周子堯@FB

  熱帶低壓   
編號：14 F ( 08 P )
名稱：無

  基本資料     
擾動編號日期：2017 年 02 月 21 日 05 時
JTWC升格日期:2017 年 02 月 22 日 11 時
撤編日期　　：2017 年 02 月 23 日 08 時
登陸地點　　：暫無

  巔峰時期資料  
近中心最強風速 /海平面最低氣壓
澳洲氣象局 (BoM) :  -- kt
聯合颱風警報中心(JTWC): 40 kt ( TS )
海平面最低氣壓    ：995 百帕
94P.INVEST.15kts.NAmb.15.4S.176.5W

TROPICAL DEPRESSION TD14F CENTRE [1001HPA] ANALYSED NEAR 15.7S
178.4E AT 202100UTC.
POSITION POOR BASED ON HIMAWARI-8 1R/EIR IMAGERY AND PERIPHERAL
SURFACE OBSERVATION. TD14F MOVING SOUTHEAST AT ABOUT 08 KNOTS.

ORGANISATION POOR WITH CONVECTION PERSISTENT TO THE NORTH OF LLCC.
SYSTEM LIES JUST NORTH OF AN UPPER RIDGE IN A LOW TO MODERATE SHEARED
ENVIRONMENT. CYCLONIC CIRCULATION EXTENDS UPTO 700HPA. SST IS AROUND
30 DEGREES CELSIUS.

GLOBAL MODELS HAVE PICKED UP THE SYSTEM AND SLOWLY MOVE IT
SOUTHEASTWARDS WITH SLIGHT INTENSIFICATION.

POTENTIAL FOR THIS SYSTEM TO DEVELOP INTO A TROPICAL CYCLONE IN THE
NEXT 24 TO 48 HOURS IS LOW.

以上資料來自：BoM、JTWC、颱風論壇整理製作

s6815711

JTWC 02Z評級提升至Medium

(1) AN AREA OF CONVECTION (INVEST 94P) HAS PERSISTED NEAR
16.7S 179.2E, APPROXIMATELY 110 NM EAST-NORTHEAST OF NADI, FIJI.
ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS A CONSOLIDATING LOW-
LEVEL CIRCULATION CENTER (LLCC) WITH FRAGMENTED CONVECTIVE BANDING.
A 202132Z METOP-A 89GHZ IMAGE SHOWS FORMATIVE BANDING OVER THE
NORTHERN SEMI-CIRCLE WITH SHALLOW BANDING ELSEWHERE. SURFACE
OBSERVATIONS AT UNDU POINT (91652) SHOW SUSTAINED NORTHWESTERLY
WINDS OF 21 KNOTS WITH A SLP VALUE OF 1002.7MB. ENVIRONMENTAL
CONDITIONS ARE CONDUCIVE FOR FURTHER DEVELOPMENT WITH GOOD
DIFFLUENCE ALOFT, LOW VERTICAL WIND SHEAR AND WARM SST. THE GLOBAL  
MODELS INDICATE THAT THE SYSTEM WILL STRENGTHEN AS IT TRACKS EAST-
SOUTHEASTWARD, AWAY FROM FIJI. MAXIMUM SUSTAINED SURFACE WINDS ARE
ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED
TO BE NEAR 1002 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS MEDIUM.

s6815711

JTWC 0330Z升格編號08P 巔峰上望40

s6815711

不到一天 發佈FW