WTPS33 PGTW 121500 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 04P (FOUR) WARNING NR 007// REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/121351ZDEC2020// AMPN/REF A IS A TROPICAL CYCLONE WARNING./ RMKS/ 1. TROPICAL CYCLONE 04P (FOUR) WARNING NR 007 02 ACTIVE TROPICAL CYCLONES IN SOUTHPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 121200Z --- NEAR 15.7S 173.1E MOVEMENT PAST SIX HOURS - 275 DEGREES AT 14 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 WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 15.7S 173.1E --- FORECASTS: 12 HRS, VALID AT: 130000Z --- 15.6S 172.3E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 121500Z POSITION NEAR 15.7S 172.9E. 12DEC20. TROPICAL CYCLONE 04P (FOUR), LOCATED APPROXIMATELY 337 NM WEST-NORTHWEST OF SUVA, FIJI, HAS TRACKED WESTWARD AT 14 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR) SATELLITE IMAGERY DEPICTS DISORGANIZED, FLARING CONVECTION OBSCURING A LOW LEVEL CIRCULATION CENTER (LLCC). THE INITIAL POSITION IS PLACED WITH FAIR CONFIDENCE BASED ON THE POSITION OF THE LLCC IN THE EIR LOOP AS WELL AS VIA EXTRAPOLATION THROUGH CONVECTIVE BANDING FEATURES PRESENT IN A 120957Z AMSU COLOR COMPOSITE IMAGE. THE INITIAL INTENSITY IS ASSESSED AT 35 KTS BASED ON A CIMSS ADVANCED DVORAK TECHNIQUE CURRENT INTENSITY ESTIMATE OF T2.5 (35 KTS) AND THE PRESENCE OF 35 KTS WINDS ALONG THE SOUTHEASTERN PERIPHERY OF THE SYSTEM IN DATA FROM A 120844Z ASCAT-A PASS. THE SYSTEM IS TRACKING ALONG THE NORTHERN PERIPHERY OF A SUBTROPICAL RIDGE POSITIONED TO THE SOUTH AND THROUGH A FAVORABLE ENVIRONMENT WITH LOW (10-15 KTS) VERTICAL WIND SHEAR, WARM (28-29 CELSIUS) SEA SURFACE TEMPERATURES (SST) AND DIVERGENT OUTFLOW ALOFT. DESPITE THESE FAVORABLE CONDITIONS, THE SYSTEM HAS WEAKENED SIGNIFICANTLY OVER THE PAST 12 HOURS AS IT ENTERED THE CAPTURE PHASE OF A DIRECT CYCLONE INTERACTION (DCI) WITH TC 05P WHICH IS LOCATED 115 NM NORTH OF THE SYSTEM CENTER. OVER THE NEXT 12 HOURS TC 04P WILL CONTINUE TO WEAKEN AND DISSIPATE OVER WATER AS IT ENTERS AND COMPLETES THE MERGER PHASE OF THIS DCI AND BECOMES INCORPORATED INTO TC 05P. NUMERICAL MODELS ARE IN FAIR AGREEMENT DURING THIS 12 HOUR FORECAST AND THUS LEND FAIR CONFIDENCE IN THE JTWC FORECAST TRACK WHICH IS PLACED SLIGHTLY EQUATORWARD OF THE JTWC MULTI-MODEL CONSENSUS. 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. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 121200Z IS 14 FEET. REFER TO TROPICAL CYCLONE 05P (FIVE) WARNINGS (WTPS31 PGTW) FOR SIX-HOURLY UPDATES. // NNNN