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TC Watch / 熱帶氣旋 > Selected TC Review / 重要熱帶氣旋回顧 > 201611W (DIANMU 電母) [Refresh 更新]

201611W (DIANMU 電母) - Profile 檔案

(Issued on October 11, 2016)
(於 2016 年 10 月 11 日發出)

Brief profile of DIANMU | 電母小檔案:

JTWC number 聯合颱風警報中心 (JTWC) 號碼 11W
International number 國際編號 1608
Period of existence 生存時期 (JTWC) 2016/08/18 08 HKT - 2016/08/20 02 HKT
Lifetime 壽命 (JTWC) 1.75 days 日
Maximum 1-minute wind (JTWC) JTWC 一分鐘平均最高中心風速 40 knots 節 (Tropical Storm 熱帶風暴)
Minimum pressure (JTWC) JTWC 最低氣壓 988 hPa 百帕
Highest TC signal by HKO (if applicable)
香港天文台發出最高熱帶氣旋警告信號
3 (Strong Wind Signal 強風信號)
Closest point of approach by HKO (if applicable)
香港天文台所示之最接近距離 (如適用)
SW 200 km (real-time warning 實時報告) / SW 220 km (TC report 熱帶氣旋報告)
Time of closest approach by HKO (if applicable)
香港天文台所示之最接近時間 (如適用)
2016/08/17 11 HKT (real-time warning and TC report 實時報告及熱帶氣旋報告)
Lowest pressure recorded at HKO (if applicable)
香港天文台錄得的最低氣壓 (如適用)
991.5 hPa 百帕 (2016/08/17 16:59 HKT)

TC signals for Hong Kong & Track 香港曾經生效的熱帶氣旋警告和路徑圖:

Table 表:

Signal
信號
Date and time
日期和時間
Distance from HK
與香港的距離
Predicted movement
預測移動方向和速度
Max. 10-min winds
中心最高十分鐘平均風速
2016/08/17 (WED) 11:30 HKT SW 200 km W Slowly 45 km/h (25 knots, TD)
2016/08/17 (WED) 22:15 HKT SW 240 km W Slowly 55 km/h (30 knots, TD)
2016/08/18 (THU) 11:15 HKT WSW 310 km W at 15 km/h 65 km/h (35 knots, TS)
2016/08/18 (THU) 13:15 HKT WSW 350 km W at 18 km/h 65 km/h (35 knots, TS)

Figure 圖:

(Track figure courtesy of Lorenzo. Data from HKO. 鳴謝 Lorenzo 提供路徑圖,資料取自天文台)

TC Track

Percentile Ranks 百分等級:

Percentile rank among storms with #3 Signal (at compilation of this review)*:
發出三號信號之風暴中的百分等級 (編寫此回顧之時)*:

*This measures the relative wind strength in Hong Kong caused by this storm compared with others that share the same signal. 指標顯示此風暴相對於其他發出同樣信號的風暴為香港帶來之風力強度

For more information, please refer to Wind Speed Data for TCs that Have Affected Hong Kong. 更多資訊載於 影響香港氣旋之風速數據

  Overall:
總計:
14
  Weak
Component Ranks 分部等級
  Reference stations:
參考站:
12
  Weak
  Victoria Harbour:
維多利亞港:
23
  Moderately weak
中等偏弱
  Urban:
市區:
17
  Weak
  Offshore & high ground
離岸和高地:
5
  Weak

Cyclones that attained similar rating (with signal #3): PENNY (1998), LUKE (1994)
相近級別之熱帶氣旋 (三號信號):彭妮 (1998), 路加 (1994)

IR imagery animation 紅外線雲圖動畫:

TC track from HKWW 本站的熱帶氣旋路徑圖:

TC Track

TC track from HKO 天文台的熱帶氣旋路徑圖:

TC Track

Past HKWW Bulletins 本站發佈

Please click here for bulletins on this tropical cyclone. 請按這裡

Storm Development Overview 風暴發展概覽

Unless otherwise stated, all times below are in Hong Kong Standard Time (UTC+8)
除非特別註明,下文時間均為香港標準時間 (協調世界時加 8 小時)

A broad area of monsoon depression persisted in northern South China Sea in mid-August. It transformed into a tropical depression in the morning of August 17, at around 200 km southwest of Hong Kong. At that time, a high pressure cell was established in central China, and was strengthening gradually. Under its influence, the tropical depression was expected to move west slowly in the general direction of Leizhou Peninsula.

The JTWC issued a tropical cyclone formation alert for the system that night, while the JMA issued a gale warning. Both agencies upgraded the system at 8 am August 18; giving it the storm number 11W and the name DIANMU respectively. DIANMU's more intense convections are concentrated in the south to southwestern peripheries. It moved west-southwest and crossed Leizhou Peninsula that afternoon, picking up speed in the process as the high pressure in China intensifies.

DIANMU entered the Gulf of Tonkin that night and the larger body of warm water there allowed the storm to intensify. Its convections tightened and the Chinese authorities upgraded it into a severe tropical storm on August 19, while the other official agencies maintained their tropical storm assessment. DIANMU made landfall in northern Vietnam in the afternoon of August 19 and weakened gradually, degenerating into an area of low pressure on August 20.

一個廣闊季風低壓於 8 月中旬在南海北部徘徊。8 月 17 日,該低壓於香港西南方約 200 公里處轉為熱帶低氣壓。當時,中國中部有一高壓區,並逐漸增強。受其影響,該熱帶低氣壓預料會向偏西緩慢移動,靠近雷州半島。

聯合颱風警報中心當晚對該系統發出熱帶氣旋形成警報,而日本氣象廳則發出烈風警告。兩台均於 18 日上午 8 時作出升格,分別給予風暴編號 11W 及命名為電母。電母較強的對流集中在其南及西南面;它向西南偏西移動,於下午橫過雷州半島,並因於中國的高壓增強而加速移動。

電母於 18 日晚進入北部灣。由於該區有大片較暖海域,風暴逐漸增強。它的對流變得較為緊密,中國方面將其升格為強烈熱帶風暴,但其他官方氣象台則維持熱帶風暴的評級。電母於 19 日下午登陸越南北部,隨後逐漸減弱,於 20 日減弱為低壓區。

Weather in Hong Kong During Approach 風暴影響時香港天氣狀況

Link to relevant HKO weather report bulletins: 17/8 18/8
香港天文台相關天氣報告連結17/8 18/8

The weather in Hong Kong has been unstable prior to DIANMU's formation as the monsoon depression had already been lingering around northern South China Sea for several days. The HKO issued the #1 Standby Signal at 11:30 am on August 17, the same time as the upgrade into a tropical depression. Winds were generally moderate in the territory at that time, coming in from the east. The HKO expected local winds to strengthen overnight and issued the #3 Strong Wind Signal at 10:15 pm the same day. As the storm moved west, local winds veered to the southeast early on August 18, together with an increase in wind speed. The strongest winds were generally observed in the early morning, with strong winds recorded at some stations.

DIANMU's track speed increased on August 18 and the storm was moving away from the territory. The HKO issued the #1 Standby Signal at 11:15 am when the storm was around 310 km from Hong Kong. This signal was cancelled just two hours later, at 1:15 pm. It should be mentioned that many places saw another surge in wind speed near 3 pm as a rainband swept across the territory, although they did not reach strong force except for a few stations.

The weather in Hong Kong remained unstable in the following few days and improved on August 22.

由於電母前身的季風低壓盤據南海北部達數天之久,香港的天氣於電母形成之前已經較為不穩定。香港天文台於 8 月 17 日上午 11 時 30 分將該系統升格為熱帶低氣壓之時發出一號戒備信號,當時本港吹東風,風勢和緩。由於天文台預計當晚深夜風勢會有所加強,它於同日晚上 11 時 15 分改發三號強風信號。隨著風暴西移,本港風向於 18 日早段順轉至東南,風速開始上升;早上風勢最為強勁,部分地區吹強風。

電母於 18 日加速西移,與香港的距離逐漸增加。天文台於上午 11 時 15 分改發一號戒備信號,當時電母距離香港約 310 公里。一號信號只維持了兩小時,於下午 1 時 15 分取消。值得留意的是一道雨帶於 3 時左右橫過香港,多數地區風勢曾再度增強,但只有少數氣象站再度錄得強風。

電母遠去後,本港天氣仍然不穩定,至 22 日才見好轉。

Image Gallery 圖片庫

Figure 1 - The monsoon depression lingering around northern South China Sea on August 15 (left) and its tropical cyclone transition on August 17 (right)
圖 1 - 8 月 15 日於南海北部徘徊的季風低壓 (左) 及其於 8 月 17 日之熱帶氣旋轉化 (右)

Figure 2 - Calculated wind field distribution chart at 8 am August 17
圖 2 - 8 月 17 日上午 8 時之估算風場分布圖

Figure 3 - Radar image showing DIANMU at its formation, at around 220 km southwest of Hong Kong
圖 3 - 雷達圖顯示電母初形成時的情況,當時風暴於香港西南約 220 公里處

Figure 4 - Wind field analysis at 9:26 pm August 17
圖 4 - 8 月 17 日下午 9 時 26 分之風場分析圖

Figures 5 - HKO's forecast track and estimated wind radii for DIANMU on August 18
圖 5 - 8 月 18 日香港天文台對電母的預測路徑及風圈估計圖

Figure 6 - Steering flow chart at 8 am August 18
圖 6 - 8 月 18 日上午 8 時之駛流場圖

Figure 7 - Local wind distribution at 7:10 am August 18
圖 7 - 8 月 18 日上午 7 時 10 分之本地風勢分布圖

Figure 8 - Wind speed time series at Cheung Chau (top) and Waglan Island (bottom) on August 17-18
圖 8 - 長洲 (上) 及橫瀾島 (下) 於 8 月 17 至 18 日的風速時間序列圖

Winds Recorded at Reference Stations 參考站所錄得的風速

Station
風速站
Max. 10-min avg. wind speed
最高十分鐘平均風速
Beaufort classification
蒲福氏風級分類
Chek Lap Kok 赤鱲角 40 km/h Fresh 清勁
Cheung Chau 長洲 55 km/h STRONG 強風
Kai Tak 啟德 38 km/h Fresh 清勁
Lau Fau Shan 流浮山 34 km/h Fresh 清勁
Sai Kung 西貢 43 km/h STRONG 強風
Sha Tin 沙田 30 km/h Moderate 和緩
Ta Kwu Ling 打鼓嶺 22 km/h Moderate 和緩
Tsing Yi (SHL) 青衣蜆殼油庫 25 km/h Moderate 和緩

Number of stations recording at least STRONG force (force 6 - 7) winds: 2
Number of stations recording at least GALE force (force 8 - 9) winds: 0
Number of stations recording at least STORM force (force 10 - 11) winds: 0
Number of stations recording HURRICANE force (force 12) winds: 0

錄得 強風 (6 - 7 級) 或更高風速的站數: 2
錄得 烈風 (8 - 9 級) 或更高風速的站數: 0
錄得 暴風 (10 - 11 級) 或更高風速的站數: 0
錄得 颶風 (12 級) 風速的站數: 0

Charts and Figures 各項數據

Table 1: Track data from HKWW:
表一 : 香港天氣觀測站之路徑資料

YYMMDDZZ Lat Long Wind
16081700 210N1130E 025
16081706 210N1127E 030
16081712 208N1127E 035
16081718 208N1125E 035
16081800 209N1119E 040
16081806 209N1106E 040
16081812 205N1096E 045
16081818 205N1086E 045
16081900 205N1076E 050
16081906 207N1067E 050
16081912 208N1053E 040
16081918 211N1036E 030

Table 2: Maximum gust and hourly average wind speed recorded in Hong Kong from HKO:
表二 : 香港天文台公佈的各站最高每小時平均風力和陣風數據 (英文)

Station
Maximum Gust
Maximum Hourly Mean Wind
Direction
Speed (km/h)
Date/Month
Time
Direction
Speed (km/h)
Date/Month
Time
Bluff Head (Stanley)
SSE
62
18/8
02:26
SSE
38
18/8
04:00
Central Pier
SE
52
18/8
02:45
E
30
17/8
12:00
Cheung Chau
SE
79
18/8
03:56
SE
49
18/8
04:00
Cheung Chau Beach
E
56
17/8
23:35
E
38
17/8
23:00
Green Island
SSE
70
18/8
02:54
NE
40
17/8
12:00
Hong Kong International Airport
SE
54
18/8
04:01
SSE
27
18/8
05:00
Kai Tak
ESE
62
18/8
07:03
ESE
30
18/8
04:00
King's Park 
SE
49
18/8
06:58
ESE
19
18/8
07:00
Lau Fau Shan
ENE
47
17/8
12:41
ENE
27
17/8
13:00
ENE
47
17/8
12:58
Ngong Ping
SW
96
18/8
09:25
E
63
17/8
23:00
North Point
ENE
41
17/8
12:16
E
30
17/8
12:00
ESE
41
18/8
02:55
Peng Chau
E
51
18/8
02:47
E
27
17/8
12:00
SE
51
18/8
04:09
ESE
51
18/8
07:07
Ping Chau
SE
31
18/8
02:59
E
6
17/8
12:00
SE
6
18/8
11:00
Sai Kung 
SSE
62
18/8
02:31
SSE
30
18/8
08:00
Sha Chau
SE
51
18/8
03:33
SE
34
18/8
04:00
Sha Lo Wan
E
75
18/8
04:16
E
25
18/8
07:00
Sha Tin
SSE
54
18/8
02:56
SE
16
18/8
05:00
Shek Kong
ENE
49
17/8
18:51
E
22
17/8
19:00
Star Ferry (Kowloon)
E
54
18/8
01:59
E
31
18/8
07:00
Ta Kwu Ling 
E
43
18/8
02:49
ENE
14
18/8
03:00
Tai Mei Tuk
SE
62
18/8
02:44
E
36
17/8
13:00
Tai Mo Shan
SE
104
18/8
03:45
SE
68
18/8
04:00
Tai Po Kau
ESE
52
18/8
02:41
ESE
30
18/8
03:00
Tap Mun
SE
65
18/8
02:52
SE
30
18/8
06:00
Tate's Cairn 
S
76
18/8
03:03
S
38
18/8
04:00
S
76
18/8
08:19
Tseung Kwan O
E
63
18/8
02:31
E
13
18/8
02:00
Tsing Yi Shell Oil Depot
ESE
43
18/8
02:57
E
20
18/8
08:00
Tuen Mun Government Offices
SE
51
18/8
03:51
SE
23
18/8
04:00
Waglan Island
SE
81
18/8
02:27
SE
56
18/8
03:00
Wetland Park
ENE
38
17/8
12:34
ENE
16
17/8
13:00
Wong Chuk Hang
SE
52
18/8
06:42
E
22
18/8
04:00

Table 3: Rainfall (in millimetres) contributed by DIANMU from HKO (figures in brackets are based on incomplete hourly data):
表三 : 香港天文台公佈的各站雨量資料 (英文) (方括號內之數據由不完整之每小時資料擷取)

Station
17 Aug
18 Aug
Total Rainfall (mm)
Hong Kong Observatory (HKO)
40.9
50.9
91.8
Hong Kong International Airport (HKA)
26.8
34.0
60.8
Cheung Chau (CCH)
35.5
20.0
55.5
H23 Aberdeen
37.5
30.5
68.0
N05 Fanling
15.0
46.5
61.5
N13 High Island
31.5
27.5
59.0
K04 Jordan Valley
50.0
64.5
114.5
N06 Kwai Chung
32.5
58.5
91.0
H12 Mid Levels
40.5
49.0
89.5
N09 Sha Tin
44.0
65.0
109.0
H19 Shau Kei Wan
33.0
64.0
97.0
SEK Shek Kong
[28.0]
[39.0]
[67.0]
K06 So Uk Estate
27.0
69.0
96.0
R31 Tai Mei Tuk
12.0
43.0
55.0
R21 Tap Shek Kok
18.0
29.0
47.0
N17 Tung Chung
47.0
50.5
97.5

Last Accessed 最近訪問日期: Wed Mar 20 2019 23:51:58 HKT
Last Modified 最近修訂日期: Tue Oct 11 2016

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