Nav: Home

NASA examines Tropical Cyclone Dumazile's flooding rainfall

March 06, 2018

Tropical cyclone Dumazile formed east of Madagascar on March 3, 2018 and brought soaking rainfall to Madagascar. The GPM or Global Precipitation Measurement mission core satellite obtained a look at the soaking Dumazile gave the island nation.

The tropical cyclone has caused flooding as it moved parallel to Madagascar's eastern coast. The clockwise rotation of the tropical cyclone has been transporting bands of rain onto Madagascar. Over 210 mm (8.3 inches) of precipitation was reported along the northeastern coast of Madagascar.

The GPM core observatory satellite passed over eastern Madagascar on March 3, 2018 at 12:10 a.m. EST (1710 UTC). Tropical Cyclone Dumazile was located in the Indian Ocean east of northeastern Madagascar. When GPM passed overhead, the tropical cyclone was intensifying and was close to typhoon power but the eye didn't form until a day or two later.

The GPM satellite, managed by both NASA and the Japan Aerospace Exploration Agency, JAXA, collected data that showed Dumazile contained bands of extremely heavy rainfall. As the satellite flew overhead GPM's Microwave Imager (GMI) and Dual Frequency Precipitation Radar (DPR) collected data that showed an intense band of rain hitting Madagascar's eastern coast. GPM's radar (DPR Ku Band) data showed that a powerful storm in this rain band was dropping rain at a rate of over 160 mm (6.3 inches) per hour. Even heavier precipitation was spotted by the satellite in other storms approaching the coast. GPM's DPR data indicated that one of these storms was producing rain at a rate of over 216 mm (8.5 inches) per hour.

At NASA's Goddard Space Flight Center, in Greenbelt, Md. a 3-D view using GPM data showed the precipitation structure in Dumazile's rain bands were hitting eastern Madagascar. GPM's radar measurements of storms within those rain bands showed that Tropical Cyclone Dumazile was generating storms with heights above 13.7 km (8.5 miles).

On March 6 at 5:12 a.m. EST (10:12 UTC), the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard NASA-NOAA's Suomi NPP satellite provided a visible look at Tropical Cyclone Dumazile, located off Madagascar's southeastern coast. The VIIRS image showed that the eye had become cloud-filled and disappeared.

On March 6, 2018 at 10 a.m. EST (1500 UTC), Tropical Cyclone Dumazile's maximum sustained winds dropped to 95 knots (109.3 mph/180 kph). Dumazile continued to move away from Madagascar and was centered near 4.6 degrees south latitude and 54.0 degrees east longitude, about 241 nautical miles south-southwest of St. Denis, La Reunion. Dumazile was moving to the southeast at 13 knots (15 mph/24 kph) and is expected to continue tracking in that direction over the next couple of days.

The Joint Typhoon Warning Center or JTWC noted that animated multispectral satellite imagery, that can peer through clouds showed that Dumazile still maintained a 10-nautical mile wide eye that appeared cloud-filled in Suomi NPP's visible imagery. Feeder bands of thunderstorms remained tightly wrapped into the low-level center but had become more shallow and asymmetric.

The Joint Typhoon Warning Center predicts that the tropical cyclone will weaken while moving southeastward. Cooler sea surface temperatures and increasing vertical wind shear are then expected to cause Dumazile to rapidly weaken.

NASA/Goddard Space Flight Center

Related Precipitation Articles:

Precipitation will be essential for plants to counteract global warming
A new Columbia Engineering study shows that increased water stress--higher frequency of drought due to higher temperatures, is going to constrain the phenological cycle: in effect, by shutting down photosynthesis, it will generate a lower carbon uptake at the end of the season, thus contributing to increased global warming.
Fall precipitation predicts abundance of curly top disease and guides weed management
Transmitted by an insect known as the beet leafhopper, curly top disease is a viral disease affecting many crops, including melons, peppers, sugar beets, and tomatoes.
Study confirms climate change impacted Hurricane Florence's precipitation and size
A new modeling framework showed that Hurricane Florence produced more extreme rainfall and was spatially larger due to human-induced climate change.
Study shows link between precipitation, climate zone and invasive cancer rates in the US
In a new study, researchers provide conclusive evidence of a statistical relationship between the incidence rates of invasive cancer in a given area in the US and the amount of precipitation and climate type (which combines the temperature and moisture level in an area).
Steep momentum gradients play a major role in coastal precipitation
Steep gradients of wind stress and potential temperature enable sustainable nearshore precipitation systems along the western coastal region of Korea.
Increasing precipitation extremes driving tree growth reductions across southwest
As the Earth's temperature warms, its hydrological cycle kicks into overdrive - wet years get wetter, and dry years get drier.
Extreme flooding from storm surge and heavy precipitation projected to increase higher probability of compound flooding from precipitation and storm surge in Europe under anthropogenic climate change
Risk of compound flooding, which can result when rapid sea level rises associated with storms occur along with heavy rains, is currently concentrated along Mediterranean countries but will greatly increase for Northern European in the future as the climate warms, according to a new modeling study.
NASA reveals heavy rainfall in Tropical Cyclone Fani
Satellite data revealed heavy rainfall in powerful Tropical Cyclone Fani before it made landfall in northeastern India.
Wildfire risk in California no longer coupled to winter precipitation
Wet winters no longer predict possible relief from severe wildfires for California.
More water resources over the Sahel region of Africa in the 21st century under global warming
Scientists from Institute of Atmospheric Physics, Chinese Academy of Sciences found that the projection uncertainty of Sahel summer precipitation among the climate models is closely related to the historical precipitation simulation in South Asia and the western North Pacific.
More Precipitation News and Precipitation Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Listen Again: Reinvention
Change is hard, but it's also an opportunity to discover and reimagine what you thought you knew. From our economy, to music, to even ourselves–this hour TED speakers explore the power of reinvention. Guests include OK Go lead singer Damian Kulash Jr., former college gymnastics coach Valorie Kondos Field, Stockton Mayor Michael Tubbs, and entrepreneur Nick Hanauer.
Now Playing: Science for the People

#562 Superbug to Bedside
By now we're all good and scared about antibiotic resistance, one of the many things coming to get us all. But there's good news, sort of. News antibiotics are coming out! How do they get tested? What does that kind of a trial look like and how does it happen? Host Bethany Brookeshire talks with Matt McCarthy, author of "Superbugs: The Race to Stop an Epidemic", about the ins and outs of testing a new antibiotic in the hospital.
Now Playing: Radiolab

Dispatch 6: Strange Times
Covid has disrupted the most basic routines of our days and nights. But in the middle of a conversation about how to fight the virus, we find a place impervious to the stalled plans and frenetic demands of the outside world. It's a very different kind of front line, where urgent work means moving slow, and time is marked out in tiny pre-planned steps. Then, on a walk through the woods, we consider how the tempo of our lives affects our minds and discover how the beats of biology shape our bodies. This episode was produced with help from Molly Webster and Tracie Hunte. Support Radiolab today at