WTPN31 PGTW 160900 1. TROPICAL DEPRESSION 20W WARNING NR 004 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 160600Z3 --- NEAR 15.0N6 114.4E0 MOVEMENT PAST SIX HOURS - 025 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: 15.0N6 114.4E0 --- FORECASTS: 12 HRS, VALID AT: 161800Z6 --- 15.7N3 114.8E4 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT VECTOR TO 24 HR POSIT: 360 DEG/ 03 KTS --- 24 HRS, VALID AT: 170600Z4 --- 16.2N9 114.9E5 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT VECTOR TO 36 HR POSIT: 360 DEG/ 04 KTS --- 36 HRS, VALID AT: 171800Z7 --- 17.1N9 114.8E4 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT VECTOR TO 48 HR POSIT: 340 DEG/ 04 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 180600Z5 --- 17.8N6 114.5E1 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT VECTOR TO 72 HR POSIT: 335 DEG/ 04 KTS --- 72 HRS, VALID AT: 190600Z6 --- 19.3N3 113.7E2 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 160900Z6 POSITION NEAR 15.2N8 114.5E1. TROPICAL DEPRESSION (TD) 20W, LOCATED APPROXIMATELY 440 NM SOUTH OF HONG KONG, CHINA, HAS TRACKED NORTH-NORTHEASTWARD AT 04 KNOTS OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 160530Z5 MULTISPECTRAL SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 25 KNOTS. A 160226Z7 SPECIAL SENSOR MICROWAVE IMAGER (SSMI) PASS AND ANIMATED VISIBLE SATELLITE IMAGERY REVEALS A FULLY EXPOSED LOW LEVEL CIRCULATION CENTER (LLCC) WITH CONVECTION DISPLACED TO THE SOUTH- SOUTHWEST OF THE LLCC. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 160600Z3 IS 18 FEET. REFER TO WWPW30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 161500Z3, 162100Z0, 170300Z1 AND 170900Z7. REFER TO SUPER TYPHOON 19W (PHANFONE) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.// NNNN