Nav: Home

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:

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.
NASA sees Tropical Depression 01W come together
Tropical Depression 1W formed just west of the Philippines in the Sulu Sea as NASA's Terra satellite passed overhead early on Jan.
More Tropical Depression News and Tropical Depression Current Events

Top Science Podcasts

We have hand picked the top science podcasts of 2019.
Now Playing: TED Radio Hour

In & Out Of Love
We think of love as a mysterious, unknowable force. Something that happens to us. But what if we could control it? This hour, TED speakers on whether we can decide to fall in — and out of — love. Guests include writer Mandy Len Catron, biological anthropologist Helen Fisher, musician Dessa, One Love CEO Katie Hood, and psychologist Guy Winch.
Now Playing: Science for the People

#541 Wayfinding
These days when we want to know where we are or how to get where we want to go, most of us will pull out a smart phone with a built-in GPS and map app. Some of us old timers might still use an old school paper map from time to time. But we didn't always used to lean so heavily on maps and technology, and in some remote places of the world some people still navigate and wayfind their way without the aid of these tools... and in some cases do better without them. This week, host Rachelle Saunders...
Now Playing: Radiolab

Dolly Parton's America: Neon Moss
Today on Radiolab, we're bringing you the fourth episode of Jad's special series, Dolly Parton's America. In this episode, Jad goes back up the mountain to visit Dolly's actual Tennessee mountain home, where she tells stories about her first trips out of the holler. Back on the mountaintop, standing under the rain by the Little Pigeon River, the trip triggers memories of Jad's first visit to his father's childhood home, and opens the gateway to dizzying stories of music and migration. Support Radiolab today at Radiolab.org/donate.