT PAST SIX HOURS - 150 DEGREES AT 07 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT REPEAT POSIT: 18.5N4 115.8E5 --- FORECASTS: 12 HRS, VALID AT: 291800Z0 --- 18.9N8 116.7E5 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 035 KT WINDS - 040 NM SOUTHEAST SEMICIRCLE 030 NM ELSEWHERE VECTOR TO 24 HR POSIT: 030 DEG/ 05 KTS --- 24 HRS, VALID AT: 300600Z9 --- 19.7N7 117.2E1 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 035 KT WINDS - 045 NM EAST SEMICIRCLE 035 NM ELSEWHERE VECTOR TO 36 HR POSIT: 010 DEG/ 10 KTS --- 36 HRS, VALID AT: 301800Z2 --- 21.7N0 117.5E4 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 035 KT WINDS - 045 NM EAST SEMICIRCLE 035 NM ELSEWHERE VECTOR TO 48 HR POSIT: 005 DEG/ 10 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 310600Z0 --- 23.6N1 117.7E6 MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT RADIUS OF 035 KT WINDS - 060 NM EAST SEMICIRCLE OVER WATER 050 NM ELSEWHERE OVER WATER VECTOR TO 72 HR POSIT: 005 DEG/ 10 KTS --- 72 HRS, VALID AT: 010600Z7 --- 27.7N6 118.3E3 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 290900Z0 POSITION NEAR 18.6N5 116.0E8. TROPICAL STORM (TS) 21W (MARIA), LOCATED APPROXIMATELY 240 NM SOUTH-SOUTHEAST OF HONG KONG, HAS TRACKED SOUTH-SOUTHEASTWARD AT 07 KNOTS OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 290530Z9 VISIBLE SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 35 KNOTS. ANIMATED VISIBLE SATELLITE IMAGERY DEPICTS AN INCREASE IN AREAL COVERAGE DURING THE PAST 6 HOURS. THE 200 MB ANALYSIS INDICATES IMPROVED DIFFLUENCE OVER THE REGION COMPARED TO THE EARLIER (281200Z3) ANAL. TS 21W IS FORECAST TO MOVE EASTWARD OVER THE NEXT 24 HOURS AS TS 20W (PRAPIROON) CONTINUES TO INFLUENCE THE LOW/MID-LEVEL STEERING FLOW. THEN, AS TS 20W MOVES FURTHER NORTHWARD, THE MID LEVEL RIDGE TO THE NORTHEAST WILL BUILD AND STEER TS 21W INCREASINGLY NORTHWARD. TS 21W IS FORECAST TO INTENSIFY DURING THE NEXT 48 HOURS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 290600Z7 IS 12 FEET. REFER TO WWPW30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 291500Z7 (DTG 291352Z2), 292100Z4 (DTG 291952Z8), 300300Z6 (DTG 300152Z1) AND 300900Z2 (DTG 300752Z7). REFER TO TROPICAL STORM 20W (PRAPIROON) WARNINGS (WTPN31 PGTW) FOR SIX-HOURLY UPDATES.// NNNN