####018002397#### WTPN31 PGTW 181500 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL DEPRESSION 18W (JELAWAT) WARNING NR 007// RMKS/ 1. TROPICAL DEPRESSION 18W (JELAWAT) WARNING NR 007 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 181200Z --- NEAR 7.3N 125.2E MOVEMENT PAST SIX HOURS - 280 DEGREES AT 07 KTS POSITION ACCURATE TO WITHIN 025 NM POSITION BASED ON CENTER LOCATED BY A COMBINATION OF SATELLITE, SYNOPTIC DATA AND EXTRAPOLATION PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND REPEAT POSIT: 7.3N 125.2E --- FORECASTS: 12 HRS, VALID AT: 190000Z --- 7.6N 122.1E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 280 DEG/ 13 KTS --- 24 HRS, VALID AT: 191200Z --- 8.1N 119.6E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 181500Z POSITION NEAR 7.4N 124.4E. 18DEC23. TROPICAL DEPRESSION 18W (JELAWAT), LOCATED APPROXIMATELY 18 NM EAST-NORTHEAST OF DAVAO, PHILIPPINES, HAS TRACKED WESTWARD AT 07 KNOTS OVER THE PAST SIX HOURS. TD 18W CONTINUES TO DECAY RAPIDLY AS THE ASSOCIATED CONVECTIVE ACTIVITY PROGRESSIVELY BECOMES MORE FRAGMENTED AND DISPERSED TO THE NORTH AND SOUTH OF THE ILL-DEFINED LOW LEVEL CIRCULATION. THE INITIAL POSITION IS PLACED WITH LOW CONFIDENCE BASED ON CURRENT TRAJECTORY AND STORM MOTION, SLOWED DOWN TO ACCOUNT FOR FRICTIONAL EFFECTS. THE INITIAL INTENSITY IS HELD AT 25 KNOTS, AT BEST. TD JELAWAT WILL CONTINUE TO TRACK WESTWARD UNDER THE STEERING INFLUENCE OF THE SUBTROPICAL RIDGE TO THE NORTH AND DISSIPATE BY TAU 12, LIKELY SOONER, DUE TO CONTINUED INTERACTION WITH THE RUGGED AND INCREASED VERTICAL WIND SHEAR. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. MINIMUM CENTRAL PRESSURE AT 181200Z IS 1007 MB.// NNNN