NASA looks at rainfall intensity in Tropical Depression Bolaven

January 04, 2018

The Global Precipitation Measurement mission or GPM core satellite gathered data on rainfall rates occurring in Tropical Depression Bolaven as it moved toward Vietnam. Bolaven's final warning was issued early today, Jan. 4.

Tropical depression Bolaven drenched the Philippines and is moving west through the South China Sea toward southern Vietnam. Bolaven is the third deadly tropical cyclone to hit the Philippines in less than a month. Tropical storm Kai-Tak and Tembin caused widespread destruction last month in much of the same area of the Philippines. Bolaven, known as Agaton in the Philippines, was the first tropical cyclone to hit the Philippines this year. Heavy rain with Bolaven caused flooding, landslides and at least two deaths in the Philippines.

The GPM core observatory satellite passed over the center of Bolaven on January 2, 2018 at 1:21 p.m. EST (1821 UTC). GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency, JAXA.

Bolaven had moved into the South China Sea and had winds estimated at 30 knots (34.5 mph/55.5 kph) making it a tropical depression on the Saffir-Simpson hurricane wind scale. Data collected by GPM's Microwave Imager (GMI) and Dual Frequency Precipitation Radar (DPR) instruments showed that rain was falling at a rate of almost 121 mm (4.8 inches) per hour in a band of convective storms northwest of Bolaven's center of circulation.

At NASA's Goddard Space Flight Center in Greenbelt, Md. a 3-D view of Tropical Depression Bolaven was created from GPM's Radar data (DPR Ku Band). The 3-D image showed a simulated cross-section through precipitation within the storm. Radar reflectivity values greater than 50dBZ were frequently revealed in the vertical slice through the western side of GPM's radar swath. GPM's radar also showed that a few storm tops had heights exceeding 16 km (9.92 miles).

The Joint Typhoon Warning Center (JTWC) issued the final warning on Bolaven on Jan. 4 at 0300 UTC (Jan. 3 at 10 p.m. EST). At that time, maximum sustained winds were down to 25 knots (28.7 mph/46.3 kph). It was centered near 2.3 degrees north latitude and 110.5 degrees east longitude, about 268 nautical miles east-northeast of Ho Chi Minh City, Vietnam. Bolaven was moving to the northwest at 9 knots (10.3 mph/16.6 kph).

Satellite imagery early on Jan. 4 showed a fully exposed low-level circulation center with decaying thunderstorms pushed to the north of the center from vertical wind shear. Bolaven is forecast to rapidly dissipate after it makes landfall north of Ho Chi Minh, Vietnam later on Jan. 4.
-end-
For regional forecasts, visit Vietnam's National Center for Hydrometeorology website: http://www.nchmf.gov.vn.

NASA/Goddard Space Flight Center

Related Tropical Depression Articles from Brightsurf:

NASA finds strength in new Gulf Tropical Depression 8
NASA's Aqua satellite used infrared light to identify the strongest storms and coldest cloud top temperatures in Tropical Depression 8, spinning in the Gulf of Mexico.

NASA finds Tropical Depression Peipah dissipating
NASA's Terra satellite passed over the northwestern Pacific Ocean and provided a final view of Tropical Depression Peipah.

NASA analyzes new Atlantic depression's tropical rainfall
Tropical Depression 3 has formed about off the eastern coast of central Florida.

Tropical Depression Gordon still lingering over Arkansas
Tropical Depression Gordon just doesn't want to give up. Gordon is meandering in the southern US and satellites pinpointed its center over Arkansas on Friday, Sept.

Satellites tracking the rainfall from Tropical Depression Gordon
Gordon is still considered a tropical depression as it makes its way into the south central US NOAA's GOES-East satellite provided an infrared look at clouds associated with Gordon and found its center over Mississippi.

NASA satellite finds Jongdari a Tropical Depression
NASA-NOAA's Suomi NPP satellite found Tropical Depression Jongdari was still being battered by wind shear.

NASA sees Tropical Depression Jongdari stretched out
Wind shear is stretching out Tropical Storm Jongdari and NASA's Aqua satellite captured and image that showed the oval-shaped storm.

NASA finds development of Tropical Depression 16W
Tropical Depression 16W formed in the northwestern Pacific Ocean despite vertical wind shear.

NASA catches tropical depression 9E at peak before dissipation
The Eastern Pacific Ocean's Tropical Depression 9E formed on July 26 and by July 27 the depression had dissipated over 1,200 miles from Hilo, Hawaii.

NASA looks at rainfall intensity in Tropical Depression Bolaven
The Global Precipitation Measurement mission or GPM core satellite gathered data on rainfall rates occurring in Tropical Depression Bolaven as it moved toward Vietnam.

Read More: Tropical Depression News and Tropical Depression Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.