Current Tropical Cyclone Information 最新熱帶氣旋資訊

+20W (FAXAI 法茜) Bulletin 發佈 #2 (2007/10/27, 16:00 HKT)

Name of System 系統名稱	STS FAXAI 強烈熱帶風暴法茜
Bulletin Number 發佈編號	#2
Time of Report 報告時間	2007/10/27, 16:00 HKT (08:00 UTC)
Time of Observation 觀測時間	2007/10/27, 14 HKT (06 UTC)
Position 位置	33.4 N, 139.6 E
1-min. Average Wind Speed 1分鐘平均風速	60 knots 節 (Gusts 陣風: 85 knots 節)
10-min. Average Wind Speed 10分鐘平均風速	55 knots 節 (Gusts 陣風: 80 knots 節)
Pressure 氣壓	980 hPa
Past 6-hr Movement 過去6小時移向和移速	NE 東北 at 59 knots 節
Area(s) that are affected 受影響地區	Southeastern Japan 日本東南部

Forecast Track 預測路徑圖

Overview 總覽

Other images 其他圖像

JTWC Track 聯合颱風警報中心路徑圖

JMA Track 日本氣象廳路徑圖

FAXAI further intensified as it travels northeast with an ever-increasing speed. At 14 HKT, FAXAI was centred 260 km (140 NM) S of Tokyo.

法茜昨天加速向東北移動，並逐漸增強。在 14 HKT，法茜集結在東京之南約 260 公里 (140 海里)。

Movement Analysis 路徑分析

FAXAI will move NE along the northwestern periphery of the steering subtropical ridge. Coupled with the steering effect of the westerlies, FAXAI will move at a very high speed (in excess of 60 knots) in the remainder of the forecast period.

預料受西風帶及副熱帶高壓脊的共同影響，法茜將於餘下時間沿副熱帶高壓脊西北邊向東北快速 (超過 60 節) 移動。

Intensity Analysis 強度分析

Current T-number: XT3.5/3.5/D1.0/24 HRS
FAXAI starts to transit into an extratropical cyclone. It can be seen that the northern cloud band has already fused with the front and the convection starts to displace from the low-level circulation towards the NE. FAXAI should slightly weaken when extratropical transition is completed. It is also worth mentioning that due to FAXAI's high speed, wind speed distribution near the storm may be highly asymmetrical.

現時的 T 號碼: XT3.5/3.5/D1.0/24 HRS
法茜正開始轉化為溫帶氣旋，其北部雲帶經已跟鋒面結合，而環流也被切往低層中心的東北面。預料法茜將在轉化完成前減弱少許。值得一提的是由於法茜移動得非常快，它週邊的風力分布將可能變得非常不平均。

Effects on Hong Kong 對香港的影響

No threat to Hong Kong is expected within the next 72 hours.

法茜於未來的72小時將不會對香港構成任何影響。

Next Update 下次更新

19 HKT, 2007/10/28 (or earlier 或更早)

Probabilities of TC Signals from HKO 香港天文台(已)發出熱帶氣旋警告信號的機率

Not Applicable 不適用

+20W (FAXAI 法茜) Bulletin 發佈 #1 (2007/10/26, 15:30 HKT)

Name of System 系統名稱	TS FAXAI 熱帶風暴法茜
Bulletin Number 發佈編號	#1
Time of Report 報告時間	2007/10/26, 15:30 HKT (07:30 UTC)
Time of Observation 觀測時間	2007/10/26, 14 HKT (06 UTC)
Position 位置	24.1 N, 132.0 E
1-min. Average Wind Speed 1分鐘平均風速	40 knots 節 (Gusts 陣風: 55 knots 節)
10-min. Average Wind Speed 10分鐘平均風速	35 knots 節 (Gusts 陣風: 50 knots 節)
Pressure 氣壓	996 hPa
Movement 移向和移速	N 北 at 12 knots 節
Area(s) that are affected 受影響地區	N/A

Forecast Track 預測路徑圖

Overview 總覽

Other images 其他圖像

JTWC Track 聯合颱風警報中心路徑圖

JMA Track 日本氣象廳路徑圖

A low pressure area southeast of the Ryukyu Islands intensified into a tropical storm today, and was named FAXAI. At 14 HKT, FAXAI was centred 490 km (270 NM) ESE of Okinawa.

在琉球群島東南面的一個低壓區今天增強為一熱帶風暴，並被命名為法茜。在 14 HKT，法茜集結在沖繩島之東南偏東約 490 公里 (270 海里)。

Movement Analysis 路徑分析

FAXAI is now traversing the weakness between the subtropical ridge and the high pressure cell anchored at eastern China. It is forecast that FAXAI will turn to the northeast soon due to the effect of the westerlies. It will then travel along the northwestern periphery of the subtropical ridge.

法茜正通過在副熱帶高壓脊和中國東部的高壓之間的的弱點。預料受西風帶的影響，法茜將加速轉向東北，沿副熱帶高壓脊西北邊移動。

Intensity Analysis 強度分析

Current T-number: T2.5/2.5/INT OBS
FAXAI will soon enter regions with very high vertical wind shear (higher than 50 knots). Coupled with the effect of decreasing sea temperatures as FAXAI advances northward, FAXAI should remain as a tropical storm before extratropical transition.

Current T-number: T2.5/2.5/INT OBS
法茜將進入強垂直風切變地域 (50 節以上) 。加上受較冷的海水影響，預料法茜將在轉化為溫帶氣旋前維持熱帶風暴強度。