IN-FA is the 91st name in the tropical cyclone name list. It was contributed by Macau, meaning fireworks. This name replaces PARMA which caused extensive damage in the Philippines in 2009.
IN-FA has weakened into a severe tropical storm. At 2 pm, IN-FA was centred about 780 km (420 NM) SW of Iwo Jima.
煙花已減弱為強烈熱帶風暴。在下午 2 時，煙花集結在硫磺島西南約 780 公里 (420 海里)。
TC
Naming 氣旋命名
IN-FA is the 91st name in the tropical cyclone name list. It was contributed by Macau, meaning fireworks. This name replaces PARMA which caused extensive damage in the Philippines in 2009.
IN-FA is now situated in the northwestern periphery of the subtropical ridge, and is expected to move NE in the next 36 hours.
煙花正處於副熱帶高壓脊西北部，預料將於未來 36 小時向東北移動。
Intensity
Analysis 強度分析
Current T-number 現時的 T 號碼: T3.0/3.5/W1.0/24 HRS
IN-FA's convections are gradually thinning out. The storm is expected to weaken in unfavourable environment, and extratropical transition should be complete between t+24 and t+36.
IN-FA has weakened into a category 1 typhoon. At 2 pm, IN-FA was centred about 1100 km (590 NM) SW of Iwo Jima.
煙花已減弱為一級颱風。在下午 2 時，煙花集結在硫磺島西南約 1100 公里 (590 海里)。
TC
Naming 氣旋命名
IN-FA is the 91st name in the tropical cyclone name list. It was contributed by Macau, meaning fireworks. This name replaces PARMA which caused extensive damage in the Philippines in 2009.
IN-FA is moving NE in a region of weak steering influence. It is however moving faster than previously projected, and the forecast track speed has been adjusted accordingly. IN-FA is expected to move NE and accelerate later along the northwestern periphery of the subtropical ridge.
IN-FA has entered a region of high vertical wind shear and the upper-level convections are being sheared away from the centre. Coupled with lower sea temperatures, IN-FA will weaken gradually. Due to the speed adjustment, it is now expected to complete extratropical transition near t+48.
IN-FA is the 91st name in the tropical cyclone name list. It was contributed by Macau, meaning fireworks. This name replaces PARMA which caused extensive damage in the Philippines in 2009.
There is a break in the subtropical ridge, along which IN-FA will traverse in the next 48 hours. Because of competing ridge influence either side of the storm, IN-FA is expected to move slowly while it moves north. It is expected to turn northeast near t+48 and accelerate along the northwestern periphery of the subtropical ridge to its east.
IN-FA's core remains intact and the storm's intensity has been rather stable over the past 24 hours. The storm will weaken gradually as it turns north due to a combination of higher vertical wind shear, lower sea temperatures and intrusion of drier air. Extratropical transition is expected by t+96.
IN-FA is the 91st name in the tropical cyclone name list. It was contributed by Macau, meaning fireworks. This name replaces PARMA which caused extensive damage in the Philippines in 2009.
The western edge of the subtropical ridge is weakening. IN-FA is expected to move WNW in the next 12 to 24 hours, and will then decelerate rapidly as it turns north along the western periphery of the ridge. Numerical models come into better agreement in depicting a recurving scenario, but there is substantial uncertainty to when IN-FA will accelerate again towards the northeast.
IN-FA's eye has collapsed and the storm has weakened substantially over the past 24 hours. The storm will weaken gradually as it turns north due to a combination of higher vertical wind shear, lower sea temperatures and intrusion of drier air. Extratropical transition is expected by t+120.
IN-FA is the 91st name in the tropical cyclone name list. It was contributed by Macau, meaning fireworks. This name replaces PARMA which caused extensive damage in the Philippines in 2009.
IN-FA is expected to move WNW along the southern periphery of the subtropical ridge over the next 24 to 36 hours. The ridge will weaken ahead of a passing mid-latitude trough, and the storm will round the ridge along its western side after t+48. However, there is a slight possibility that IN-FA will stagnate before recurving upon the arrival of a strong northerly surge next week.
Current T-number 現時的 T 號碼: T5.5/6.0/D0.5/24 HRS W0.5/06 HRS
IN-FA developed a small but rather clear eye last night, but it has become cloud-filled over the past 6 hours. The storm is expected to maintain intensity or strengthen slightly over the past 24 hours, after which a weakening trend should follow. The storm will weaken more rapidly as it turns north due to a combination of higher vertical wind shear, lower sea temperatures and intrusion of drier air.
IN-FA has intensified into a typhoon. At 2 pm, IN-FA was centred about 450 km (240 NM) SE of Guam.
煙花已增強為颱風。在下午 2 時，煙花集結在關島東南約 450 公里 (240 海里)。
TC
Naming 氣旋命名
IN-FA is the 91st name in the tropical cyclone name list. It was contributed by Macau, meaning fireworks. This name replaces PARMA which caused extensive damage in the Philippines in 2009.
IN-FA is expected to move WNW along the southern periphery of the subtropical ridge over the next 48 hours. The ridge will weaken ahead of a passing mid-latitude trough, and the storm will round the ridge along its western side after t+72.
IN-FA has developed a small central dense overcast. The storm is expected to intensify within the next 48 hours in warm seas with low vertical wind shear and decent outflow channels. As IN-FA moves north, unfavourable conditions will kick in and the storm should weaken gradually.
IN-FA is the 91st name in the tropical cyclone name list. It was contributed by Macau, meaning fireworks. This name replaces PARMA which caused extensive damage in the Philippines in 2009.
As IN-FA reaches the base of the subtropical ridge, its track should turn equatorward over the next 48 hours. The storm will reach the western periphery of the ridge near t+72, and will turn increasingly poleward afterwards.
IN-FA's formative eye collapsed yesterday and its core convections remain small in size. The storm is still expected to intensify within the next 72 hours in warm seas with low vertical wind shear and decent outflow channels.
IN-FA is the 91st name in the tropical cyclone name list. It was contributed by Macau, meaning fireworks. This name replaces PARMA which caused extensive damage in the Philippines in 2009.
The subtropical ridge north of IN-FA is expected to weaken slightly in the next 48 hours, allowing the storm to move NW during this period. As IN-FA reaches the base of the ridge, it should turn WNW again near t+48. The storm will move increasingly poleward towards the end of the forecast period as it reaches the western periphery of the ridge.
IN-FA's coverage has diminished but convections are getting tighter. As vertical wind shear remains low and divergence remains favourable, IN-FA is expected to intensify steadily in the next 72 to 96 hours.
Tropical disturbance 95W intensified into tropical depression 27W this morning. It strengthened further into a tropical storm in the afternoon. At 2 pm, 27W was centred about 1110 km (600 NM) ESE of Chuuk.
27W is moving west along the southern periphery of a subtropical ridge. The ridge is expected to weaken slightly in the next 72 hours, allowing the storm to move WNW to NW during this period. As 27W reaches the base of the ridge, it should turn west again near t+72.
27W is showing decent banding signature. The storm is expected to intensify gradually during the next 120 hours in a region with favourable divergence and low vertical wind shear.
27W 的旋轉性頗佳，預料將於有利的輻散及低垂直風切變環境下於未來 120 小時逐漸增強。
Effects on
Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
預料 27W 於未來的 72 小時將不會對香港構成影響。
Next Update
下次更新
2015/11/18 (Wed 三), afternoon 下午 (or earlier 或更早)
Other Images
其他圖像
JTWC Track 聯合颱風警報中心路徑圖
JMA Track 日本氣象廳路徑圖
HKO Satellite 香港天文台衛星圖
HKO Track 香港天文台路徑圖
Probabilities
of TC Signals from HKO within the next 3 days 未來三天香港天文台發出 / 取消熱帶氣旋警告信號的機率
Active Tropical Cyclone(s) 正活躍之熱帶氣旋
