Tropical Depression 11S forms in the southern Indian Ocean

Jan 28, 2010
At 11:20 p.m. ET Jan. 27, the Tropical Rainfall Measuring Mission or TRMM satellite, captured Tropical Depression 11S's rainfall, as it was centered east of La Reunion Island. Although most of the rainfall was light to moderate (yellow and green) there were some areas of heavy rain of over 2 inches per hour (red). Credit: NASA/SSAI, Hal Pierce

The eleventh tropical depression formed today in the Southern Indian Ocean south of Port Louis. It will continue on a southeasterly track and move into open ocean.

At 4 a.m. ET (09:00 UTC) on January 28, 11S (TD 11S) had near 39 mph (35 knots). It was located about 180 nautical miles east of La Reunion, near 21.7 degree South latitude and 58.9 degrees East longitude. TD 11S is moving southward near 6 mph (5 knots).

La Reunion Island is a French island located in the Southern Indian Ocean, east of Madagascar and about 120 miles southwest of the island of Mauritius.

At 11:20 p.m. ET January 27, the Measuring Mission, or TRMM satellite captured 11S's rainfall, as it was centered east of La Reunion Island. Although most of the rainfall was light to moderate there were some areas of heavy rain of over 2 inches per hour. For more information on the TRMM satellite, go to: www.trmm.nasa.gov.

Despite being in an area of low wind shear, TD 11S has a fully exposed low-level circulation center, which opens the storm's circulation up to wind shear and dry air. Low wind shear helps a storm strengthen, while open circulation lends itself to weakening a storm.

Over the next day or two, however, TD 11S is expected to redevelop and convection (rapidly rising air that forms thunderstorms) and strengthen as it moves over warm sea surface temperatures. After it strengthens, then over the weekend, it is expected to become extra-tropical while remaining over open ocean.

Explore further: NASA's HS3 looks Hurricane Edouard in the eye

add to favorites email to friend print save as pdf

Related Stories

NASA satellite sees rainfall in ebbing Edzani

Jan 12, 2010

NASA's Tropical Rainfall Measuring Mission satellite captured a clear picture of what's happening within Tropical Storm Edzani, including where the rainfall is happening and where the center of the storm has ...

Cyclone Anja hits wind shear, weakens drastically

Nov 17, 2009

This morning, Cyclone Anja was a powerful Category 4 cyclone on the Saffir-Simpson scale. Wind shear has now giving Anja a strong "punch in the gut" as the storm has weakened to a Category 1 cyclone.

Recommended for you

NASA's HS3 looks Hurricane Edouard in the eye

9 hours ago

NASA and NOAA scientists participating in NASA's Hurricane and Severe Storms Sentinel (HS3) mission used their expert skills, combined with a bit of serendipity on Sept. 17, 2014, to guide the remotely piloted ...

Tropical Storm Rachel dwarfed by developing system 90E

14 hours ago

Tropical Storm Rachel is spinning down west of Mexico's Baja California, and another tropical low pressure area developing off the coast of southwestern Mexico dwarfs the tropical storm. NOAA's GOES-West ...

NASA ocean data shows 'climate dance' of plankton

17 hours ago

The greens and blues of the ocean color from NASA satellite data have provided new insights into how climate and ecosystem processes affect the growth cycles of phytoplankton—microscopic aquatic plants ...

Glaciers in the grand canyon of Mars?

18 hours ago

For decades, planetary geologists have speculated that glaciers might once have crept through Valles Marineris, the 2000-mile-long chasm that constitutes the Grand Canyon of Mars. Using satellite images, ...

NASA support key to glacier mapping efforts

18 hours ago

Thanks in part to support from NASA and the National Science Foundation, scientists have produced the first-ever detailed maps of bedrock beneath glaciers in Greenland and Antarctica. This new data will help ...

User comments : 0