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Tropical Storm Sanvu (03W) Expected to Become Typhoon by Thursday

16.1N 140.8E

May 23rd, 2012 Category: Tropical Storms

Tropical Storm Sanvu (03W) - May 23rd, 2012

Enhanced image

Track of Tropical Storm Sanvu (03W) - May 23rd, 2012 © Univ. of Wisconsin

Track of TS 03W

On May 17, a disturbance associated with a low presure area, and the ITCZ formed southeast of Guam. Late on May 20, the JTWC issued a TCFA on the system because of improving equator-ward outflow. Early on May 21, the JMA upgraded the low-pressure area to a tropical depression, and the JTWC also upgraded the system to a tropical depression later.

Early on May 22, the JMA upgraded the system to a tropical storm and named it Sanvu, as the tropical depression intensified even as it moved northwestward away from coastal waters of the Marianas.

As of 5pm yesterday, Tropical Storm Sanvu was still churning northwestward at 12 miles per hour with maximum sustained winds near 85 km/hr (45 knots) with higher gusts. At that time, Sanvu’s center was 130 miles west-northwest of Guam, 155 miles west of Rota, 190 miles west-southwest of Tinian, and 200 miles southwest of Saipan. Tropical Storm Force Winds (62-117 km/hr) extend outward up to 185 kilometers (100 nautical miles) from the center. Sanvu is an average-sized tropical cyclone with a diameter of 480 kilometers (260 nautical miles).

A tropical storm warning at that time was still in effect for Guam and Rota, while a tropical storm watch was also still in effect for Tinian and Saipan. The storm brought numerous showers and isolated thunderstorms in the morning until last night, Tuesday. NWS said that scattered showers and isolated thunderstorms will linger into Wednesday night in the region.

Sanvu is expected to continue moving NW for the next 12 to 24 hours, before turning more northerly on Friday and recurving NNE to NE-ward on Saturday. On the forecast track, the core of Sanvu will pass very close to Iwo To by early Saturday morning. The system is forecast to continue intensifying and will likely become a Typhoon on Thursday.

Tropical Depression Linfa (03W) Expected to Dissipate

23.5N 119.0E

June 22nd, 2009 Category: Tropical Cyclones

Track of Tropical Depression Linfa (03W) © Univ. of Wisconsin

Track of Tropical Depression Linfa (03W)

TD03W - June 21st, 2009 © JTWC

TD03W - June 21st, 2009

Tropical Depression 03W (Linfa), located approximately 400 nautical miles west of Okinawa, has tracked northeastward at 13 knots over the past six hours. At 22/0600z the system had crossed the Chinese Coast into the East China Sea. Maximum significant wave height is 10 feet.

Animated multispectral satellite imagery shows the system to be completely lacking in deep convection, although the low level circulation center (LLCC) remains well defined. Upper level analysis shows the LLCC is in a narrow area of low to moderate vertical wind shear.

Already downgraded from a severe tropical storm to a tropical depression, the system is forecast to continue weakening under the influence of northeasterly vertical wind shear associated with an upper level anticyclone over south-central China. This persistent wind shear will prevent significant reintensification prior to dissipation near TAU 36.

Tropical Storm 03W (Linfa) Expected to Brush Taiwan Coast This Weekend

19.4N 118.1E

June 19th, 2009 Category: Tropical Storms

Tropical Storm 03W - June 19th, 2009

Tropical Storm 03W - June 19th, 2009

TS03W - enhanced image

TS03W - enhanced image

Track of TS03W © Univ. of Wisconsin

Track of TS03W

Tropical Storm  03W (Linfa) formed in the South China Sea Thursday afternoon and is forecast to bring heavy rain to parts of Taiwan starting Friday, said China’s Central Meteorological Station.

The storm, the third of this year in the area, is located 785 nautical miles southwest of Okinawa with winds of up to 64.8 km per hour at the center. Maximum significant wave height is 15 feet.

It has remained quasi stationary over the past six hours and is forecast to linger at its current location, then move northeast to approach the sea south of Taiwan while gaining strength with maximum winds of up to 82.8 km per hour.

Strong gales are forecast to sweep the sea east of Taiwan, and rain is expected to hit the south and east areas of the island on Friday and Saturday. After brushing the east coast of Taiwan this weekend, it is predicted to head back out to sea in a northeasterly direction.

Tropical Storm 03W Forms in South China Sea After 5-Week “Break”

15.9N 114.3E

June 18th, 2009 Category: Tropical Storms

Tropical Storm 03W - June 18th, 2009

Tropical Storm 03W - June 18th, 2009

TS03W - enhanced image

TS03W - enhanced image

Track of TS03W © Univ. of Wisconsin

Track of TS03W

Following five weeks of hiatus since Typhoon Chan-Hom, a tropical storm has taken shape over the South China Sea off the northern Philippines.

Tropical Storm Three (03W) formed on Wednesday, local time, west of northern Luzon Island and about 300 miles south-southeast of Hong Kong.

It is currently located approximately 336 nautical miles southwest of Kaohsiung, Taiwan, after tracking east-northeastward at 2 knots over the past six hours.

Tropical Storm 03W will loiter nearly stationary for a day or two over the open South China Sea before tracking towards the northeast between Philippines and Taiwan.

Maximum significant wave height is currently 11 feet. Weather impact likely will be greatest over northwestern Luzon Island, Philippines, where flooding rain could fall between Thursday and Saturday.