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90W JMA:TD 遠洋高緯擾動 JTWC判定為副熱帶低壓

簽到天數: 1194 天

[LV.10]以壇為家III

2020-7-28 07:19 | 顯示全部樓層
  熱帶低壓副熱帶低壓  
編號:90 W
名稱:

  基本資料  
升格熱低日期:2020 07 28 02
擾動編號日期:2020 07 28 07
撤編日期  :2020 07 30 12
登陸地點  :

  巔峰時期資料  
近中心最強風速
日本氣象廳 (JMA) :15 m/s ( 30 kt )
美國海軍研究實驗室 (NRL):25 kts ( Sub-DB )
海平面最低氣壓1010 百帕

  過去路徑圖  


  擾動編號資料  
  JMA  
TROPICAL DEPRESSION 1010 HPA AT 25N 163E WEST 15 KT.

20072803.png
  NRL  
90W.INVEST.15kts.1010mb.25.0N.162.0E
075855qu7fgrj7utptwy1r.jpg

以上資料來自:JMA、NRL、颱風論壇整理製作

評分

參與人數 1水氣能量 +15 2020擾動搶樓 +1 收起 理由
king111807 + 15 + 1 熱帶擾動首帖

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簽到天數: 601 天

[LV.9]以壇為家II

霧峰追風者|2020-7-28 07:59 | 顯示全部樓層
20200727.2310.himawari-8.vis.90W.INVEST.15kts.1010mb.25N.162E.100pc.jpg 075048u0xfgxqs4s7sn4r0.jpg

評分

參與人數 1水氣能量 +15 收起 理由
king111807 + 15

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簽到天數: 2473 天

[LV.Master]伴壇終老

甜心|2020-7-28 14:06 來自手機 | 顯示全部樓層
一般大都是擾動熱低壓跟颱風高緯轉變成溫帶氣旋,

溫帶氣旋高緯轉變為擾動熱低壓到是滿少見的,

大概是長時間處在太平洋高亞的熱環帶上,因為長時間在高海溫的環境場導致變質了。

點評

不過環境實在太乾,沒啥發展機會  發表於 2020-7-28 14:17
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簽到天數: 601 天

[LV.9]以壇為家II

霧峰追風者|2020-7-28 15:03 | 顯示全部樓層
(1) AN AREA OF CONVECTION (INVEST 90W) HAS PERSISTED NEAR
24.5N 160.4E, APPROXIMATELY 467 NM NORTHWEST OF WAKE ISLAND. THE
SYSTEM IS CURRENTLY CLASSIFIED AS A SUBTROPICAL SYSTEM, GENERALLY
CHARACTERIZED AS HAVING BOTH TROPICAL AND MIDLATITUDE CYCLONE
FEATURES. RECENT ANIMATED MULTISPECTRAL SATELLITE IMAGERY AND A
280250Z AMSR2 89 GHZ MICROWAVE IMAGE DEPICT A BROAD OVERALL
STRUCTURE WITH DISORGANIZED CONVECTION AND TWO DISTINCT SMALL
CIRCULATIONS ROTATING ABOUT A CENTROID. ADDITIONALLY, WEAK SHALLOW
BANDING IS PRESENT AND WRAPPING AROUND THE BROAD CENTER. A 272330Z
ASCAT-B IMAGE INDICATES AN ASYMMETRIC WIND FIELD WITH 20-25KT WINDS
AROUND THE NORTHERN SEMICIRCLE WITH A LARGE RADIUS OF MAXIMUM WINDS
(>100NM). UPPER LEVEL ANALYSIS INDICATES A MARGINAL ENVIRONMENT WITH
CYCLONIC EASTERLY FLOW AND MODERATE TO STRONG VERTICAL WIND SHEAR
(20-30KTS). HOWEVER, THE SYSTEM IS CURRENTLY LOCATED OVER WARM (28-
30C) SEA SURFACE TEMPERATURES. MODEL ANALYSIS INDICATES THE SYSTEM
IS LOCATED UNDER THE NORTHERN PERIPHERY OF A 500MB LOW. THE SYSTEM
IS EXPECTED TO RECURVE POLEWARD IN THE NEXT 36-48 HOURS WHILE
BECOMING ABSORBED IN AN APPROACHING FRONTAL SYSTEM. MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1006 MB. FOR HAZARDS AND
WARNINGS, REFERENCE THE FLEET WEATHER CENTER SAN DIEGO HIGH WINDS
AND SEAS PRODUCT OR REFER TO LOCAL WMO DESIGNATED FORECAST
AUTHORITY. THE POTENTIAL FOR THE SYSTEM TO TRANSITION INTO A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS LOW.
abpwsair.jpg


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[LV.10]以壇為家III

老農民版夜神月|2020-7-28 15:05 | 顯示全部樓層
JTWC28/0600Z評級Low
ABPW10 PGTW 280600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS/280600Z-290600ZJUL2020//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY:
      (1) AN AREA OF CONVECTION (INVEST 90W) HAS PERSISTED NEAR
24.5N 160.4E, APPROXIMATELY 467 NM NORTHWEST OF WAKE ISLAND. THE
SYSTEM IS CURRENTLY CLASSIFIED AS A SUBTROPICAL SYSTEM, GENERALLY
CHARACTERIZED AS HAVING BOTH TROPICAL AND MIDLATITUDE CYCLONE
FEATURES. RECENT ANIMATED MULTISPECTRAL SATELLITE IMAGERY AND A
280250Z ASMR2 89 GHZ MICROWAVE IMAGE DEPICT A BROAD OVERALL
STRUCTURE WITH DISORGANIZED CONVECTION AND TWO DISTINCT SMALL
CIRCULATIONS ROTATING ABOUT A CENTROID. ADDITIONALLY, WEAK SHALLOW
BANDING IS PRESENT AND WRAPPING AROUND THE BROAD CENTER. A 272330Z
ASCAT-B IMAGE INDICATES AN ASYMMETRIC WIND FIELD WITH 20-25KT WINDS
AROUND THE NORTHERN SEMICIRCLE WITH A LARGE RADIUS OF MAXIMUM WINDS
(>100NM). UPPER LEVEL ANALYSIS INDICATES A MARGINAL ENVIRONMENT WITH
CYCLONIC EASTERLY FLOW AND MODERATE TO STRONG VERTICAL WIND SHEAR
(20-30KTS). HOWEVER, THE SYSTEM IS CURRENTLY LOCATED OVER WARM (28-
30C) SEA SURFACE TEMPERATURES. MODEL ANALYSIS INDICATES THE SYSTEM
IS LOCATED UNDER THE NORTHERN PERIPHERY OF A 500MB LOW. THE SYSTEM
IS EXPECTED TO RECURVE POLEWARD IN THE NEXT 36-48 HOURS WHILE
BECOMING ABSORBED IN AN APPROACHING FRONTAL SYSTEM. MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1006 MB. FOR HAZARDS AND
WARNINGS, REFERENCE THE FLEET WEATHER CENTER SAN DIEGO HIGH WINDS
AND SEAS PRODUCT OR REFER TO LOCAL WMO DESIGNATED FORECAST
AUTHORITY. THE POTENTIAL FOR THE SYSTEM TO TRANSITION INTO A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS LOW.

abpwsair.jpg 20200728.0630.himawari-8.vis.90W.INVEST.25kts.1006mb.24.5N.160.4E.100pc.jpg
LATEST.jpg 20200728.0555.f18.composite.90W.INVEST.25kts.1006mb.24.5N.160.4E.095pc.jpg
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簽到天數: 1130 天

[LV.10]以壇為家III

老農民版夜神月|2020-7-30 11:42 | 顯示全部樓層
JMA00Z撤TD,認定已併入鋒面
20073009.png
JTWC亦30/0300Z撤評
1) THE AREA OF CONVECTION (INVEST 90W) PREVIOUSLY LOCATED
NEAR 26.8N 158.2E HAS DISSIPATED AND IS NO LONGER SUSPECT FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE IN THE NEXT 24 HOURS.

abpwsair (11).jpg 20200730.0110.hm8.x.ir1km_bw.90WINVEST.30kts-1006mb-280N-1577E.100pc.jpg


20200730.0110.himawari8.x.wv1km.90WINVEST.30kts-1006mb-280N-1577E.100pc.jpg


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