SONCA has transformed into an extratropical cyclone. At 20 HKT, SONCA was centred about 1980 km (1070 NM) E of Sapporo.
桑卡已轉化為溫帶氣旋。在下午 8 時，桑卡集結在札幌以東約 1980 公里 (1070
海里)。
TC
Naming 氣旋命名
SONCA is the 126th name in the tropical cyclone name list. It was contributed by Vietnam, which is a kind of singing bird that lives in mountainous areas. This name was last used in 2005.
SONCA is the 126th name in the tropical cyclone name list. It was contributed by Vietnam, which is a kind of singing bird that lives in mountainous areas. This name was last used in 2005.
SONCA will move ENE in the northwestern periphery of the subtropical ridge.
桑卡將沿副熱帶高壓脊西北部向東北偏東移動。
Intensity
Analysis 強度分析
Current T-number: T4.0/4.5/W0.5/24 HRS
SONCA will weaken in cooler seas and will transform into an extratropical cyclone in baroclinic zone in 36 hours.
現時的 T 號碼: T4.0/4.5/W0.5/24 HRS
桑卡將於較冷海域中減弱，並在斜壓環境下於 36 小時後轉化為溫帶氣旋。
Effects on
Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
桑卡於未來的 72 小時將不會對香港構成任何影響。
Next Update
下次更新
23 HKT, 2011/09/20 (Tue 二) 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 香港天文台 (已) 發出 / 取消熱帶氣旋警告信號的機率
SONCA is the 126th name in the tropical cyclone name list. It was contributed by Vietnam, which is a kind of singing bird that lives in mountainous areas. This name was last used in 2005.
As SONCA reaches the NW periphery of the subtropical ridge, it will turn NE. Forward speed is expected to increase as SONCA becomes embedded within the westerlies.
隨著桑卡到達副熱帶高壓脊西北部，它將轉向東北移動；隨後桑卡併入西風帶，移速會逐漸加快。
Intensity
Analysis 強度分析
Current T-number: T4.5/4.5/D0.5/24 HRS
SONCA's eye is now well-defined. The storm is now reaching its peak intensity; at higher latitudes SONCA will weaken due to cooler seas. Extratropical transition is expected in two days.
現時的 T 號碼: T4.5/4.5/D0.5/24 HRS
桑卡的風眼清晰，並正達其巔峰強度。預料桑卡將於較冷海水影響下而開始減弱，其後於兩天內轉化為溫帶氣旋。
Effects on
Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
桑卡於未來的 72 小時將不會對香港構成任何影響。
Next Update
下次更新
23 HKT, 2011/09/19 (Mon 一) 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 香港天文台 (已) 發出 / 取消熱帶氣旋警告信號的機率
SONCA is the 126th name in the tropical cyclone name list. It was contributed by Vietnam, which is a kind of singing bird that lives in mountainous areas. This name was last used in 2005.
SONCA will recurve along the western periphery of the subtropical ridge.
桑卡將沿副熱帶高壓脊西沿轉向。
Intensity
Analysis 強度分析
Current T-number: T4.0/4.0/D1.0/24 HRS
SONCA's divergence has improved and an eye has developed. The storm is expected to keep its current strength or intensify slightly as it crosses the ridge axis, and will weaken later as cooler waters set in. Extratropical transition should occur in three days' time.
現時的 T 號碼: T4.0/4.0/D1.0/24 HRS
桑卡的輻散轉好，並發展出一風眼。預料桑卡將於橫過副高脊線前維持強度或稍為增強，隨後受冷海水影響而減弱。桑卡將於三天後轉化為溫帶氣旋。
Effects on
Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
桑卡於未來的 72 小時將不會對香港構成任何影響。
Next Update
下次更新
23 HKT, 2011/09/18 (Sun 日) 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 香港天文台 (已) 發出 / 取消熱帶氣旋警告信號的機率
SONCA is moving west steadily. At 20 HKT, SONCA was centred about 900 km (480 NM) E of Iwo Jima.
桑卡正穩定向西移動。在下午 8 時，桑卡集結在硫磺島以東約 900 公里 (480
海里)。
TC
Naming 氣旋命名
SONCA is the 126th name in the tropical cyclone name list. It was contributed by Vietnam, which is a kind of singing bird that lives in mountainous areas. This name was last used in 2005.
The subtropical ridge north of SONCA is weakening. This will allow SONCA to recurve along its western periphery.
桑卡北面的副熱帶高壓脊正減弱，這將令桑卡沿其西部轉向。
Intensity
Analysis 強度分析
Current T-number: T3.0/3.0/D0.5/24 HRS
SONCA's divergence is rather poor. The storm is expected to intensify slowly until reaching the ridge axis, after which the storm will weaken.
現時的 T 號碼: T3.0/3.0/D0.5/24 HRS
桑卡的輻散較差，預料將於橫過副高脊線前緩慢增強，其後開始減弱。
Effects on
Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
桑卡於未來的 72 小時將不會對香港構成任何影響。
Next Update
下次更新
23 HKT, 2011/09/17 (Sat 六) 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 香港天文台 (已) 發出 / 取消熱帶氣旋警告信號的機率
SONCA is the 126th name in the tropical cyclone name list. It was contributed by Vietnam, which is a kind of singing bird that lives in mountainous areas. This name was last used in 2005.
SONCA should turn WNW as it reaches the southern periphery of the subtropical ridge. The ridge will weaken this weekend and SONCA will be able to recurve along its western edge.
隨著桑卡北移至副熱帶高壓脊南端，它將改向西北偏西移動。預料副高將於周末減弱，桑卡將可沿其西部轉向。
Intensity
Analysis 強度分析
Current T-number: T2.5/2.5/D0.5/24 HRS
Shear near SONCA has eased, but sea temperatures are marginal (about 27 degrees). The storm is expected to intensify gradually into a severe tropical storm in two days.
現時的 T 號碼: T2.5/2.5/D0.5/24 HRS
桑卡附近風切減弱，但海溫較低 (約 27 度)。預料桑卡將於未來兩天逐漸增強為強烈熱帶風暴。
Effects on
Hong Kong 對香港的影響
No threat to Hong Kong is expected within the next 72 hours.
桑卡於未來的 72 小時將不會對香港構成任何影響。
Next Update
下次更新
23 HKT, 2011/09/16 (Fri 五) 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 香港天文台 (已) 發出 / 取消熱帶氣旋警告信號的機率
94W is currently moving N/NNE due to an extension of the ridge at low latitudes and the subtropical ridge E of it. The storm is expected to turn west gradually as it reaches the southern periphery of the western extension of the subtropical ridge.
Active Tropical Cyclone(s) 正活躍之熱帶氣旋
