Name of System 系統名稱 |
TD 11W 熱帶低氣壓 11W |

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Bulletin Number 發佈編號 |
#1 |
Time of Report 報告時間 |
2007/09/07, 17:20 HKT (09:20 UTC) |
Time of Observation 觀測時間 |
2007/09/07, 14 HKT (06 UTC) |
Position 位置 |
26.3 N, 157.0 E |
1-min. Average Wind Speed 1分鐘平均風速 |
30 knots 節 (Gusts 陣風: 40 knots 節) |
10-min. Average Wind Speed 10分鐘平均風速 |
30 knots 節 (Gusts 陣風: 45 knots 節) |
Pressure (JMA) 氣壓 (日本氣象廳) |
1004 hPa |
Movement 移向和移速 |
315 deg 度 (NW 西北), 7 knots 節 |
Area(s) that will be affected 受影響地區 |
N/A |
Forecast Track 預測路徑圖 |
 |
Overview 總覽 |
11W intensified to a tropical depression at 06 UTC, moving in a WNW direction in the past 24 hours. As of 06 UTC, 11W was centred 1950 km (1060 NM) ESE of Tokyo, Japan.
11W 於 06 UTC 增強為一熱帶低氣壓,大致向西北偏西移動。在 06 UTC,11W集結在東京東南偏東約 1950 公里 (1060 海里)。
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Movement Analysis 路徑分析 |
Subject to the northern extension of a subtropical ridge anchored E of 11W, it moved WNW in the past 24 hours. As 11W advances to the west, it will be positioned SW of the ridge that makes it travel in a NW direction, after which it can follow a recurvature pattern as it will be situated at the western side of the retreating subtropical ridge.
11W現時位於副熱帶高壓脊北端延伸之南部,於過去24小時向西北偏西移動。預料當11W繼續西移,它將會位處於該脊之西南部,從而向西北移動。稍後因副熱帶高壓脊繼續東退,11W將會從該脊的西端北上,跟隨一般的"轉向型"路徑。 |
Intensity Analysis 強度分析 |
As of 06 UTC, 11W's convection wrapped 0.35 on the log10 spiral which yields a T-number of 2.0 or equivalently 30 knots wind (tropical depression). Sea surface temperatures (SSTs) are at about 27 degrees at where 11W is located, and therefore it can intensify a bit at less than climatological rate. Since it is formed a bit north, it will soon enter areas with lower SSTs that will lead to the weaking of the system. In the current forecast, 11W will not be able to attain typhoon intensity at all.
在 06 UTC,11W的T號碼為2.0,即 30 節的風速 (熱帶低氣壓)。預料11W可在約27度的海水中稍為增強至強烈熱帶風暴,但由於11W形成位置偏北,海水溫度將隨11W的緯度增加而下降,11W亦會在達到颱風強度前減弱。 |
Effects on Hong Kong 對香港的影響 |
No threat to Hong Kong is expected within the next 72 hours.
11W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 |
21 HKT, 2007/09/08 (or earlier 或更早) |
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