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TC Watch / 熱帶氣旋 > Selected TC Review / 重要熱帶氣旋回顧 > 202002W (NURI 鸚鵡) [Refresh 更新]

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:

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:

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 from HKO 天文台的熱帶氣旋路徑圖:

TC track with signal information 附有熱帶氣旋警告信號資料的路徑圖:

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

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: 12/6 ● 13/6 ● 14/6
香港天文台相關天氣報告連結：12/6 ● 13/6 ● 14/6

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 tropicaltidbits 及 Typhoon2000 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

The following table lists the maximum 10-minute average (sustained) wind speed recorded while tropical cyclone signals were in force. On some occasions, it is possible that the strongest winds were not recorded when the highest signal was in force.

下表列出各站於熱帶氣旋警告信號生效時所錄得的最高 10 分鐘平均 (持續) 風速，留意此風速不一定於最高信號生效期間錄得。

*A wind speed of 35 km/h was recorded just after the cancellation of tropical cyclone signals. 熱帶氣旋警告信號取消後不久，該站錄得每小時 35 公里的風速。

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

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)

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)

Last Accessed 最近訪問日期: Sat Apr 20 2024 00:17:12 HKT
Last Modified 最近修訂日期: Mon Jul 24 2023