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202002W (NURI 鸚鵡) - Profile 檔案

(First draft issued on June 17, 2020; final version issued on July 30, 2020)
(初稿於 2020 年 6 月 17 日發出,最後版本於 2020 年 7 月 30 日上載)

Brief profile of NURI | 鸚鵡小檔案:

JTWC number 聯合颱風警報中心 (JTWC) 號碼 02W
International number 國際編號 2002
Period of existence 生存時期 (JTWC) 2020/06/12 08 HKT - 2020/06/14 14 HKT
Lifetime 壽命 (JTWC) 2.25 days 日
Maximum 1-minute wind (JTWC) JTWC 一分鐘平均最高中心風速

35 knots 節 (Tropical Storm 熱帶風暴)

Minimum pressure (JTWC) JTWC 最低氣壓 998 hPa 百帕
Highest TC signal by HKO
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
香港天文台所示之最接近距離
SW 190 km (real-time warning 實時報告) / SSW 190 km (TC report 熱帶氣旋報告)
Time of closest approach by HKO
香港天文台所示之最接近時間
2020/06/14 04 HKT (real-time warning 實時報告) / 02 HKT (TC report 熱帶氣旋報告)
Lowest pressure recorded at HKO
香港天文台錄得的最低氣壓
1002.5 hPa 百帕 (2020/06/13 16:48 HKT)

TC signals in Hong Kong* 香港曾經生效的熱帶氣旋警告*:

Signal
信號
Date and time
日期和時間
Distance from HK
與香港的距離
Predicted movement
預測移動趨勢
Max. 10-min winds
中心最高十分鐘平均風速
2020/06/12 (FRI) 20:20 HKT SSE 740 km NW at 22 km/h 55 km/h (30 knots, TD)
2020/06/13 (SAT) 15:40 HKT SSE 290 km NW at 22 km/h 75 km/h (40 knots, TS)
2020/06/14 (SUN) 10:40 HKT WSW 260 km NW at 22 km/h 55 km/h (30 knots, TD)
2020/06/14 (SUN) 13:20 HKT W 280 km NW at 22 km/h 55 km/h (30 knots, TD)

*Based on the information from real-time tropical cyclone warning bulletins.
*根據實時熱帶氣旋警報資料。

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:
40
  Moderate
中等
Component Ranks 分部等級
  Reference stations:
參考站:
40
  Moderate
中等
  Victoria Harbour:
維多利亞港:
43
  Moderate
中等
  Urban:
市區:
42
  Moderate
中等
  Offshore & high ground
離岸和高地:
35
  Moderately weak
中等偏弱

Cyclones that attained similar rating (with signal #3): BEBINCA (2013), SOUDELOR (2009), WUKONG (2000), noname (2000/6), noname (1999/7), ZEKE (1991)
相近級別之熱帶氣旋 (三號信號):貝碧嘉 (2013)、蘇迪羅 (2009)、悟空 (2000)、無名 (2000/6)、無名 (1999/7)、澤奇 (1991)

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 tracks 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)

Tropical disturbance 98W developed in the seas east of the Philippines in early June. The numerical model GFS was among the first to indicate its development and predict a landfall close to Hong Kong in a week's time. On June 11, 98W showed signs of development. The JTWC issued a tropical cyclone formation alert that night, while the JMA issued a gale warning on the system. The HKO also suggested that a tropical cyclone appeared to be forming. The NMC upgraded 98W into a tropical depression at 8 pm and predicted the storm to intensify while it approached southern China.

98W crossed Luzon during the night and entered the South China Sea in the morning of June 12. Still situated in the southwestern periphery of the Pacific subtropical ridge, the system was expected to move northwest. The JTWC upgraded it into tropical depression 02W at that time. As 02W moved into very warm waters, it started to pick up strength and vigorous convective activities could be seen in its periphery. The JMA upgraded 02W into tropical storm status at 8 pm and named it NURI; both the NMC and HKO followed soon after.

NURI continued its journey across the South China Sea on June 13. However, the atmospheric environment deteriorated as the storm reached the northern part of the Sea. The level of vertical wind shear increased significantly, resulting in NURI's convections being displaced to its southwestern quadrant. Nevertheless, NURI remained as a tropical storm and maintained a northwestward track in general until its landfall near Yangjiang, Guangdong just after 8 am on June 14.

After making landfall, NURI weakened quickly and started to turn west-northwest across western Guangdong. It entered Guangxi a few hours later and weakened into an area of low pressure in the afternoon of June 14.

熱帶擾動 98W 於 6 月上旬在菲律賓以東海域形成。數值預報模式 GFS 率先預計其發展,並顯示該系統將於約一周後登陸香港附近。6 月 11 日,98W 有跡象發展;聯合颱風警報中心當晚對其發出熱帶氣旋形成警報,而日本氣象廳則發出烈風警告。香港天文台表示一熱帶氣旋似乎正在形成,而中央氣象台於下午 8 時升格該系統為熱帶低氣壓,預料將於靠近華南時增強。

98W 於晚間橫過呂宋,並於 12 日早上進入南海。由於 98W 仍處於太平洋高壓脊西南方,當時預料它將向西北移動。聯合颱風警報中心將其升格為熱帶低氣壓 02W。隨著 98W 進入非常溫暖的海域,它開始逐漸增強,其周邊有猛烈對流活動。日本氣象廳於下午 8 時將 02W 升格為熱帶風暴並命名為鸚鵡,而隨後中央氣象台及香港天文台亦作出升格。

鸚鵡於 13 日繼續橫過南海,但南海北部大氣環境較差,垂直風切變明顯增強,令鸚鵡的對流被大幅切離至其西南象限。雖然如此,鸚鵡仍維持熱帶風暴強度並繼續大致向西北移動,直至於 14 日上午 8 時過後登陸廣東陽江一帶。

登陸後,鸚鵡快速減弱並開始向西北偏西移動,橫過廣東西部。它於數小時後進入廣西,並於 14 日下午減弱為低壓區。

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

Link to relevant HKO weather report bulletins: 12/613/614/6
香港天文台相關天氣報告連結12/613/614/6

The weather was very hot before NURI's approach. The HKO's maximum air temperature was 35.0 degrees on June 12, the highest in the year so far. The #1 Standby Signal was issued at 8:20 pm that night when NURI was about 740 km from Hong Kong. As NURI edged closer on June 13, winds started to strengthen early that afternoon. The HKO indicated that the #3 Strong Wind Signal would be issued between 2 and 4 pm, and eventually issued the signal at 3:40 pm. NURI's rainbands were sparse in its northern periphery; there were a few showers on June 13, mainly in the morning and at night. However, the total daily rainfall was below 20 mm in most parts of the territory.

In the first tropical cyclone bulletin following the signal upgrade, the HKO suggested that higher signals would be unlikely due to its small gale wind area, unless the storm moved closer to Hong Kong or intensified significantly. At this point, strong winds were mostly observed in outlying islands and on high ground such as Waglan Island, Green Island and Tate's Cairn. The easterly winds picked up gradually during the night; Cheung Chau was the first reference station to register strong force winds. Strong winds were also recorded at Kowloon Star Ferry Pier, an urban station, briefly after 1 am. Gusts occasionally reached gale force on high ground and in offshore waters. It should be noted that sustained gales of force 8 were recorded at Huangmaozhou, 50 km south of Hong Kong, during the night of June 13 as mentioned in the HKO's South China Coastal Waters report.

NURI made its closest point of approach to Hong Kong during the small hours of June 14, skirting past at a distance of about 190 km to the south-southwest. As the storm made landfall in western Guangdong in the morning, winds in Hong Kong abated. Nevertheless, winds at Chek Lap Kok reached strong force for the first time during NURI's approach as late as after 9 am. The HKO issued the #1 Standby Signal at 10:40 am as winds continued to moderate, and the #1 Signal was cancelled at 1:20 pm.

Due to an active southerly airstream lingering over southern China in the wake of NURI's approach, the weather in Hong Kong remained unstable for the rest of June 14. Over 40 mm of rain fell over parts of the territory during the day. The weather improved gradually on June 15.

鸚鵡靠近前香港天氣酷熱。香港天文台於 6 月 12 日錄得最高氣溫 35.0 度,為本年至今最高。一號戒備信號於當晚 8 時 20 分發出,鸚鵡距離香港約 740 公里。隨著鸚鵡於 13 日靠近,當天下午風勢開始增強。天文台表示三號強風信號將於下午 2 至 4 時間發出,最終於 3 時 40 分改發。鸚鵡北面的雨帶稀疏,13 日本港只有幾陣驟雨,集中於早上及晚間,當日本港大部分地區雨量不足 20 毫米。

在改發三號信號後的首次熱帶氣旋發佈,天文台表示鸚鵡烈風區細小,除非風暴進一步移近香港或大幅增強,否則改發更高信號可能性不大。此時,強風局限於離島及高地如橫欄島、青洲及大老山。當晚東風逐漸增強,長洲為首個錄得強風的參考測風站,而位處市區的九龍天星碼頭亦於 14 日上午 1 時後短暫吹強風。凌晨時份,離岸及高地陣風間中達烈風程度。值得留意的是,天文台於 13 日晚發佈的華南海域天氣報告曾表示於香港以南約 50 公里的黃茅州曾持續吹 8 級烈風。

鸚鵡於 14 日凌晨最接近香港,於西南偏南方約 190 公里處掠過。隨著鸚鵡於上午登陸廣東西部,香港風勢開始減弱。雖然如此,赤鱲角於上午 9 時過後才首次錄得強風。由於此後風勢繼續緩和,天文台於上午 10 時 40 分改發一號戒備信號,繼而於下午 1 時 20 分取消該信號。

鸚鵡過後,華南受一道活躍偏南氣流影響,14 日餘下時間香港天氣仍然不穩定,部分地區錄得超過 40 毫米雨量,而天氣於 15 日逐漸改善。

Image Gallery 圖片庫

Figure 1 - GFS forecast map on June 9 (above) and forecast tracks from several numerical models on June 10 (bottom) (Images from tropicaltidbits and Typhoon2000)
圖 1 - 6 月 9 日 GFS 的預報圖 (上) 及 6 月 10 日部分數值模式預報圖 (下) (圖像由 tropicaltidbitsTyphoon2000 網站擷取)

Figure 2 -Satellite image of NURI at its formation
圖 2 - 鸚鵡初形成時之衛星雲圖

Figure 3 - Steering flow chart at 8 am June 12
圖 3 - 6 月 12 日上午 8 時之駛流場圖

Figure 4 - Forecast tracks from various official agencies in the night of June 12
圖 4 - 6 月 12 日晚間各官方氣象台之預測路徑

Figure 5 - Wind field analysis at 9:46 am June 13; winds were relatively weak in NURI's northern semicircle.
圖 5 - 6 月 13 日上午 9 時 46 分之風場掃描圖,可見鸚鵡北半圓風勢較弱。

Figure 6 - Radar images at 4-hour intervals from 2 pm June 13 to 10 am June 14
圖 6 - 6 月 13 日下午 2 時至 14 日上午 10 時每四小時之雷達圖

Figure 7 - Local wind distribution maps at 4-hour intervals from 2 pm June 13 to 10 am June 14
圖 7 - 6 月 13 日下午 2 時至 14 日上午 10 時每四小時之本港風勢分布圖

Figure 8 - Satellite image of NURI near its closest point of approach to Hong Kong
圖 8 - 鸚鵡最接近香港時之衛星雲圖

Figure 9 - Vertical wind shear distribution map at 8 am June 14
圖 9 - 6 月 14 日上午 8 時之垂直風切變分佈圖

Figure 10 - Wind speed time series at Cheung Chau, Chek Lap Kok, Sai Kung and Waglan Island (top to bottom) on June 13-14
圖 10 - 長洲、赤鱲角、西貢及橫欄島 (上至下) 於 6 月 13-14 日之風速時間序列圖

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 46 km/h STRONG 強風
Cheung Chau 長洲 57 km/h STRONG 強風
Kai Tak 啟德 40 km/h Fresh 清勁
Lau Fau Shan 流浮山 35 km/h* Fresh 清勁
Sai Kung 西貢 49 km/h STRONG 強風
Sha Tin 沙田 26 km/h Moderate 和緩
Ta Kwu Ling 打鼓嶺 24 km/h Moderate 和緩
Tsing Yi (SHL) 青衣蜆殼油庫 30 km/h Moderate 和緩

*Recorded after the cancellation of tropical cyclone signals. 於熱帶氣旋警告信號取消後錄得。

Number of stations recording at least STRONG force (force 6 - 7) winds: 3
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: 3
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
20061112 147N1220E 025
20061118 153N1208E 025
20061200 157N1196E 030
20061206 161N1182E 035
20061212 167N1173E 035
20061218 177N1166E 035
20061300 185N1158E 040
20061306 194N1151E 040
20061312 202N1142E 040
20061318 208N1133E 040
20061400 216N1122E 035
20061406 221N1113E 030
20061412 225N1102E 025

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)

Maximum Gust
Maximum Hourly Mean Wind
Direction
Speed (km/h)
Date/Month
Time
Direction
Speed (km/h)
Date/Month
Time
Central Pier ESE 63 13/6 23:28 ESE 33 13/6 23:00
Cheung Chau E 71 13/6 22:23 E 54 14/6 01:00
Cheung Chau Beach E 69 14/6 00:48 E 50 13/6 23:00
Green Island S 69 14/6 05:56 ENE 45 13/6 20:00
Hong Kong International Airport SE 65 14/6 06:43 E 34 14/6 02:00
Kai Tak ENE 62 13/6 21:44 ESE 30 14/6 03:00
King's Park E 57 13/6 23:50 E 28 13/6 23:00
Lamma Island SE 63 14/6 05:58 E 32 13/6 23:00
Lau Fau Shan SE 51 14/6 06:33 ENE 28 13/6 20:00
North Point ENE 57 13/6 18:26 E 35 13/6 21:00
Peng Chau SE 58 14/6 06:00 E 36 13/6 22:00
Ping Chau SE 42 14/6 02:45 E 10 13/6 16:00
E 10 13/6 20:00
Sai Kung SSE 64 14/6 06:10 SSE 36 14/6 04:00
Sha Chau S 66 14/6 09:28 SE 40 14/6 02:00
Sha Lo Wan ESE 69 14/6 03:55 ESE 26 14/6 02:00
ESE 26 14/6 05:00
Sha Tin SSE 48 14/6 01:42 SE 19 14/6 02:00
SSE 19 14/6 05:00
Star Ferry (Kowloon) ESE 59 14/6 02:19 E 33 13/6 23:00
ESE 59 14/6 06:05
Ta Kwu Ling E 51 13/6 23:08 E 21 14/6 00:00
Tai Mei Tuk E 68 13/6 22:48 E 46 13/6 23:00
Tai Mo Shan ESE 103 13/6 21:47 ESE 75 14/6 00:00
Tai Po Kau SE 55 14/6 01:57 E 32 13/6 22:00
Tap Mun East ESE 73 13/6 22:34 ESE 52 13/6 23:00
Tate's Cairn - 84 13/6 22:25 - 58 13/6 22:00
Tseung Kwan O ESE 53 14/6 01:44 ESE 15 14/6 02:00
Tsing Yi Shell Oil Depot SE 56 14/6 06:18 ESE 26 14/6 05:00
Tuen Mun Government Offices SSE 51 14/6 06:25 SSE 24 14/6 07:00
Waglan Island ENE 75 13/6 18:57 ESE 54 14/6 02:00
Wetland Park ESE 35 13/6 16:12 E 15 13/6 17:00
Wong Chuk Hang E 67 14/6 01:35 E 23 13/6 23:00

Table 3: Rainfall (in millimetres) contributed by NURI 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)

12-Jun
13-Jun
14-Jun
Total Rainfall
(mm)
Hong Kong Observatory (HKO)
0.0
11.7
29.3
41.0
Hong Kong International Airport (HKA)
Trace
3.6
14.5
18.1
Cheung Chau (CCH)
[0.0]
[5.5]
7.0
12.5
H23 Aberdeen
0.0
10.5
15.5
26.0
N05 Fanling
0.0
12.5
15.5
28.0
N13 High Island
0.0
8.0
9.5
17.5
K04 Jordan Valley
0.0
11.0
26.5
37.5
N06 Kwai Chung
0.0
7.5
30.5
38.0
H12 Mid Levels
0.0
6.5
30.0
36.5
N09 Sha Tin
0.5
11.0
24.0
35.5
H19 Shau Kei Wan
0.0
8.5
29.0
37.5
SEK Shek Kong
[0.0]
[9.5]
18.5
28.0
K06 So Uk Estate
0.0
10.5
29.5
40.0
R31 Tai Mei Tuk
0.0
5.5
26.5
32.0
R21 Tap Shek Kok
0.0
10.5
5.0
15.5
N17 Tung Chung
0.0
7.5
27.0
34.5
TMR Tuen Mun Reservoir
0.0
7.7
11.8
19.5

Last Accessed 最近訪問日期: Tue Aug 11 2020 06:31:13 HKT
Last Modified 最近修訂日期: Thu Jul 30 2020

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