周子堯@FB

短短不到24小時颱風，JMA於18/08Z判定減弱為熱帶低壓~

熱帯低気圧
平成30年11月18日15時45分 発表
<18日15時の実況>
大きさ        -
強さ        -
        熱帯低気圧
存在地域        ベトナム
中心位置        北緯 11度00分(11.0度)
        東経 109度00分(109.0度)
進行方向、速さ        西北西 20km/h(10kt)
中心気圧        1008hPa

P.S原先打熱(   )低壓，"帶"字因電腦輸入法而自動省略，抱歉~

jrchang5

JMA於11180645Z已降格為TD，TS生命週期不到24小時。

熱帯低気圧
平成30年11月18日15時45分 発表

<18日15時の実況>
大きさ        -
強さ        -
熱帯低気圧
存在地域        ベトナム
中心位置        北緯 11度00分(11.0度)
東経 109度00分(109.0度)
進行方向、速さ        西北西 20km/h(10kt)
中心気圧        1008hPa

jrchang5

越過中南半島進入泰國灣後，JTWC又重新評級為Medium。未來將越過泰國南部進入印度洋。有部分模式支持其可能在24至30小時後短暫重新發展。

AN AREA OF CONVECTION HAS PERSISTED (INVEST 32W) NEAR 8.4N
102.4E, APPROXIMATELY 435 NM NORTH OF SINGAPORE. ANIMATED
MULTISPECTRAL SATELLITE IMAGERY AND A 191514Z SSMI 85GHZ IMAGE
DEPICT A REEMERGENCE OF DISTURBANCE OF 32W(TORJI) OVER THE GULF OF
THAILAND. IMAGERY SHOWS A PARTIALLY EXPOSED AND CONSOLIDATING LOW
LEVEL CIRCULATION CENTER (LLCC) WITH PERSISTENT DEEP CONVECTION. A
PARTIAL 191506Z ASCAT METOP-B PASS REVEALS A SEMI-SYMMETRIC
CIRCULATION WITH AN AREA OF 15-20 KNOT WINDS IN THE NORTHERN
PERIPHERY. 32W IS LOCATED IN FAVORABLE ENVIRONMENT WITH LOW (05-10
KNOT) VERTICAL WIND SHEAR, SUPPORTIVE OUTFLOW AND WARM SEA SURFACE
TEMPERATURES (28-30 CELSIUS). GLOBAL MODELS INDICATE THE
POSSIBILITY OF A SHORT LIVED CYCLONE WITH A SOUTHWEST TRAJECTORY
OVER THE NEXT 24-30 HOURS. MODELS ARE SPLIT ON WHETHER THE
DEVELOPMENT WILL OCCUR IN THE GULF OF THAILAND OR OVER THE SOUTHERN
PORTION OF THE BAY OF BENGAL. MAXIMUM SUSTAINED SURFACE WINDS ARE
ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED
TO BE NEAR 1010 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS MEDIUM.

周子堯@FB

JTWC 09Z重新發報，預計12小時內風速能增強至30kt

TPPN11 PGTW 200921

A. TROPICAL DEPRESSION 32W (TORAJI)

B. 20/0900Z

C. 8.16N

D. 101.89E

E. FIVE/HMWRI8

F. T1.5/1.5  STT: S0.0/03HRS

G. IR/EIR/VIS/MSI

H. REMARKS: 40A/PBO SBC/ANMTN. CNVCTN WRAPS .30 ON LOG10 SPIRAL
YIELDING A DT OF 1.5. MET/PT AGREE. DBO DT.

I. ADDITIONAL POSITIONS: NONE


   MARTIN

jrchang5

已迅速通過泰國南部進入印度洋，JTWC已於11202100Z發出Final Warning。

WTPN33 PGTW 202100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL DEPRESSION 32W (TORAJI) WARNING NR 007   
   03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   201800Z --- NEAR 7.0N 99.4E
     MOVEMENT PAST SIX HOURS - 240 DEGREES AT 20 KTS
     POSITION ACCURATE TO WITHIN 025 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
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   REPEAT POSIT: 7.0N 99.4E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   210600Z --- 6.1N 97.8E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 24 HR POSIT: 230 DEG/ 08 KTS
    ---
   24 HRS, VALID AT:
   211800Z --- 5.1N 96.6E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
202100Z POSITION NEAR 6.8N 99.0E.
TROPICAL DEPRESSION (TD) 32W (TORAJI), LOCATED APPROXIMATELY 74 NM
SOUTHEAST OF PHUKHET, THAILAND, HAS TRACKED WEST-
SOUTHWESTWARD AT 20 KNOTS OVER THE PAST SIX HOURS.
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 201800Z
IS 7 FEET. REFER TO TROPICAL DEPRESSION 33W (THIRTYTHREE) WARNINGS
(WTPN32 PGTW) FOR SIX-HOURLY UPDATES. REFER TO TROPICAL STORM 34W
(MAN-YI) WARNINGS (WTPN31 PGTW) FOR SIX-HOURLY UPDATES.//
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