WTPN31 PGTW 080300 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL DEPRESSION 04W (MUN) WARNING NR 026// RMKS/ 1. TROPICAL DEPRESSION 04W (MUN) WARNING NR 026 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 080000Z --- NEAR 39.3N 149.1E MOVEMENT PAST SIX HOURS - 025 DEGREES AT 14 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 WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 39.3N 149.1E --- FORECASTS: 12 HRS, VALID AT: 081200Z --- 41.8N 152.3E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 060 DEG/ 15 KTS --- 24 HRS, VALID AT: 090000Z --- 43.3N 155.7E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY POST-TROP/REMNT LOW --- REMARKS: 080300Z POSITION NEAR 39.9N 149.9E. 08JUL25. TROPICAL DEPRESSION 04W (MUN), LOCATED APPROXIMATELY 370 NM EAST OF MISAWA, JAPAN, HAS TRACKED NORTH-NORTHEASTWARD AT 14 KNOTS OVER THE PAST SIX HOURS. ALL DEEP CONVECTION HAS COLLAPSED AS THE COOLER SEA SURFACE CAN NO LONGER SUPPORT A WARM CORE SYSTEM. THE SYSTEM IS ENTERING A TRANSITION PHASE TO A SUBTROPICAL CYCLONE. STRATOCUMULUS FIELDS ARE SHOWING THE EARLY SIGNS OF RELAXING AND EXPANDING AWAY FROM THE EXPOSED LOW LEVEL CIRCULATION CENTER BUT ENOUGH MOMENTUM EXISTS TO SUSTAIN THE SYSTEM ANOTHER 24 HOURS. THE JETSTREAM EXTENDS OVER THE KURILS SO THE SYSTEM HAS TOO FAR TO GO BEFORE IT UNDERGOES THE EXTRA-TROPICAL TRANSITION PROCESS T YPICAL OF WESTPAC. TD MUN IS COOLING FROM BELOW AND WILL LOSE ITS WARM CORE DURING THE NEXT 24 HOURS BEFORE IT GETS TO THE BAROCLINIC ZONE. 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 080000Z IS 1001 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 080000Z IS 12 FEET. REFER TO TROPICAL STORM 05W (DANAS) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.// NNNN