．聯合颱風警報中心熱帶天氣報告 (每日 14:00 更新) Abpw10 pgtw 310600 msgid/genadmin/joint typhoon wrncen pearl harbor hi// subj/significant tropical weather advisory for the
western and
south pacific oceans/310600zdec2017-010600zjan2018//
rmks/
1. Western north pacific area (180 to malay peninsula): a. Tropical cyclone summary: none. b. Tropical disturbance summary: (1) an area of convection (invest 99w) previously located near 9.3n 134.7e, is now located near 9.6n 133.7e, approximately 149 nm north-northwest of palau. Animated multispectral satellite imagery and a 310024z 89ghz metop-b microwave image show a slowly consolidating, partially exposed low level circulation center (llcc) to the south and west of flaring convection. A 310025z ascat image depicts 15-20 kt straightline easterly winds around the best track position, with a broad, weak cyclonic circulation and small area of tight troughing located to the south. Upper level analysis indicates that the system is located in an area of low (5-10 knots) vertical wind shear with favorable poleward outflow supporting moderate divergence aloft. The disturbance is located in an area with supportive sea surface temperatures (29-30 degrees celsius). Dynamic models predict the system tracking generally westward, and intensifying in several days while or after crossing the philippines. Maximum sustained surface winds are estimated at 15 to 20 knots. Minimum sea level pressure is estimated to be near 1006 mb. The potential for the development of a significant tropical cyclone within the next 24 hours remains
medium.
(2) no other suspect areas.2. South pacific area (west coast of south america to 135 east): a. Tropical cyclone summary: none. b. Tropical disturbance summary: none.//
