WTPN31 PGTW 070900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TYPHOON 12W (YAGI) WARNING NR 024// RMKS/ 1. TYPHOON 12W (YAGI) WARNING NR 024 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 070600Z --- NEAR 21.0N 106.9E MOVEMENT PAST SIX HOURS - 300 DEGREES AT 14 KTS POSITION ACCURATE TO WITHIN 030 NM POSITION BASED ON CENTER LOCATED BY A COMBINATION OF SATELLITE, RADAR AND SYNOPTIC DATA PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 110 KT, GUSTS 135 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND RADIUS OF 064 KT WINDS - 045 NM NORTHEAST QUADRANT 045 NM SOUTHEAST QUADRANT 045 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT RADIUS OF 050 KT WINDS - 085 NM NORTHEAST QUADRANT 080 NM SOUTHEAST QUADRANT 085 NM SOUTHWEST QUADRANT 075 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 150 NM NORTHEAST QUADRANT 145 NM SOUTHEAST QUADRANT 155 NM SOUTHWEST QUADRANT 135 NM NORTHWEST QUADRANT REPEAT POSIT: 21.0N 106.9E --- FORECASTS: 12 HRS, VALID AT: 071800Z --- 21.4N 105.3E MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND RADIUS OF 064 KT WINDS - 030 NM NORTHEAST QUADRANT 030 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT RADIUS OF 050 KT WINDS - 050 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT 070 NM SOUTHEAST QUADRANT 060 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 285 DEG/ 07 KTS --- 24 HRS, VALID AT: 080600Z --- 21.8N 103.9E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT 060 NM SOUTHEAST QUADRANT 070 NM SOUTHWEST QUADRANT 070 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 285 DEG/ 07 KTS --- 36 HRS, VALID AT: 081800Z --- 22.1N 102.5E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 48 HR POSIT: 275 DEG/ 04 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 090600Z --- 22.2N 101.6E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 070900Z POSITION NEAR 21.1N 106.5E. 07SEP24. TYPHOON 12W (YAGI), LOCATED APPROXIMATELY 56 NM EAST OF HANOI, VIETNAM, HAS TRACKED WEST-NORTHWESTWARD AT 14 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED IMAGERY DEPICTS WARMING CLOUD TOPS AND A FILLING CLOUDED EYE FEATURE AS THE SYSTEM TRACKS INTO THE FLAT AND HUMID BAC SON VALLEY OF THE HAIPHONG PROVINCE, WHICH MAY CAUSE GRADUAL WEAKENING BEFORE TRACKING OVER INTO THE MOUNTAINOUS REGION OF THE XUAN SON NATIONAL PARK. THE TERRAIN INTERACTION WILL ULTIMATELY LEAD TO DISSIPATION BY THE END OF THE FORECAST AT TAU 48. 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 070600Z IS 942 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 070600Z IS 40 FEET. REFER TO TROPICAL STORM 13W (LEEPI) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES. // NNNN