Nav: Home

NASA analyzes short-lived Bay of Bengal cyclone

December 12, 2017

NASA analyzed the rainfall generated by short-lived Tropical Cyclone 04B that formed and faded over a day in the Bay of Bengal.

A substantial area of the Northern Indian Ocean was recently covered with cloudiness and rain showers as a large tropical low pressure area moved over the warm waters of the Bay of Bengal. After being closely monitored for over a week, the tropical disturbance intensified briefly to tropical storm force in the northern Bay of Bengal. It was labeled tropical cyclone 04B on December 9, 2017. The weak system produced moderate to heavy rainfall along northeastern India's Bay of Bengal coastline, moved over southern Bangladesh and dissipated over northwestern Burma.

At NASA's Goddard Space Flight Center in Greenbelt, Maryland, a rainfall accumulation analysis was created on 04B. It was derived from NASA's Integrated Multi-satellitE Retrievals data (IMERG).

NASA's GPM or Global Precipitation Measurement mission satellite provides information on precipitation from its orbit in space. GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency or JAXA. GPM also utilizes a constellation of other satellites to provide a global analysis of precipitation that are used in the IMERG calculation.

At NASA Goddard, an animation of IMERG rainfall accumulation total estimates showed the progression of rainfall through the Bay of Bengal for the period from December 4 to 11, 2017. Those IMERG rainfall estimates showed that the heaviest rainfall occurred in the Bay of Bengal well to the east of India's coast. A total of more than 508 mm (20 inches) of rain was analyzed in the Bay of Bengal as the tropical disturbance moved slowly through the area.

The analysis also showed rainfall accumulation caused by tropical cyclone Ockhi.

The GPM core observatory satellite had a good view of tropical cyclone 04B's remnants on Dec. 10 at 10:57 a.m. EST (1557 UTC). Data collected by GPM's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) instruments showed than heavy rain was only occurring in a small cluster of storms over southeastern Bangladesh. GPM's radar (DPR Ku band) found rain falling at more than 70 mm (2.75 inches) per hour in one storm.

GPM's radar (DPR Ku band) data were used in a close-up 3-D view of rainfall within the few remnants of tropical cyclone 04B. This view (looking toward the northeast) showed that storm tops were reaching heights greater than 11.5 km (7.1 miles) in a small cluster of energetic storms.

The Joint Typhoon Warning Center issued the final bulletin on Tropical Cyclone 04B on Dec. 9 at 4 a.m. EST (0900 UTC). At that time Tropical cyclone 04B was located near 18.8 degrees north latitude and 86.8 degrees east longitude, about 245 miles south-southwest of Kolkata, India. 04B had maximum sustained winds near 35 knots (40 mph/62 kph) and weakening quickly under vertical wind shear.

Tropical Cyclone 04B dissipated before making landfall.
-end-


NASA/Goddard Space Flight Center

Related Rainfall Articles:

NASA looks at rainfall from Tropical Storm Dora
Now a tropical storm, Hurricane Dora has been skirting southwestern Mexico's coast since it formed and has transported tropical moisture onshore that has produced some heavy rain showers.
NASA adds up Tropical Storm Cindy's rainfall
Tropical storm Cindy was downgraded to a tropical depression after moving onshore near the Texas and Louisiana Border on Thursday June 22, 2017 and bringing a lot of rain with it.
Bangladesh's heavy rainfall examined with NASA's IMERG
At least 156 people in Bangladesh were killed during the past week by landslides and floods caused by heavy rainfall.
NASA looks at extreme Florida rainfall by satellite
Extremely heavy rain has recently fallen over Florida and the Global Precipitation Measurement or GPM mission core satellite looked at that some of that rainfall on June 7.
Summer rainfall in vulnerable African region can be predicted
Summer rainfall in one of the world's most drought-prone regions can now be predicted months or years in advance, climate scientists at the Met Office and the University of Exeter say.
More Rainfall News and Rainfall Current Events

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Teaching For Better Humans
More than test scores or good grades — what do kids need to prepare them for the future? This hour, guest host Manoush Zomorodi and TED speakers explore how to help children grow into better humans, in and out of the classroom. Guests include educators Olympia Della Flora and Liz Kleinrock, psychologist Thomas Curran, and writer Jacqueline Woodson.
Now Playing: Science for the People

#535 Superior
Apologies for the delay getting this week's episode out! A technical glitch slowed us down, but all is once again well. This week, we look at the often troubling intertwining of science and race: its long history, its ability to persist even during periods of disrepute, and the current forms it takes as it resurfaces, leveraging the internet and nationalism to buoy itself. We speak with Angela Saini, independent journalist and author of the new book "Superior: The Return of Race Science", about where race science went and how it's coming back.