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TC Watch / 熱帶氣旋 > Selected TC Review / 重要熱帶氣旋回顧 > 202501W (WUTIP 蝴蝶) [Refresh 更新]

202501W (WUTIP 蝴蝶) - Profile 檔案

(First draft issued on June 22, 2025)
(初稿於 2025 年 6 月 22 日發出)

Brief profile of WUTIP | 蝴蝶小檔案:

^Refers to the period between the HK Observatory's first and last bulletins for the tropical cyclone (with at least tropical depression intensity). For storms formed/dissipated/transformed into an extratropical cyclone outside the area bounded by 7-36°N and 100-140°E, information from the JTWC will be used instead.
^即香港天文台為該熱帶氣旋（熱帶低氣壓級或更高）作出發佈的時期。至於在北緯 7 至 36 度、東經 100 至 140 度外形成／消散／轉化為溫帶氣旋的風暴，本網將參考聯合颱風警報中心的資料。

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
	2025/06/11 (WED) 00:40 HKT	S 780 km	WNW at 10 km/h	45 km/h (25 knots, TD)
	2025/06/14 (SAT) 12:20 HKT	WSW 510 km	NE at 22 km/h	110 km/h (60 knots, STS)
	2025/06/15 (SUN) 15:40 HKT**	N 380 km	NE/ENE at 38 km/h	45 km/h (25 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。

**The Strong Monsoon Signal was issued one minute after the #3 Strong Wind Signal was cancelled.
**強烈季候風信號於三號強風信號取消後一分鐘發出。

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(s) from HKO 天文台的熱帶氣旋路徑圖:

TBA 稍後公佈

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 tropical disturbance, numbered 92W by the JTWC, formed in the seas east of the Philippines in early June. It moved into the South China Sea and started to develop several days later. The JMA issued a gale warning at 8 am June 10 and predicted a gradual recurvature of the system into Hainan Island and Guangdong. The JTWC issued a tropical cyclone formation alert at 2 pm the same day, and further upgraded the system into tropical depression 01W six hours later.

Initially, there were significant differences among the numerical model predictions. However, by the time of 01W's formation, they generally agreed that 01W would recurve due to a weakening of the subtropical ridge covering southern China. They also predicted that 01W would intensify gradually before reaching Hainan and southern Guangdong.

Due to its monsoon depression nature, 01W's centre was unstable. A relocation that brought 01W's position further north took place on June 11. The JMA upgraded 01W into tropical storm WUTIP that morning. The rather strong vertical wind shear in the region caused most of WUTIP's convections to displace to the west, and the storm moved generally westwards on June 11. The wind shear weakened in the next two days, allowing WUTIP to develop a more solid core as it turned west-northwest to northwest in response to the reorientation of the subtropical ridge.

Various official agencies upgraded WUTIP into a severe tropical storm (or an equivalent intensity of 50 knots / 93 km/h) between June 12 and June 13. A formative eye appeared on satellite images as WUTIP turned north in the afternoon of June 13. The NMC upgraded WUTIP into a typhoon that night, and declared a landfall at Dongfang, Hainan near 11 pm. The storm weakened into a severe tropical storm after landfall.

WUTIP's core was affected somewhat while on land, but it started to regain strength soon after it entered the Gulf of Tonkin. As the eye formed again, the NMC and JTWC upgraded WUTIP into a typhoon at 8 am June 14. The storm turned north-northeast and made a second landfall at Leizhou, Guangdong near 12:30 pm. WUTIP then continued to move north-northeast as it weakened gradually on land into a tropical storm in the afternoon of June 14, and further into a tropical depression early on June 15. The storm accelerated towards the northeast and weakened into an area of low pressure in Fujian province that night.

被聯合颱風警報中心（聯颱）給予編號 92W 的熱帶擾動於 6 月初在菲律賓以東海域形成。它數天後移入南海，日本氣象廳於 6 月 10 日上午 8 時對其發出烈風警告，預料該系統將逐漸轉向至海南島及廣東。聯颱則於同日下午 2 時發出熱帶氣旋形成警報，6 小時後將其升格為熱帶低氣壓 01W。

各數值模式初時對此系統的預測出現明顯分歧，但至 01W 形成時，多數模式均預料覆蓋南海的副熱帶高壓脊會減弱，繼而令 01W 轉向，並於到達海南及廣東前逐漸增強。

由於 01W 屬季風低壓，其中心並不穩定，6 月 11 日曾作重新定位，令其位置北移。日本氣象廳當天早上將 01W 升格為熱帶風暴蝴蝶。該區垂直風切變頗強，令蝴蝶的對流偏離至風暴西面，而它於 11 日亦大致西移。風切變於隨後兩天有所減弱，令蝴蝶的核心得以整固。隨著副高形態改變，蝴蝶開始向西北偏西至西北移動。

各官方氣象台於 6 月 12 至 13 日將蝴蝶升格為強烈熱帶風暴（或等同於 50 節／每小時 93 公里強度的分類）。13 日下午蝴蝶北轉，衛星圖上出現其風眼的雛形。中國中央氣象台當晚將蝴蝶升格為颱風，並表示它於下午約 11 時登陸海南東方市，隨後減弱為強烈熱帶風暴。

蝴蝶的核心受登陸影響，但它進入北部灣後不久即開始重新增強。它的風眼再度形成，中央氣象台及聯颱於 6 月 14 日上午 8 時將其升格為颱風。風暴轉向東北偏北移動，於下午 12 時 30 分左右於廣東雷州市二次登陸。登陸後，蝴蝶繼續向東北偏北移動，當天下午逐漸減弱為熱帶風暴，15 日早段進一步減弱為熱帶低氣壓。風暴其後加速向東北移動，並於 15 日晚於福建省減弱為低壓區。

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

Link to relevant HKO weather report bulletins: 11/6 ● 12/6 ● 13/6 ● 14/6 ● 15/6
香港天文台相關天氣報告連結： 11/6 ● 12/6 ● 13/6 ● 14/6 ● 15/6

As WUTIP demonstrated its potential for development on June 9, the HK Observatory issued a Special Weather Tip that mentioned the formation of this tropical cyclone, and indicated that the #1 Standby Signal might be issued in the night of June 10 or early on June 11. The possibility of a higher signal was also mentioned.

Influenced by the subtropical ridge, it was extremely hot in Hong Kong on June 10. The Observatory registered a maximum temperature of 35.6 degrees, levelling the record for June. The temperature at Lau Fau Shan even reached 38.9 degrees, just 0.1 degrees lower than the city-wide maximum temperature ever recorded. The Observatory upgraded WUTIP into a tropical depression at 9 pm June 10, and suggested the issuance of the #1 Signal at 12:40 am June 11.

Typical of monsoon depressions, WUTIP's winds were stronger at its periphery at first. Coupled with the ridge of high pressure in southern China, winds in Hong Kong strengthened in the afternoon and night of June 11. Strong easterly winds were observed at a number of stations, including two of the eight reference stations (Cheung Chau and Sai Kung). Sustained winds at Ngong Ping and Tate's Cairn, both elevated, even reached gale force overnight. The Observatory kept the #1 Signal, and mentioned that winds might weaken slightly on June 13 before picking up again later. It is worth noting that the Signal #3 was in force in Macau between 6 am and 6 pm on June 12.

There were some showers on June 11 and 12, with most places receiving more than 10 mm of rain on June 12. Winds moderated that night but showers became heavier on June 13. A spike in wind speeds was observed near 3 pm June 13 as a rainband approached. At 5 pm, the Observatory stated that the #1 Signal would remain in force at least until noon June 14. However, winds were expected to strengthen as WUTIP moved closer to the territory, and the need for the #3 Strong Wind Signal would be assessed in the afternoon of June 14.

As WUTIP turned north and moved into the Gulf of Tonkin, local winds turned south and strengthened in the small hours of June 14. By late morning, sustained strong force winds were observed at Chek Lap Kok, Cheung Chau, Green Island, Sha Chau, Tate's Cairn and Waglan Island, and gale force winds were observed at Ngong Ping. At 10 am, the Observatory announced that the #3 Strong Wind Signal would be issued at 12:20 pm; the storm was about to make its second landfall and was around 510 km west-southwest of Hong Kong at the time of the signal change. It also mentioned that the #3 Signal would remain in force at least until noon June 15, but the chance of issuing the #8 Gale or Storm Signal was rather low unless WUTIP remained stronger and got closer to Hong Kong than expected.

The strongest winds in the territory were generally observed in the night of June 14 and the small hours of June 15. Tsing Yi, one of the eight reference stations that rarely sees strong winds during the approach of storms that only necessitate the #3 Signal, recorded a sustained wind speed of 42 km/h at 11:50 pm June 14. WUTIP was closest to Hong Kong near 5-6 am June 15, passing at a distance of 280 km to the northwest. At 8 am, the Observatory mentioned that it might consider issuing the #1 Standby Signal or the Strong Monsoon Signal in the afternoon depending on the changes in local wind conditions and WUTIP's strength.

Winds did not weaken significantly in the early afternoon of June 15, but WUTIP had already weakened into a tropical depression by that time. The #3 Strong Wind Signal was cancelled at 3:40 pm, and the Strong Monsoon Signal was issued one minute later. As WUTIP moved further away and continued to weaken, local winds finally moderated that night, and the Strong Monsoon Signal was cancelled at 9 pm. The Observatory also downgraded WUTIP into an area of low pressure at about the same time.

An active southwesterly airstream continued to affect southern China in the wake of WUTIP's approach. The weather in Hong Kong remained unstable on June 16 and 17. The Amber Rainstorm Warning was in force in the morning of June 17, and more than 40 mm of rain was received over many parts of the territory.

隨著蝴蝶於 6 月 9 日呈發展之勢，香港天文台發出特別天氣提示，表示此氣旋將會形成，並或於 10 日晚上至 11 日初段發出一號戒備信號。該提示同時提及發出較高信號的可能性。

受副熱帶高壓脊影響，6 月 10 日香港天氣極端酷熱。天文台當天錄得氣溫達 35.6 度，打平 6 月的最高紀錄。流浮山的氣溫更高達 38.9 度，只比全港歷史高溫低 0.1 度。天文台於 10 日下午 9 時將蝴蝶升格為熱帶低氣壓，並表示會於 11 日上午 12 時 40 分發出一號信號。

蝴蝶形成初時，其外圍風力較強，這是季風低壓的典型特徵。加上受華南高壓脊的共同影響，本港風力於 6 月 11 日下午及晚間增強。部分氣象站，包括 8 個參考站的其中兩個（長洲及西貢），當晚吹偏東強風。位於高地的昂坪及大老山，12 日凌晨持續風力達烈風程度。天文台維持一號信號，並表示風力將於 13 日稍為減弱，隨後或再度增強。值得留意的是澳門方面曾於 12 日上午 6 時至下午 6 時間改發三號風球。

6 月 11 及 12 日本港有幾陣驟雨，12 日多區錄得超過 10 毫米雨量。風勢於當晚緩和，但驟雨於 13 日轉強，一道雨帶到來令風勢於當天下午 3 時短暫急升。下午 5 時，天文台指出一號信號將至少維持至 14 日正午，但隨著蝴蝶靠近，預料風勢將會增強，會於 14 日下午評估是否需要改發三號強風信號。

6 月 14 日凌晨，蝴蝶北移並進入北部灣，本港轉吹南風，風力有所增強。至上午後段，赤鱲角、長洲、青洲、沙洲、大老山及橫瀾島等地錄得持續強風，而昂坪則吹烈風。上午 10 時，天文台宣佈將於下午 12 時 20 分改發三號信號。信號改發時，風暴即將再次登陸，於香港西南偏西約 510 公里。天文台同時指出，三號信號將至少維持至 15 日正午，但除非蝴蝶較預測強且更為接近香港，否則改發八號信號的機會甚低。

本港風勢普遍於 6 月 14 日晚間至 15 日凌晨最強，其中屬 8 個參考站之一的青衣於 14 日下午 11 時 50 分錄得每小時 42 公里的強風。令香港發出三號信號的熱帶氣旋中，青衣較少出現強風風力。蝴蝶於 15 日上午 5 至 6 時最接近本港，於西北方約 280 公里處掠過。上午 8 時，天文台表示將視乎本港風力變化及蝴蝶的強度，於下午考慮改發一號戒備信號或強烈季候風信號。

6 月 15 日下午初段香港風勢並未明顯減弱，但蝴蝶已減弱為熱帶低氣壓。三號強風信號於下午 3 時 40 分取消，一分鐘後強烈季候風信號發出。隨著蝴蝶進一步遠離並減弱，本港風勢當晚終於緩和，強烈季候風信號於下午 9 時取消，而天文台亦於差不多相同時間將蝴蝶降格為低壓區。

蝴蝶掠過後，一道活躍西南氣流繼續影響華南，本港天氣於 6 月 16 及 17 日仍然不穩定。天文台曾於 17 日早上發出黃色暴雨警告，當天本港多區錄得超過 40 毫米雨量。

Image Gallery 圖片庫

Figure 1 - Numerical model ensemble forecasts (left - ECMWF; right - GFS) at 8 am June 9
圖 1 - 6 月 9 日上午 8 時之數值模式集成預報（左：ECMWF；右：GFS）

Figure 2 - Satellite image of WUTIP at its formation
圖 2 - 蝴蝶形成時之衛星雲圖

Figure 3 - Forecast tracks from various official agencies at 8 am June 11
圖 3 - 6 月 11 日上午 8 時之官方機構預測路徑圖

Figure 4 - Wind field analysis maps at 9:58 pm June 11 (left) and 10:58 am June 14 (right)
圖 4 - 6 月 11 日下午 9 時 58 分（左）及 14 日上午 10 時 58 分（右）之風場分析圖

Figure 5 - Vertical wind shear distribution map (top) and steering flow chart (bottom) at 8 am June 12
圖 5 - 6 月 12 日上午 8 時之垂直風切變（上）及駛流場（下）分佈圖

Figure 6 - Satellite image of WUTIP at 8:30 am June 14
圖 6 - 6 月 14 日上午 8 時 30 分蝴蝶之衛星雲圖

Figure 7 - Radar image at 7 am June 15 showing WUTIP's circulation
圖 7 - 6 月 15 日上午 7 時之雷達圖顯示蝴蝶的環流

Figure 8 - Local weather element distribution map at 3 am June 12 (left) and 4 am June 15 (right) (strong winds or above are represented by red wind barbs)
圖 8 - 6 月 12 日上午 3 時（左）及 15 日上午 4 時（右）之本港天氣元素分布圖（強風或以上風速以紅色風矢標示）

Figure 9 - Wind speed time series at Chek Lap Kok, Cheung Chau, Ngong Ping and Tsing Yi (top to bottom) for June 14 and 15
圖 9 - 赤鱲角、長洲、昂坪及青衣（上至下）於 6 月 14 至 15 日之風速時間序列圖

Figure 10 - Daily rainfall distribution maps for June 13 (left) and June 17 (right)
圖 10 - 6 月 13 日（左）及 17 日（右）之雨量分佈圖

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. In 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。

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 WUTIP 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: Wed Jul 09 2025 11:56:29 HKT
Last Modified 最近修訂日期: Sat Jun 28 2025