Cyclone Imelda turned the corner on NASA satellite imagery

Apr 11, 2013
NASA's Aqua satellite passed over Tropical Cyclone Imelda on April 11 at 0925 UTC (5:25 a.m. EDT). The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument aboard Aqua captured this visible image that showed a well-developed Tropical Cyclone Imelda in the Southern Indian Ocean. Credit: NASA Goddard MODIS Rapid Response Team

An area of low pressure moving toward Cyclone Imelda from the west has turned the storm to the south from its westward track, as NASA's Aqua satellite passed overhead and captured a visible and an infrared image of the powerful storm that showed the effects of wind shear.

NASA's Aqua satellite passed over Tropical Cyclone Imelda on April 11 at 0925 UTC (5:25 a.m. EDT). The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument aboard Aqua captured a visible image that showed a well-developed Tropical Cyclone Imelda in the Southern Indian Ocean that has now turned to the south. The MODIS image shows tightly-curved, powerful bands of thunderstorms stretching from the north to the east and south of the center of circulation, all wrapping into the center. MODIS imagery was created by the MODIS at NASA's Goddard Space Flight Center in Greenbelt, Md.

At the same time, the Atmospheric Infrared Sounder (AIRS) instrument that flies with MODIS aboard Aqua, captured an of Imelda. The image showed that the strongest convection and thunderstorms had been pushed east of center from . Those powerful thunderstorms had cloud top temperatures colder than -63 Fahrenheit (-52 Celsius), and were dropping heavy rainfall. The AIRS image was created at NASA's Jet Propulsion Laboratory in Pasadena, Calif.

imagery indicated that the strongest convection and most powerful thunderstorms are occurring in the storm's eastern quadrants as a result of an increase in wind shear. Powerful thunderstorms are also occurring over the center of circulation.

On April 11 at 0900 UTC (5 a.m. EDT), Cyclone Imelda had near 75 knots (80.5 mph/129.6 kph). Imelda is located near 13.1 south latitude and 57.9 east longitude, about 515 nautical miles (593 miles/954 km) north-northeast of La Reunion. Since interacting with the approaching area of low pressure from the west and then turning south, Imelda has slowed down, and is moving at just 2 knots (2.3 mph/3.7 kph).

The Joint Typhoon Warning Center forecasters expect Imelda to continue tracking generally southward over the next two days and then shift to the southeast as it starts moving around the edge of a ridge of high pressure.

The sea surface temperatures in the vicinity are still quite warm, between 28 and 29 Celsius (82.4 and 84.2 Fahrenheit) which forecasters believe may help Imelda strengthen a little more over the next two days. After that time, wind shear is expected to increase and quickly weaken the storm.

Explore further: Better forecasts for sea ice under climate change

add to favorites email to friend print save as pdf

Related Stories

NASA sees Cyclone Victoria developing an eye

Apr 11, 2013

Cyclone Victoria continued to intensify overnight from April 9 to April 10, and imagery from NASA's Aqua satellite showed a tighter storm circulation and a possible eye developing.

2 NASA satellites see Cyclone Gino's 'centered' power

Feb 13, 2013

Data from NASA's Aqua and Terra satellites showed powerful thunderstorms continued to wrap around the center of circulation Tropical Cyclone Gino as the storm achieved a category 2 hurricane status.

NASA eyes Typhoon Prapiroon's U-turn

Oct 10, 2012

Typhoon Prapiroon is making a U-turn in the Philippine Sea, changing direction from northwest to northeast. NASA's Aqua satellite captured an image of the typhoon as it began turning. Visible satellite imagery ...

Recommended for you

Better forecasts for sea ice under climate change

7 hours ago

University of Adelaide-led research will help pinpoint the impact of waves on sea ice, which is vulnerable to climate change, particularly in the Arctic where it is rapidly retreating.

"Ferrari of space' yields best map of ocean currents

15 hours ago

A satellite dubbed the "Ferrari of space" has yielded the most accurate model of ocean circulation yet, boosting understanding of the seas and a key impact of global warming, scientists said Tuesday.

Researcher studies deformation of tectonic plates

18 hours ago

Sean Bemis put his hands together side by side to demonstrate two plates of the earth's crust with a smooth boundary running between them. But that boundary is not always smooth and those plates do not always ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.