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TC Watch / 熱帶氣旋 > Selected TC Review / 重要熱帶氣旋回顧 > 202610W (MAYSAK 美莎克) [Refresh 更新]

202610W (MAYSAK 美莎克) - Profile 檔案

(First draft issued on July 12, 2026)
(初稿於 2026 年 7 月 12 日發出)

Brief profile of MAYSAK | 美莎克小檔案:

^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
	2026/07/02 (THU) 07:40 HKT	S 630 km	WNW at 22 km/h	45 km/h (25 knots, TD)
	2026/07/04 (SAT) 03:20 HKT**	WSW 610 km	NW/NNW at 15 km/h	75 km/h (40 knots, TS)

*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 at 03:21 HKT.
**強烈季候風信號於上午 3 時 21 分發出。

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）

MAYSAK developed as tropical disturbance 96W near central Philippines in late June. 96W moved into the South China Sea early on July 1, and the JTWC issued a tropical cyclone formation alert at 2 am. The JMA issued a gale warning for the system 6 hours later, while the NMC upgraded it into a tropical depression.

96W's structure was poor. Affected by a parcel of dry air and the vertical wind shear, there were few convective activities in 96W's northeastern quadrant. Most of the convections were concentrated in the southern and western sides. The system initially moved northwest along the southwestern side of the subtropical ridge; it turned west-northwest early on July 2 and moved to the seas south of Hainan Island that night. The JTWC upgraded 96W into tropical depression 10W early on July 2.

10W showed signs of development and decelerated significantly in the small hours of July 3. Intense convective bursts were seen developing near its centre. The JMA upgraded 10W into tropical storm MAYSAK at 2 am. As the subtropical ridge receded, MAYSAK turned northwest to north-northwest that day. According to the NMC, MAYSAK made landfall near Lingshui County, Hainan at around 6:20 pm, with estimated winds of 23 m/s (83 km/h) near its centre.

MAYSAK weakened slightly as it crossed Hainan that night. Taking on a north-westerly course, MAYSAK entered the Gulf of Tonkin shortly after midnight July 4. The warm seas allowed MAYSAK to re-intensify; its core developed further and most official agencies upgraded it into a severe tropical storm in the afternoon or night of July 4. The storm turned north and made landfall near the China-Vietnam border at around 9 pm.

After making landfall, MAYSAK turned north-northeast early on July 5 as it weakened gradually on land. It crossed Guangxi that day and weakened into a tropical storm. It later moved into Hunan and weakened into an area of low pressure on July 6.

美莎克於 6 月下旬在菲律賓中部一帶發展，當時為熱帶擾動 96W。96W 於 7 月 1 日早段進入南海，聯合颱風警報中心於上午 2 時發出熱帶氣旋形成警報。6 小時後，日本氣象廳對該系統發出烈風警告，而中國中央氣象台則將其升格為熱帶低氣壓。

受乾空氣及垂直風切變影響，96W 的結構較差；其東北象限對流稀疏，大部份對流集中於南部及西部。系統初時沿副熱帶高壓脊西南部向西北移動，於 7 月 2 日早段轉向西北偏西，當晚移至海南島以南海域。聯合颱風警報中心於 2 日早段將其升格為熱帶低氣壓 10W。

7 月 3 日凌晨，10W 有跡象發展並明顯減速，系統近中心有猛烈對流爆發，日本氣象廳於上午 2 時將 10W 升格為熱帶風暴美莎克。隨著副熱帶高壓脊東退，美莎克當天轉向西北至西北偏北移動。中央氣象台指美莎克於下午約 6 時 20 分登陸海南陵水縣，估計近中心風速達每秒 23 米（每小時 83 公里）。

美莎克當晚橫過海南並稍為減弱。它向西北移動，並於 7 月 4 日午夜後不久進入北部灣。該區溫暖的海域令美莎克再度增強，其核心進一步發展，大部份官方機構於 4 日下午至晚間將其升格為強烈熱帶風暴。美莎克轉向偏北移動，並於下午 9 時左右登陸中越邊境一帶。

登陸後，美莎克於 7 月 5 日早段轉向東北偏北移動。當天風暴橫過廣西並減弱為熱帶風暴。其後，美莎克移入湖南，並於 6 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: 2/7 ● 3/7 ● 4/7
香港天文台相關天氣報告連結： 2/7 ● 3/7 ● 4/7

Under the influence of a subtropical ridge, it was mostly fine with sunny periods in Hong Kong on July 1. Near midday, the HK Observatory upgraded MAYSAK into a tropical depression; it suggested that the #1 Standby Signal would be issued in the morning of July 2, and that the local weather would become unstable on July 3 with the possibility of brief gales on high ground.

MAYSAK came to within 800 km of Hong Kong in the night of July 1. After an advance notification at 5 am, the #1 Standby Signal was issued at 7:40 am July 2, when MAYSAK was about 630 km south of Hong Kong. There was still some sunshine that day, although scattered showers started to affect the territory. Easterly winds also strengthened in offshore areas and on high ground; winds at stations such as Cheung Chau and Ngong Ping were consistently near or above the strong force threshold. In the afternoon, the Observatory suggested that the #1 Signal would remain in force at least until midday the next day. Due to MAYSAK's persistent westward motion, the storm receded to a distance of about 660 km by midnight July 3.

A rainband affected Hong Kong in the morning of July 3, and a stronger one approached from the southeast in the afternoon. The Amber Rainstorm Warning was issued at 2:10 pm, and lasted for two hours. A temporary surge in wind speeds was observed at many places; gales were recorded at Cheung Chau, Ngong Ping and Waglan Island. Nevertheless, the rainband was short-lived and winds moderated to earlier levels after its passage.

Having extended the duration of the #1 Signal to at least 6 pm earlier, the Observatory mentioned in its 4 pm tropical cyclone warning that the chance of upgrading the signal was relatively low unless MAYSAK intensified significantly or moved closer to the Guangdong coast. It also mentioned that a southeast monsoon associated with the ridge of high pressure would result in windy and showery conditions on July 4. Local winds weakened towards the late afternoon of July 3 as MAYSAK made landfall in Hainan Island.

The #1 Standby Signal was cancelled at 3:20 am July 4, when MAYSAK was around 610 km west-southwest of Hong Kong. The Strong Monsoon Signal was issued one minute later. It was mainly cloudy during the day with a few squally showers; the Amber Rainstorm Warning was in force again that afternoon. Winds reached strong to gale force at a few locations when a strong rainband approached the territory, but weakened significantly afterwards. The Strong Monsoon Signal was cancelled at 4:45 pm. Influenced by an active southerly airstream, occasional showers continued to affect Hong Kong over the next couple of days.

受一道副熱帶高壓脊影響，本港 7 月 1 日大致天晴，日間部分時間有陽光。接近正午時份，香港天文台將美莎克升格為熱帶低氣壓，並指出將於 2 日早上發出一號戒備信號，而 3 日天氣轉趨不穩定，高地可能短暫吹烈風。

美莎克於 7 月 1 日晚間進入本港 800 公里範圍。2 日上午 5 時，天文台表示會於當日上午 7 時 40 分發出一號戒備信號，而信號發出時美莎克位於香港以南約 630 公里。當日仍然有陽光，但驟雨開始影響本港，離岸及高地東風有所增強，長洲及昂坪等地風力持續接近或達強風水平。下午，天文台表示一號信號將至少維持至翌日正午。由於美莎克持續西移，它於 3 日午夜遠離至距港 660 公里左右。

一道雨帶於 7 月 3 日早上影響本港，而下午另一道較強雨帶由東南方靠近。黃色暴雨警告於下午 2 時 10 分發出，並生效了 2 小時，期間多區風力短暫上升，長洲、昂坪及橫瀾島錄得烈風。但是，雨帶影響時間較短，風勢其後緩和至先前水平。

天文台將一號信號生效時間延長為至少到下午 6 時，並於下午 4 時的熱帶氣旋警報中提及除非美莎克顯著增強或移近廣東沿岸，否則改發更高信號的機會較低。同時，與高壓脊相關的東南季候風將於 7 月 4 日帶來大風及驟雨。隨著美莎克登陸海南島，本港風勢於 3 日下午較後時間減弱。

一號戒備信號於 7 月 4 日上午 3 時 20 分取消，美莎克當時位於香港西南偏西約 610 公里，而強烈季候風信號於一分鐘後發出。當日本港大致多雲並有幾陣狂風驟雨，天文台下午再度發出黃色暴雨警告。強雨帶靠近時，部分地區風力達強風至烈風程度，但隨後明顯減弱；強烈季候風信號於下午 4 時 45 分取消。受一道活躍偏南氣流影響，香港其後數天仍間中有驟雨。

Image Gallery 圖片庫

Figure 1 - ECMWF (left) and FNV3 (right) ensemble forecasts in late June suggested the formation of a tropical cyclone within the South China Sea
圖 1 - 6 月下旬 ECMWF（左）及 FNV3（右）集成預報模式顯示南海將有熱帶氣旋形成

Figure 2 - Satellite image of MAYSAK at 2 am July 2, showing that most of its convections were displaced to the south
圖 2 - 7 月 2 日上午 2 時美莎克之衛星雲圖，顯示其大部份對流偏離至南方

Figure 3 - Vertical wind shear distribution map at 8 am July 2
圖 3 - 7 月 2 日上午 8 時之垂直風切變分佈圖

Figure 4 - 500 hPa upper-level weather map at 8 am July 2
圖 4 - 7 月 2 日上午 8 時之 500 百帕高空天氣圖

Figure 5 - Forecast tracks from various official agencies on July 3
圖 5 - 7 月 3 日之官方機構預測路徑圖

Figure 6 - Wind field analysis map at 9:25 am July 3
圖 6 - 7 月 3 日上午 9 時 25 分之風場分析圖

Figure 7 - Radar image at 2 pm July 3; a strong rainband was approaching Hong Kong at that time
圖 7 - 7 月 3 日下午 2 時之雷達圖，當時一道強雨帶正靠近本港

Figure 8 - Satellite image of MAYSAK as it was about to make landfall near the China-Vietnam border
圖 8 - 美莎克接近登陸中越邊境時之衛星雲圖

Figure 9 - Radar image of MAYSAK shortly after rainfall, showing its intense convections near the centre
圖 9 - 美莎克登陸後不久之雷達圖，其中心附近對流猛烈

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 MAYSAK 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: Mon Aug 17 2026 15:44:24 HKT
Last Modified 最近修訂日期: Sun Jul 12 2026