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Somerset Squall

Tropical Storm Yutu

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A cold core low in the far east of the West Pacific basin at high lattitude has aquired tropical characteristics and been upgraded to Tropical Storm Yutu, with winds of 35kts. The storm has some modest convection to the south of the mainly exposed LLCC. Yutu is not expected to strengthen tropically, and will soon become extratropical as it races northeastwards. Intetestingly, Yutu will move across the international dateline into the Central Pacific. It has been some time since a tropical cyclone has crossed the dateline from west to east. Seems to be a year for dateline crossing storms (Pewa, Unala and 03C crossed it east to west last month).

Edited by Somerset Squall

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Yutu has changed little since last night. The storm remains a 35kt tropical storm, but has no convection over the LLCC and just retains a small area of thunderstorms in the southern quadrant. Yutu is now forecast to dissipate before reaching the Central Pacific.

 

This image shows Yutu's unusually high lattitude (it is the easternmost of the two systems):

 

Posted Image

Edited by Somerset Squall
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Convection has increased in the southern quadrant of Yutu this morning, but the LLCC remains exposed. Intensity remains at 35kts according to JMA. Yutu is trapped in weak steering and has started to loop back to the southwest. High shear is forecast to dissipate Yutu over the next 24 hours, over the marginal sea temps of around 25C.

 

Posted Image

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Another system in the area, Tropical Storm Yutu, is unlikely to threaten Taiwan, forecasters said. At noon Sunday, Yutu was located some 5,300 km east of Taipei and moving east northeast at a speed of 7 kph, according to the weather bureau

 

http://focustaiwan.tw/news/asoc/201309010018.aspx

 

Edited by Coast
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The convection in the southern quadrant of Yutu has dissipated. In addition, the LLC is distorting under high shear. With continued strong shear expected, Yutu will probably die overnight.

 

 

post-1820-0-84826200-1378247958_thumb.jp

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Yutu has degenerated into a remnant low, and the system remains completely devoid of any convection. The remnant low is moving southwards, into warmer water, but the air is very dry and shear still moderate to high. Therefore, even though we cannot rule out regeneration, it is not considered likely.

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