Tropical disturbance 99W intensified into a tropical depression (23W) early today and strengthened into a tropical storm this morning. The JMA named it BAVI at 14 HKT. At 14 HKT, BAVI was centred about 760 km (410 NM) ENE of Iwo Jima.
BAVI is now crossing the axis of a subtropical ridge anchored E of it. It is expected that NNE to NE movement will follow as it moves towards the northwestern periphery of the subtropical ridge. It will track at an increasing speed as the interaction with the westerlies increases later in the forecast period.
Current T-number: T2.5/2.5/INT OBS
BAVI will benefit from improved divergence associated with the arriving trough and intensify in the next 24 hours. Extratropical transformation is very likely after t+24 as it enters baroclinic zone.
現時的 T 號碼: T2.5/2.5/INT OBS
巴威將受惠於西風槽前之良好幅散，於未來 24 小時增強。24 小時後，隨著巴威進入斜壓環境，它將會逐漸轉化為溫帶氣旋。
Effects on Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
巴威於未來的 72 小時將不會對香港構成任何影響。
Next Update 下次更新
23 HKT, 2008/10/20 (or earlier 或更早)
Probabilities of TC Signals from HKO 香港天文台(已)發出熱帶氣旋警告信號的機率