Tropical Depression Keuna's rainfall weakens

Jun 08, 2012
These two images of Kuena's rainfall from NASA's TRMM satellite show how the intensity waned between June 6 (left) and June 7 (right). The yellow, green and blue areas indicate light-to-moderate rainfall between 20 and 40 millimeters (.78 to 1.57 inches) per hour. The red area is considered heavy rainfall at 2 inches/50 mm per hour. There were no areas of heavy rain on June 7 as the system continued to weaken. Kuena's past and forecast track is shown overlaid in white on the left image. Credit: NASA/SSAI, Hal Pierce

The Tropical Rainfall Measuring Mission satellite called TRMM measures how much rain can fall per hour in storms. Between June 6 and 7, TRMM noticed the rainfall rate within Tropical Depression Kuena had lessened.

A tropical storm called Kuena formed in the southwest Indian Ocean east of Madagascar on June 6, 2012. This is a little unusual because the tropical cyclone season in that area normally ends on May 15, although two tropical storms formed in the north Atlantic this year before that season even officially started, so tropical cyclones seem to be ignoring the calendar this year.

The had an excellent view of Kuena when it flew directly above the newly formed storm on June 6, 2012 at 1607 UTC. A was made at NASA's Goddard Space Flight Center in Greenbelt, Md. that used data from TRMM's (TMI) and (PR) instruments. That analysis was overlaid on an enhanced infrared image from TRMM's Visible and (VIRS) instrument and showed heavy convective storms were dropping intense rainfall of over 50mm/hr (~2 inches) within the storm. A 3-D analysis of Kuena's vertical structure showed that a few of these powerful storms within Kuena were pushing to heights above 15km (~9.3 miles).

The TRMM satellite had another fairly good look at Kuena on June 7, 2012 at 0158 UTC. Data from TRMM's TMI instrument shows that Kuena was producing moderate rainfall over a large area of the south Indian Ocean east of Madagascar. There were no areas of intense rainfall on June 7, as there were on June 6.

At 1500 UTC (10 a.m. EDT) on June 7, the Joint noted that the last position of the low's center was near 8.7 South latitude and 55.5 East longitude. It was moving in a northwest direction as it continued weakening until it dissipated under strong wind shear conditions.

Explore further: Study shows air temperature influenced African glacial movements

add to favorites email to friend print save as pdf

Related Stories

TRMM satellite sees heavy rainfall in Tropical Storm Bud

May 23, 2012

Tropical Storm Bud is dropping heavy rainfall, and appears to be intensifying. NASA's Tropical Rainfall Measuring Mission (TRMM) satellite has been monitoring rainfall within the storm, and has watched it ...

TRMM satellite sees hot towers in Cyclone Koji

Mar 09, 2012

Hot towers, or towering thunderclouds that give off an excessive amount of latent heat, usually indicate a tropical cyclone will strengthen in six hours, and NASA's TRMM satellite saw some of them as it passed ...

Recommended for you

Melting during cooling period

10 hours ago

(Phys.org) —A University of Maine research team says stratification of the North Atlantic Ocean contributed to summer warming and glacial melting in Scotland during the period recognized for abrupt cooling ...

Warm US West, cold East: A 4,000-year pattern

13 hours ago

Last winter's curvy jet stream pattern brought mild temperatures to western North America and harsh cold to the East. A University of Utah-led study shows that pattern became more pronounced 4,000 years ago, ...

User comments : 0

More news stories

Melting during cooling period

(Phys.org) —A University of Maine research team says stratification of the North Atlantic Ocean contributed to summer warming and glacial melting in Scotland during the period recognized for abrupt cooling ...

Warm US West, cold East: A 4,000-year pattern

Last winter's curvy jet stream pattern brought mild temperatures to western North America and harsh cold to the East. A University of Utah-led study shows that pattern became more pronounced 4,000 years ago, ...

Down's chromosome cause genome-wide disruption

The extra copy of Chromosome 21 that causes Down's syndrome throws a spanner into the workings of all the other chromosomes as well, said a study published Wednesday that surprised its authors.

Researchers see hospitalization records as additional tool

Comparing hospitalization records with data reported to local boards of health presents a more accurate way to monitor how well communities track disease outbreaks, according to a paper published April 16 in the journal PLOS ON ...

Ebola virus in Africa outbreak is a new strain

The Ebola virus that has killed scores of people in Guinea this year is a new strain—evidence that the disease did not spread there from outbreaks in some other African nations, scientists report.