KROSA made landfall at northern Taiwan yesterday. It has then moved N, gradually approaching Zhejiang. At 14 HKT, KROSA was centred 500 km (270 NM) S of Shanghai.

羅莎昨日登陸台灣北部並轉向北移動，現在靠近浙江沿岸。在 14 HKT，羅莎集結在上海之南約 500 公里 (270 海里)。

The ridge to the east of KROSA is retreating gradually, and KROSA will be able to recurve in 24 hours' time.

羅莎東部的副熱帶高壓脊將會逐漸東退，允許羅莎稍後向東北移動。

Current T-number: T4.0/4.5/W2.5/24 HRS
As KROSA takes the poleward turn, the entrainment of drier air and higher vertical wind shear will cause KROSA to weaken further.

現時的 T 號碼: T4.0/4.5/W2.5/24 HRS
由於受到轉強的垂直風切變及較乾的空氣影響，羅莎將進一步減弱。

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

羅莎於未來的72小時將不會對香港構成任何影響。

19 HKT, 2007/10/08 (or earlier 或更早)

KROSA turned from NW to WNW last night and is now approaching Taiwan. At 14 HKT, KROSA was centred 100 km (50 NM) SE of Taipei.

羅莎昨晚轉為向西北偏西移動並逐漸靠近台灣。在 14 HKT，羅莎集結在台北之東南約 100 公里 (50 海里)。

A weakness is about to form between the ridges, which allows the system to recurve. The initial speed will be low as KROSA situates in a pressure col.

預料一道西風槽將會在副熱帶高壓脊造成弱點，羅莎將會逐漸轉向東北移動。初時由於羅莎處於鞍場之中，它將會於未來 24 小時緩慢向偏北方向移動。

Current T-number: T6.5/7.0/W0.5/24 HRS
KROSA is expected to lose strength as it approaches Taiwan, and as it takes the poleward turn the entrainment of drier air and higher vertical wind shear will cause KROSA to weaken further.

現時的 T 號碼: T6.5/7.0/W0.5/24 HRS
預料羅莎將由於登陸台灣而開始減弱，其後由於受到轉強的垂直風切變及較乾的空氣影響，羅莎將進一步減弱。

Haze is expected on the next two days as KROSA nears Taiwan.

羅莎的下沉氣流將於未來兩天為本港帶來煙霞。

19 HKT, 2007/10/07 (or earlier 或更早)

KROSA intensified further in the past 24 hours into a super typhoon, now having a very well-defined eye of about 70 km (40 NM). At 14 HKT, KROSA was centred 570 km (310 NM) SE of Taipei.

羅莎昨晚增強為一超級颱風並有一個約 70 公里 (40 海里) 寬的風眼。在 14 HKT，羅莎集結在台北之東南約 570 公里 (310 海里)。

Steered by a ridge SE of the storm, KROSA will be able to move NW in the next 48 hours. It is expected that a weak mid-latitude trough will develop later in the forecast period and creates a weakness between the ridges, allowing KROSA to recurve.

受到在羅莎東南面的高壓脊影響，羅莎將於未來 48 向西北移動。預料一道西風槽將會於較後時間形成並對副熱帶高壓脊造成弱點，羅莎將會減慢及向北移動。

Current T-number: T7.0/7.0/D1.0/24 HRS
KROSA has been intensifying in the past 24 hours due to excellent ambient environments. It is forecast that KROSA will be able to maintain its strength before reaching Taiwan, and as it approaches Taiwan (and later on) the entrainment of drier air and higher vertical wind shear will cause KROSA to weaken gradually.

現時的 T 號碼: T7.0/7.0/D1.0/24 HRS
受到良好的大氣環境影響，羅莎於過去 24 小時繼續增強。預料羅莎將可在登陸台灣前維持強度，之後由於受到轉強的垂直風切變及較乾的空氣影響，羅莎將開始減弱。

Haze is expected on the next two days as KROSA nears Taiwan.

羅莎的下沉氣流將於未來兩天為本港帶來煙霞。

19 HKT, 2007/10/06 (or earlier 或更早)

KROSA intensified rapidly in the past 48 hours with a very well-defined eye of about 80 km (45 NM). At 14 HKT, KROSA was centred 870 km (470 NM) SE of Taipei.

羅莎昨晚急速增強並發展出一個約 80 公里 (45 海里) 寬的風眼。在 14 HKT，羅莎集結在台北之東南約 870 公里 (470 海里)。

Steered by a ridge SE of the storm, KROSA will be able to move NW in the next 48 hours. It is expected that a weak mid-latitude trough will develop later in the forecast period and creates a col between the ridges, which allows KROSA to decelerate and move poleward.

受到在羅莎東南面的高壓脊影響，羅莎將於未來 48 向西北移動。預料一道西風槽將會於較後時間形成並對副熱帶高壓脊造成弱點，羅莎會在此鞍形場中減慢及向北移動。

Current T-number: T6.0/6.0/D1.5/24 HRS
KROSA has been intensifying rapidly in the past 24 hours due to excellent ambient environments. It is forecast that KROSA will be able to intensify further in the next 24 hours due to excellent outflow channels. KROSA should weaken before reaching Taiwan as the wind shear rises considerably.

現時的 T 號碼: T6.0/6.0/D1.5/24 HRS
受到良好的大氣環境影響，羅莎於過去 24 小時急速增強。預料羅莎極佳的輻散通道將使它於未來 24 小時稍為增強。之後由於受到轉強的垂直風切變影響，羅莎將開始減弱。

Haze is expected on Saturday as KROSA nears Taiwan.

羅莎的下沉氣流將於星期六為本港帶來煙霞。

19 HKT, 2007/10/05 (or earlier 或更早)

KROSA intensified rapidly in the past 24 hours with a discernible and tight eye formed earlier today. At 14 HKT, KROSA was centred 1200 km (650 NM) SE of Taipei.

羅莎昨晚急速增強並發展出一個漸趨緊密的風眼。在 14 HKT，羅莎集結在台北之東南約 1200 公里 (650 海里)。

As the equatorial anticyclone is weakening, KROSA will be able to move NW in the next 48 - 72 hours. Uncertainties exist as to the motion of KROSA after t+72, with different models persistently predicting different scenarios including landfall at Fujian (ECMWF) and a recurvature (NOGAPS). This bulletin favours more on the NOGAPS solution, but this is subject to change as more data is available afterwards.

赤道反氣旋正在減弱中，而羅莎將可於未來 48 至 72 小時向西北移動。可是，各預報模式對於羅莎在 t+72 以後的路徑存在一定的分歧，而本報將較為支持 NOGAPS 的預測 (氣旋轉向)。

Current T-number: T4.5/4.5/D1.0/24 HRS
KROSA has been intensifying rapidly in the past 24 hours due to excellent ambient environments. It is forecast that KROSA will be able to intensify at slightly higher than the climatological rate in the next 72 hours. The extended forecast period (t+120 - t+144) calls for a slight decrease in strength as sea temperature drops at such latitude.

現時的 T 號碼: T4.5/4.5/D1.0/24 HRS
受到良好的大氣環境影響，羅莎於過去 24 小時急速增強。預料隨著輻散通道繼續轉好，羅莎可望於未來 72 小時以稍高於氣候平均值的速度增強。之後由於海水溫度隨緯度的增加而逐漸變涼，羅莎將稍為減弱。

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

羅莎於未來的72小時將不會對香港構成任何影響。

21 HKT, 2007/10/04 (or earlier 或更早)

91W intensified rapidly in the past 24 hours, reaching severe tropical storm strength today and was named KROSA. At 14 HKT, KROSA was centred 1370 km (740 NM) SE of Taipei.

91W 昨晚急速增強為一強烈熱帶風暴，並被命名為羅莎。在 14 HKT，羅莎集結在台北之東南約 1370 公里 (740 海里)。

KROSA is currently situated in a weak steering environment as the steerings from equatorial anticyclone and the subtropical ridge cancel each other. It is forecast that as the equatorial anticyclone weakens near t+36, KROSA will be able to move NW. Uncertainties exist as to the motion of KROSA after t+72, with different models predicting different scenarios including landfall at Fujian (ECMWF) and a recurvature (NOGAPS). This bulletin favours more on the NOGAPS solution, but this is subject to change as more data is available afterwards.

受到赤道反氣旋及副熱帶高壓脊的共同影響，羅莎於過去 24 小時幾乎停留不動。預料隨著赤道反氣旋於 t+36 減弱，羅莎可向西北移動。可是，各預報模式對於羅莎在 t+72 以後的路徑存在一定的分歧，而本報將較為支持 NOGAPS 的預測 (氣旋轉向)。

Current T-number: T3.5/3.5/D1.5/24 HRS
KROSA has been intensifying rapidly in the past 24 hours due to excellent ambient environments. It is forecast that KROSA will be able to intensify at greater than climatological rate as its ouflows improve further.

現時的 T 號碼: T3.5/3.5/D1.5/24 HRS
受到良好的大氣環境影響，羅莎於過去 24 小時急速增強。預料隨著輻散通道繼續轉好，羅莎可望於未來 96 小時以高於氣候平均值的速度增強。

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

羅莎於未來的72小時將不會對香港構成任何影響。

20 HKT, 2007/10/03 (or earlier 或更早)

HKWW upgraded the disturbance east of the Philippines (91W) into a tropical depression at 14 HKT. At 14 HKT, 91W was centred 1250 km (670 NM) SE of Taipei.

在菲律賓以東的一個擾動 (91W) 已經增強為一熱帶低氣壓。在 14 HKT，91W 集結在台北之東南約 1250 公里 (670 海里)。

91W is currently situated in a weak steering environment. It is forecast that the ridge will be situated slightly north of the system to provide a weak steering to the west through t+48.

91W 正處於弱駛流環境。預料在未來的 48 小時副熱帶高壓脊將處於系統北部，91W 將向偏西方向緩慢移動。

Current T-number: T2.0/2.0/INT OBS
It is forecast that 91W can intensify at a climatological rate as it encounters warm sea surface temperatures.

現時的 T 號碼: T2.0/2.0/INT OBS
預料 91W 可以在溫暖的海水中以氣候平均值增強。

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

91W 於未來的72小時將不會對香港構成任何影響。

20 HKT, 2007/10/02 (or earlier 或更早)