MAYSAK has weakened into a severe tropical storm, and is about to make landfall at Luzon. At 8 am, MAYSAK was centred about 250 km (140 NM) NE of Manila.

美莎克已減弱為強烈熱帶風暴，並即將於呂宋登陸。在上午 8 時， 美莎克集結在馬尼拉東北約 250 公里 (140 海里)。

MAYSAK is the 71st name in the tropical cyclone name list. It was contributed by Cambodia, and is a kind of tree. This name was used in 2002 and 2008.

美莎克為熱帶氣旋名稱列表中第 71 個名字，由柬埔寨提供，為一種樹木的名稱。此名曾於 2002 及 2008 年使用。

MAYSAK is expected to move northwest along the southwestern periphery of the subtropical ridge. As a surge of northeast monsoon arrives and MAYSAK weakens, it will decelerate in South China Sea, with a possibility of deflecting to the west as it degenerates.

美莎克將沿副熱帶高壓脊西南部向西北移動。隨著一股東北季候風的到來，美莎克將於南海減弱及減速，後期風暴消散時或會西飄。

Current T-number 現時的 T 號碼: T3.0/3.5/W1.0/24 HRS

MAYSAK's appearance continued to deteriorate and the storm looks fairly disorganized. It will weaken appreciably as it crosses Luzon, and with stronger vertical wind shear and the entrainment of cool, dry air from the northeast monsoon in South China Sea, MAYSAK is expected to dissipate by t+72, before it could reach southern Chinese coast.

美莎克的結構繼續轉差，風暴缺乏組織。美莎克將於橫過呂宋時明顯減弱，而受較強垂直風切變影響及東北季候風造成乾冷空氣入侵，風暴將於 72 小時內消散，未能到達華南沿岸。

A surge of northeast monsoon is due to arrive on Tuesday, when MAYSAK is in the South China Sea. Winds will strengthen from the east, but MAYSAK should weaken quickly enough not to cause major disruption to the territory.

於美莎克橫過南海的同時，預料一股東北季候風將於周二到達，屆時東風會增強。由於預測美莎克減弱速度頗快，它應該不會對香港構成嚴重影響。

2015/04/06 (Mon 一), afternoon 下午 (or earlier 或更早)

MAYSAK has been moving west in the past 24 hours. At 8 am, MAYSAK was centred about 600 km (330 NM) E of Manila.

美莎克於過去 24 小時西移。在上午 8 時， 美莎克集結在馬尼拉以東約 600 公里 (330 海里)。

MAYSAK is the 71st name in the tropical cyclone name list. It was contributed by Cambodia, and is a kind of tree. This name was used in 2002 and 2008.

美莎克為熱帶氣旋名稱列表中第 71 個名字，由柬埔寨提供，為一種樹木的名稱。此名曾於 2002 及 2008 年使用。

MAYSAK is expected to turn WNW to NW as it moves along the southwestern periphery of the subtropical ridge. As a surge of northeast monsoon arrives and MAYSAK weakens, it will decelerate in South China Sea, with a possibility of deflecting to the west as it degenerates.

美莎克將沿副熱帶高壓脊西南部向西北偏西至西北移動。隨著一股東北季候風的到來，美莎克將於南海減弱及減速，後期風暴消散時或會西飄。

Current T-number 現時的 T 號碼: T4.0/4.5/W0.5/24 HRS

MAYSAK's banding structure is still apparent from satellite images. The storm will weaken gradually before making landfall at Luzon, and the mountainous terrain there will disrupt MAYSAK's circulation. Strong vertical wind shear and the entrainment of cool, dry air from the northeast monsoon will see the storm dissipate by t+96, before it could reach southern Chinese coast.

美莎克的雲捲結構於衛星圖上仍非常清晰。預料風暴會於登陸呂宋前逐漸減弱，而呂宋高山地勢將擾亂美莎克的環流。受強垂直風切變影響及東北季候風造成乾冷空氣入侵，風暴將於 96 小時內消散，未能到達華南沿岸。

A surge of northeast monsoon is due to arrive early next week, at about the same time when MAYSAK enters the South China Sea. Expect windy conditions and some rain, but MAYSAK should weaken quickly enough not to cause major disruption to the territory.

於美莎克進入南海的同時，預料一股東北季候風將於下周初到達，屆時風勢將轉強並會有雨。由於預測美莎克減弱速度頗快，它應該不會對香港構成嚴重影響。

2015/04/05 (Sun 日), afternoon 下午 (or earlier 或更早)

MAYSAK has weakened into a category 2 typhoon. At 8 am, MAYSAK was centred about 1080 km (580 NM) E of Manila.

美莎克已減弱為二級颱風。在上午 8 時， 美莎克集結在馬尼拉以東約 1080 公里 (580 海里)。

MAYSAK is the 71st name in the tropical cyclone name list. It was contributed by Cambodia, and is a kind of tree. This name was used in 2002 and 2008.

美莎克為熱帶氣旋名稱列表中第 71 個名字，由柬埔寨提供，為一種樹木的名稱。此名曾於 2002 及 2008 年使用。

A temporary strengthening of the ridge is expected to see MAYSAK move more equatorward in the next 24 hours. After that, the ridge will reorientate into NW-SE direction, allowing MAYSAK to move WNW or even NW. There is substantial uncertainty among model forecasts after MAYSAK crosses Luzon; it is however increasingly likely that the storm will slow down as it weakens and is affected by an arriving surge of northeast monsoon.

副熱帶高壓脊短暫增強，預料美莎克將於未來 24 小時向偏西移動。隨後副高將轉回西北-東南向，這將令美莎克回復其西北偏西或西北之路徑。各模式對於美莎克橫過菲律賓後的路徑出現分歧，但受風暴減弱及東北季候風的影響，美莎克的移速較可能會下降。

Current T-number 現時的 T 號碼: T4.5/5.0/W1.0/24 HRS

MAYSAK's eye became shallow but the storm is still maintaining a very tight structure. Higher shear, lower ocean heat content and dry air intrusion will cause the storm to weaken steadily prior to its projected landfall at Luzon. Conditions in South China Sea are hostile; MAYSAK is expected to weaken very rapidly as it crosses the Sea, and should degenerate into an area of low pressure before it reaches southern Chinese coast.

美莎克的風眼變淺，但風暴結構仍非常緊密。受較高垂直風切變、較低海洋熱含量及乾空氣入侵等因素影響，美莎克會於登陸呂宋前穩定減弱。由於南海的大氣環境惡劣，美莎克橫過南海時將快速減弱，預計會於到達華南沿岸前減弱為低壓區。

A surge of northeast monsoon is due to arrive early next week, at about the same time when MAYSAK enters the South China Sea. Expect windy conditions and some rain, but MAYSAK should weaken quickly enough not to cause major disruption to the territory.

於美莎克進入南海的同時，預料一股東北季候風將於下周初到達，屆時風勢將轉強並會有雨。由於預測美莎克減弱速度頗快，它應該不會對香港構成嚴重影響。

2015/04/04 (Sat 六), afternoon 下午 (or earlier 或更早)

MAYSAK continues to move WNW, and has weakened into category 4. At 8 am, MAYSAK was centred about 1430 km (770 NM) E of Manila.

美莎克繼續向西北偏西移動，並減弱為四級颱風。在上午 8 時， 美莎克集結在馬尼拉以東約 1430 公里 (770 海里)。

MAYSAK is the 71st name in the tropical cyclone name list. It was contributed by Cambodia, and is a kind of tree. This name was used in 2002 and 2008.

美莎克為熱帶氣旋名稱列表中第 71 個名字，由柬埔寨提供，為一種樹木的名稱。此名曾於 2002 及 2008 年使用。

MAYSAK will move WNW along the southwestern periphery of the subtropical ridge in the next 24 hours, followed by a westward deflection as the ridge strengthens. It is expected to maintain a general WNW track thereafter, but there is substantial uncertainty among model forecasts stemming from the differences in the prediction of the ridge's strength as well as MAYSAK's intensity after passing the Philippines.

美莎克將於未來 24 小時沿副熱帶高壓脊西南部向西北偏西移動。預料該脊將於其後稍為增強，美莎克屆時將轉西移。預測美莎克之後將向西北偏西移動，但由於美莎克橫過菲律賓後的強度及副高強度之不確定性較大，各模式對美莎克的路徑預測出現分歧。

Current T-number 現時的 T 號碼: T5.5/6.0/W1.5/24 HRS

MAYSAK weakened substantially last night as its eye shrunk in size and eyewall cloud top temperatures continued to rise. MAYSAK is entering a region with higher shear and lower ocean heat content, and will weaken steadily prior to its projected landfall at Luzon. Conditions in South China Sea are hostile; MAYSAK is expected to weaken very rapidly as it crosses the Sea.

美莎克昨晚風眼縮小，眼牆雲頂溫度上升，強度明顯減弱。風暴正進入較高垂直風切變及較低海洋熱含量的區域，預料會於登陸呂宋前穩定減弱。由於南海的大氣環境惡劣，美莎克橫過南海時將快速減弱。

No threat to Hong Kong is expected within the next 72 hours.

預料美莎克於未來的 72 小時將不會對香港構成影響。

2015/04/03 (Fri 五), afternoon 下午 (or earlier 或更早)

MAYSAK intensified further into a category 5 super typhoon yesterday. At 8 am, MAYSAK was centred about 140 km (75 NM) NNW of Yap.

美莎克昨日繼續增強為五級超級颱風。在上午 8 時， 美莎克集結在雅蒲島西北偏北約 140 公里 (75 海里)。

MAYSAK is the 71st name in the tropical cyclone name list. It was contributed by Cambodia, and is a kind of tree. This name was used in 2002 and 2008.

美莎克為熱帶氣旋名稱列表中第 71 個名字，由柬埔寨提供，為一種樹木的名稱。此名曾於 2002 及 2008 年使用。

MAYSAK will move WNW along the southwestern periphery of the subtropical ridge in the next 48 hours, followed by a westward deflection as the ridge strengthens. It is expected to maintain a general WNW track in the later taus, though there is substantial uncertainty to this.

美莎克將於未來 48 小時沿副熱帶高壓脊西南部向西北偏西移動。預料該脊將於其後稍為增強，美莎克屆時將轉西移。長遠預測美莎克將於後期向西北偏西移動，但其不確定性較大。

Current T-number 現時的 T 號碼: T7.0/7.0/D0.5/24 HRS

MAYSAK's eyewall cloud top temperatures decreased further yesterday, but is showing signs of warming today. The JMA yesterday estimated MAYSAK's pressure at 905 hPa, making MAYSAK the strongest tropical cyclone in March since reliable records began (in NW Pacific). MAYSAK is expected to weaken soon as sea temperatures decrease; conditions near the Philippines are even worse which should accelerate its weakening.

美莎克的眼牆雲頂溫度昨日進一步下降，但今天稍為變暖。日本氣象廳昨日估計美莎克的中心氣壓達 905 百帕，這使風暴成為有可靠紀錄以來西北太平洋三月最強的颱風。隨著海溫下降，預料美莎克將於不久後開始減弱。靠近菲律賓一帶的大氣環境更差，預計屆時美莎克減弱的速度會加快。

No threat to Hong Kong is expected within the next 72 hours.

預料美莎克於未來的 72 小時將不會對香港構成影響。

2015/04/02 (Thu 四), afternoon 下午 (or earlier 或更早)

MAYSAK intensified rapidly into a category 4 typhoon. At 8 am, MAYSAK was centred about 480 km (260 NM) E of Yap.

美莎克快速增強為四級颱風。在上午 8 時， 美莎克集結在雅蒲島以東約 480 公里 (260 海里)。

MAYSAK is the 71st name in the tropical cyclone name list. It was contributed by Cambodia, and is a kind of tree. This name was used in 2002 and 2008.

美莎克為熱帶氣旋名稱列表中第 71 個名字，由柬埔寨提供，為一種樹木的名稱。此名曾於 2002 及 2008 年使用。

As the subtropical ridge weakens, MAYSAK will move WNW in the next 72 hours. The ridge is expected to build back after t+72; MAYSAK should turn west again at that time.

隨著副熱帶高壓脊減弱，美莎克將於未來 72 小時向西北偏西移動。預料該脊將於 72 小時後再次增強，美莎克屆時將再度西移。

Current T-number 現時的 T 號碼: T6.5/6.5/D2.0/24 HRS

MAYSAK deepened significantly over the past 24 hours as a thick central dense overcast becomes visible, with a clear eye embedded in its centre. The storm is expected to reach category 5 tonight as it nears Yap, but will not be able to maintain such intensity as it encounters lower sea temperatures and stronger vertical wind shear at higher latitudes.

美莎克於過去 24 小時大幅增強，它發展出一深厚中心密集雲區，內嵌風眼清晰可見。預料風暴將於今晚靠近雅蒲島時增強至五級強度，但由於較高緯度的海溫稍低及垂直風切變較強，它將於不久後開始減弱。

No threat to Hong Kong is expected within the next 72 hours.

預料美莎克於未來的 72 小時將不會對香港構成影響。

2015/04/01 (Wed 三), afternoon 下午 (or earlier 或更早)

MAYSAK is travelling westward steadily. At 8 am, MAYSAK was centred about 990 km (540 NM) E of Yap.

美莎克穩定向西移動。在上午 8 時， 美莎克集結在雅蒲島以東約 990 公里 (540 海里)。

MAYSAK is the 71st name in the tropical cyclone name list. It was contributed by Cambodia, and is a kind of tree. This name was used in 2002 and 2008.

美莎克為熱帶氣旋名稱列表中第 71 個名字，由柬埔寨提供，為一種樹木的名稱。此名曾於 2002 及 2008 年使用。

MAYSAK will move west along the southern periphery of the subtropical ridge. The ridge is expected to weaken slightly two days later, causing the storm to track WNW. The weakening is believed to be temporary, however, and models are calling for another westward deflection as the storm nears the Philippines this weekend.

美莎克將沿副熱帶高壓脊南部向西移動。預料副高會於兩日後稍為減弱，令風暴向西北偏西移動。可是，數值預報模式顯示副高將於本周後期再度增強，美莎克的移向將可能於其靠近菲律賓時再度轉西。

Current T-number 現時的 T 號碼: T4.5/4.5/D0.5/24 HRS

MAYSAK's intensification slowed down yesterday, but it appears to be developing an eye this morning. The storm is expected to intensify steadily in warm seas with low vertical wind shear, becoming a significant typhoon as it nears Yap two days later. Deterioration of the atmospheric conditions will cause the storm to weaken thereafter.

美莎克的增強速度於昨天放緩，但風暴今早似乎正建立風眼。預料美莎克會於溫暖海域及低垂直風切變的環境下穩定增強，並以較強颱風強度於兩天後靠近雅蒲島。隨後大氣環境將轉差，美莎克將會減弱。

No threat to Hong Kong is expected within the next 72 hours.

預料美莎克於未來的 72 小時將不會對香港構成影響。

2015/03/31 (Tue 二), afternoon 下午 (or earlier 或更早)

MAYSAK has intensified into a typhoon. At 8 am, MAYSAK was centred about 35 km (20 NM) NNE of Chuuk.

美莎克已增強為颱風。在上午 8 時， 美莎克集結在楚克島東北偏北約 35 公里 (20 海里)。

MAYSAK is the 71st name in the tropical cyclone name list. It was contributed by Cambodia, and is a kind of tree. This name was used in 2002 and 2008.

美莎克為熱帶氣旋名稱列表中第 71 個名字，由柬埔寨提供，為一種樹木的名稱。此名曾於 2002 及 2008 年使用。

MAYSAK will move west along the southern periphery of the subtropical ridge. The ridge is expected to weaken later this week, causing the storm to track increasingly poleward.

美莎克將沿副熱帶高壓脊南部向西移動。預料副高會於本周後期減弱，令美莎克的移向逐漸轉北。

Current T-number 現時的 T 號碼: T4.0/4.0/D1.0/24 HRS

MAYSAK's convections are wrapping tightly around its centre. The storm is expected to intensify steadily in warm seas with low vertical wind shear, becoming a significant typhoon as it nears Yap three days later. Deterioration of the atmospheric conditions will cause the storm to weaken thereafter.

美莎克的對流緊密地繞中心轉動。預料美莎克會於溫暖海域及低垂直風切變的環境下穩定增強，並以較強颱風強度於三天後靠近雅蒲島。隨後大氣環境將轉差，美莎克將會減弱。

No threat to Hong Kong is expected within the next 72 hours.

預料美莎克於未來的 72 小時將不會對香港構成影響。

2015/03/30 (Mon 一), afternoon 下午 (or earlier 或更早)

04W has intensified into a tropical storm, and was named MAYSAK. At 8 am, MAYSAK was centred about 360 km (190 NM) E of Chuuk.

04W 已增強為熱帶風暴，被命名為美莎克。在上午 8 時， 美莎克集結在楚克島以東約 360 公里 (190 海里)。

MAYSAK is the 71st name in the tropical cyclone name list. It was contributed by Cambodia, and is a kind of tree. This name was used in 2002 and 2008.

美莎克為熱帶氣旋名稱列表中第 71 個名字，由柬埔寨提供，為一種樹木的名稱。此名曾於 2002 及 2008 年使用。

MAYSAK will move west along the southern periphery of the subtropical ridge. The ridge is expected to weaken later next week, causing the storm to track increasingly poleward.

美莎克將沿副熱帶高壓脊南部向西移動。預料副高會於下周後期減弱，令美莎克的移向逐漸轉北。

Current T-number 現時的 T 號碼: T3.0/3.0/D1.5/24 HRS

MAYSAK has been strengthening at a rate faster than climatological average, and appears to be developing a central dense overcast. It is expected to intensify steadily in warm seas with low vertical wind shear, becoming a significant typhoon next week.

美莎克增強速度比氣候平均值快，一中心密集雲區似乎正在發展。預料美莎克會於溫暖海域及低垂直風切變的環境下穩定增強，並於下周成為一強勁颱風。

No threat to Hong Kong is expected within the next 72 hours.

預料美莎克於未來的 72 小時將不會對香港構成影響。

2015/03/29 (Sun 日), afternoon 下午 (or earlier 或更早)

A disturbance intensified into tropical depression 04W today. At 8 am, 04W was centred about 670 km (360 NM) E of Chuuk.

一擾動今早增強為熱帶低氣壓 04W。在上午 8 時， 04W 集結在楚克島以東約 670 公里 (360 海里)。

N/A 不適用

A broad subtropical ridge north of 04W will lead the storm towards the west in the next 72 hours.

04W 以北的廣闊副熱帶高壓脊將帶領風暴於未來 72 小時向偏西移動。

Current T-number 現時的 T 號碼: T1.5/1.5/INT OBS

04W has a well-defined low-level circulation centre. It is expected to intensify steadily in warm seas with low to moderate vertical wind shear.

04W 的低層環流中心清晰，預料會於溫暖海域及低至中等垂直風切變的環境下穩定增強。

No threat to Hong Kong is expected within the next 72 hours.

預料 04W 於未來的 72 小時將不會對香港構成影響。

2015/03/28 (Sat 六), afternoon 下午 (or earlier 或更早)