KROVANH is the 85th name in the tropical cyclone name list and was contributed by Cambodia. It is the name of a type of trees. This name was last used in 2003; the storm associated with this name necessitated the #3 Strong Wind Signal.
KROVANH recurved today. At 14 HKT, KROVANH was centred about 140 km (75 NM) SE of Tokyo.
科羅旺已於今日開始轉向。在 14 HKT，科羅旺集結在東京東南約 140 公里 (750 海里)。
TC Naming 氣旋命名
KROVANH is the 85th name in the tropical cyclone name list and was contributed by Cambodia. It is the name of a type of trees. This name was last used in 2003; the storm associated with this name necessitated the #3 Strong Wind Signal.
KROVANH is expected to travel NNE to NE in the northwestern periphery of the subtropical ridge.
科羅旺將沿副熱帶高壓脊西北部向東北至東北偏北移動。
Intensity Analysis 強度分析
Current T-number: T4.0/4.0/S0.0/24 HRS
KROVANH is expected to weaken slightly as it passes east of Japan. Transformation into an extratropical cyclone should be complete in two days' time.
現時的 T 號碼: T4.0/4.0/S0.0/24 HRS 預測科羅旺將於日本東部海域橫過時稍為減弱，並於 48 小時內轉化為溫帶氣旋。
Effects on Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
科羅旺於未來的 72 小時將不會對香港構成任何影響。
Next Update 下次更新
19 HKT, 2009/09/01 (or earlier 或更早)
Probabilities of TC Signals from HKO 香港天文台 (已) 發出 / 取消熱帶氣旋警告信號的機率
KROVANH is the 85th name in the tropical cyclone name list and was contributed by Cambodia. It is the name of a type of trees. This name was last used in 2003; the storm associated with this name necessitated the #3 Strong Wind Signal.
The ridge has been stronger than expected and thus steered KROVANH west-northwestward. Nevertheless the ridge is expected to weaken after the approach of a series of mid-latitude troughs and should allow KROVANH to recurve soon.
Current T-number: T4.0/4.0/D0.5/24 HRS
KROVANH is expected to maintain strength before reaching Japan in seas of moderate surface temperatures, after which weakening should follow.
現時的 T 號碼: T4.0/4.0/D0.5/24 HRS 預測科羅旺將於靠近日本時在海水溫度尚可的洋面上維持強度。隨著環境變為惡劣，科羅旺將於橫過副高脊線後減弱。
Effects on Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
科羅旺於未來的 72 小時將不會對香港構成任何影響。
Next Update 下次更新
23 HKT, 2009/08/31 (or earlier 或更早)
Probabilities of TC Signals from HKO 香港天文台 (已) 發出 / 取消熱帶氣旋警告信號的機率
12W has intensified into a severe tropical storm, and was named KROVANH by the JMA. At 20 HKT, KROVANH was centred about 650 km (350 NM) NE of Iwo Jima.
KROVANH is the 85th name in the tropical cyclone name list and was contributed by Cambodia. It is the name of a type of trees. This name was last used in 2003; the storm associated with this name necessitated the #3 Strong Wind Signal.
The forecast philosophy has changed significantly. Latest models gradually converge to the resolution that the ridge will not have time to extend westwards due to the attack of a series of mid-latitude troughs. KROVANH is thus expected to recurve near Japan.
Current T-number: T3.5/3.5/D1.0/24 HRS
Upper level divergence is quite favourable in the vicinity of KROVANH. Coupled with warm seas and low shear, KROVANH should intensify gradually as it nears Japan. Weakening is expected after KROVANH crosses the ridge axis, as shear and water temperatures will become unfavourable.
現時的 T 號碼: T3.5/3.5/D1.0/24 HRS 科羅旺附近的高空輻散良好。配合高水溫和低垂直風切變，科羅旺應可在靠近日本期間增強。隨著環境變為惡劣，科羅旺將於橫過副高脊線後減弱。
Effects on Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
科羅旺於未來的 72 小時將不會對香港構成任何影響。
Next Update 下次更新
23 HKT, 2009/08/30 (or earlier 或更早)
Probabilities of TC Signals from HKO 香港天文台 (已) 發出 / 取消熱帶氣旋警告信號的機率
Tropical disturbance 90W consolidated quickly last night and it has gradually intensified into a tropical storm (12W). At 14 HKT, 12W was centred about 770 km (420 NM) ESE of Iwo Jima.
12W is situated in a weakness between the two ridges east and west of it. The eastern ridge is expected to push 12W northwards. As the trough currently near Korea moves away, the eastern subtropical ridge should extend and allow a more equatorward movement from t+36 onwards.
Current T-number: T2.5/2.5/INT OBS
Upper level divergence is quite favourable in the vicinity of 12W. Coupled with warm seas and low shear, 12W should intensify gradually in the next 2 days.
現時的 T 號碼: T2.5/2.5/INT OBS
12W 附近的高空輻散良好。配合高水溫和低垂直風切變，12W 應可在未來兩天逐漸增強。
Effects on Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
12W 於未來的 72 小時將不會對香港構成任何影響。
Next Update 下次更新
23 HKT, 2009/08/29 (or earlier 或更早)
Probabilities of TC Signals from HKO 香港天文台 (已) 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
