CHOI-WAN has intensified into a typhoon and is moving north quickly. At 8 am, CHOI-WAN was centred about 1030 km (560 NM) ENE of Iwo Jima.

彩雲增強為颱風，並快速向北移動。在上午 8 時，彩雲集結在硫磺島東北偏東約 1030 公里 (560 海里)。

CHOI-WAN is the 88th name in the tropical cyclone name list. It was contributed by Hong Kong, meaning colourful cloud and is also the name of a housing estate. This name was used in 2003 and 2009.

彩雲為熱帶氣旋名稱列表中第 88 個名字，由香港提供，為本港一屋邨的名稱。此名曾於 2003 及 2009 年使用。

CHOI-WAN is expected to move north quickly along the western periphery of the subtropical ridge.

彩雲將沿副熱帶高壓脊西部向北快速移動。

Current T-number 現時的 T 號碼: T4.0/4.0/S0.0/24 HRS

CHOI-WAN has a large, ragged eye. Its intensity is not expected to change much as it moves north and while it undergoes extratropical transition, which should be complete by t+48.

彩雲擁有一大型且不規則的風眼。預料風暴的強度將不會於北移及轉化為溫帶氣旋時有太大變化。彩雲將於 48 小時內演變為溫帶氣旋。

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

預料彩雲於未來的 72 小時將不會對香港構成影響。

2015/10/08 (Thu 四), afternoon 下午 (or earlier 或更早)

CHOI-WAN has decelerated and is about to turn north. At 8 am, CHOI-WAN was centred about 1010 km (540 NM) E of Iwo Jima.

彩雲開始減速，並即將北轉。在上午 8 時，彩雲集結在硫磺島以東約 1010 公里 (540 海里)。

CHOI-WAN is the 88th name in the tropical cyclone name list. It was contributed by Hong Kong, meaning colourful cloud and is also the name of a housing estate. This name was used in 2003 and 2009.

彩雲為熱帶氣旋名稱列表中第 88 個名字，由香港提供，為本港一屋邨的名稱。此名曾於 2003 及 2009 年使用。

The weakness in the subtropical ridge is located north of CHOI-WAN. The storm is expected to turn north in the next 12 hours and then accelerate along the western periphery of the Pacific subtropical ridge.

副熱帶高壓脊的弱點於彩雲以北，預料彩雲會於未來 12 小時北轉，其後沿太平洋副高西部向北加速移動。

Current T-number 現時的 T 號碼: T4.0/4.0/D0.5/24 HRS

CHOI-WAN is wrapping an eye. It is expected to intensify in the next 24 hours in warm seas with decent outflow, and should start to weaken after t+36 as it enters cooler seas. Extratropical transition should be complete by t+72.

彩雲正建立一雲捲風眼，預料將於未來 24 小時在溫暖海域及高空輻散良好的環境中增強。隨著彩雲北移，它將進入較冷海域並於 36 小時後開始減弱。預測彩雲將於 72 小時後轉化為溫帶氣旋。

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

預料彩雲於未來的 72 小時將不會對香港構成影響。

2015/10/07 (Wed 三), afternoon 下午 (or earlier 或更早)

CHOI-WAN is moving westwards quickly. At 8 am, CHOI-WAN was centred about 1400 km (760 NM) ESE of Iwo Jima.

彩雲正以高速西移。在上午 8 時，彩雲集結在硫磺島東南偏東約 1400 公里 (760 海里)。

CHOI-WAN is the 88th name in the tropical cyclone name list. It was contributed by Hong Kong, meaning colourful cloud and is also the name of a housing estate. This name was used in 2003 and 2009.

彩雲為熱帶氣旋名稱列表中第 88 個名字，由香港提供，為本港一屋邨的名稱。此名曾於 2003 及 2009 年使用。

The subtropical ridge is weakening and a break is evident near 150°E. As a result, CHOI-WAN is expected to turn north near t+24. The storm is forecast to accelerate to the north thereafter due to the dominance of the subtropical ridge to its east.

副熱帶高壓脊有所減弱，並於東經 150 度附近出現弱點，預料彩雲將於 24 小時後轉向北移。由於屆時副高仍覆蓋彩雲以東，受其影響預料彩雲會向北加速。

Current T-number 現時的 T 號碼: T3.5/3.5/D0.5/24 HRS

CHOI-WAN is expected to intensify in the next 36 hours in warm seas with decent divergence aloft. As the storm moves further north, it will enter cooler seas and will start to weaken near t+48. Extratropical transition should start by t+72 and be complete by t+96.

預料彩雲將於未來 36 小時在溫暖海域及高空輻散良好的環境中增強。隨著彩雲北移，它將進入較冷海域並於 48 小時後開始減弱。預測彩雲會於 72 小時後開始溫帶氣旋轉化，並於 96 小時後完成。

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

預料彩雲於未來的 72 小時將不會對香港構成影響。

2015/10/06 (Tue 二), afternoon 下午 (or earlier 或更早)

CHOI-WAN has intensified into a severe tropical storm. At 8 am, CHOI-WAN was centred about 630 km (340 NM) W of Wake Island.

彩雲已增強為強烈熱帶風暴。在上午 8 時，彩雲集結在威克島以西約 630 公里 (340 海里)。

CHOI-WAN is the 88th name in the tropical cyclone name list. It was contributed by Hong Kong, meaning colourful cloud and is also the name of a housing estate. This name was used in 2003 and 2009.

彩雲為熱帶氣旋名稱列表中第 88 個名字，由香港提供，為本港一屋邨的名稱。此名曾於 2003 及 2009 年使用。

CHOI-WAN will move WNW quickly along the southern periphery of the subtropical ridge in the next 36 hours. The ridge will weaken at that time, allowing CHOI-WAN to turn sharply to the north near t+48. The storm is forecast to accelerate to the north thereafter due to the dominance of the subtropical ridge to its east.

彩雲將於未來 36 小時沿副熱帶高壓脊南部向西北偏西快速移動，隨後該脊減弱，令彩雲於 48 小時後急轉北移。由於屆時副高仍覆蓋彩雲以東，受其影響預料彩雲會向北加速。

Current T-number 現時的 T 號碼: T3.0/3.0/D0.5/24 HRS

CHOI-WAN is gradually intensifying in warm seas. It is expected to intensify until t+72, after which it will enter cooler seas and will weaken gradually. Extratropical transition should start by t+96 and be complete by t+120.

彩雲正於溫暖海域中逐漸增強。預料彩雲將於未來 72 小時繼續增強，其後由於風暴進入較冷海域，它將逐漸減弱。預測彩雲會於 96 小時後開始溫帶氣旋轉化，並於 120 小時後完成。

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

預料彩雲於未來的 72 小時將不會對香港構成影響。

2015/10/05 (Mon 一), afternoon 下午 (or earlier 或更早)

CHOI-WAN has intensified into a tropical storm; the JTWC assigned it the storm number 23W. At 8 am, CHOI-WAN was centred about 50 km (25 NM) SW of Wake Island.

彩雲已增強為熱帶風暴，而聯合颱風警報中心則予其風暴編號 23W。在上午 8 時，彩雲集結在威克島西南約 50 公里 (25 海里)。

CHOI-WAN is the 88th name in the tropical cyclone name list. It was contributed by Hong Kong, meaning colourful cloud and is also the name of a housing estate. This name was used in 2003 and 2009.

彩雲為熱帶氣旋名稱列表中第 88 個名字，由香港提供，為本港一屋邨的名稱。此名曾於 2003 及 2009 年使用。

The subtropical ridge north of CHOI-WAN has strengthened over the past 12 hours and has filled the weakness. The storm is now accelerating to the WNW, and such motion is expected to continue until t+72. The ridge will weaken at that time, allowing CHOI-WAN to turn sharply to the north.

彩雲以北的副熱帶高壓脊於過去 12 小時增強並填補弱點，風暴開始向西北偏西加速，預料此路徑將於未來 72 小時維持。72 小時後副高將減弱，令彩雲急轉偏北移動。

Current T-number 現時的 T 號碼: T2.5/2.5/D1.0/18 HRS

CHOI-WAN's convections consolidated over the past 18 hours. The storm will intensify gradually in the next 72 hours in warm seas. As outflow improves, more substantial development is expected near t+72. The storm will start to weaken after t+96 as sea temperatures decrease.

彩雲的對流於過去 18 小時有所整合，預料風暴會於未來 72 小時於溫暖海域中增強。隨著輻散改善，預計彩雲的發展速度可於約 72 小時後加快。風暴北轉後將進入較冷海域，預計將於 96 小時後開始減弱。

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

預料彩雲於未來的 72 小時將不會對香港構成影響。

2015/10/04 (Sun 日), afternoon 下午 (or earlier 或更早)

Tropical disturbance 99W has intensified into a tropical depression. The JMA upgraded it into a tropical storm and named it CHOI-WAN. At 2 pm, CHOI-WAN was centred about 80 km (40 NM) S of Wake Island.

熱帶擾動 99W 已增強為熱帶低氣壓，而日本氣象廳則視其為熱帶風暴，並命名為彩雲。在下午 2 時，彩雲集結在威克島以南約 80 公里 (40 海里)。

CHOI-WAN is the 88th name in the tropical cyclone name list. It was contributed by Hong Kong, meaning colourful cloud and is also the name of a housing estate. This name was used in 2003 and 2009.

彩雲為熱帶氣旋名稱列表中第 88 個名字，由香港提供，為本港一屋邨的名稱。此名曾於 2003 及 2009 年使用。

There is a shallow break in the subtropical ridge north of CHOI-WAN. The storm is expected to move NW in the short run. As the ridge strengthens and fills the break, CHOI-WAN will accelerate to the WNW along its southern periphery through t+72.

彩雲以北的副熱帶高壓脊有一淺弱點，預料風暴會於短期內向西北移動。隨著該脊增強並填埔弱點，彩雲將於餘下預測時間沿副高南部向西北偏西加速移動。

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

CHOI-WAN is a relatively large system and its convections are restricted to its periphery. Intensification is expected to be slow initially. As the storm better organizes itself and enters a region with weaker vertical wind shear, more development is expected beyond t+36.

彩雲尺度較大，其對流局限於風暴周邊，預料初時增強較為緩慢。隨著風暴逐步整合及進入垂直風切變較低的海域，預料它的發展速度可於 36 小時後加快。

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

預料彩雲於未來的 72 小時將不會對香港構成影響。

2015/10/03 (Sat 六), afternoon 下午 (or earlier 或更早)