NASA sees strong thunderstorms still surround Cyclone Iggy's center

AIRS captured infrared images and cloud temperatures of Tropical Cyclone Iggy on Jan. 31 at 0623 UTC (1:23 a.m. EST). Purple areas indicate the coldest cloud tops and strongest thunderstorms. Most of the strong thunderstorms surround the center of circulation. Credit: NASA/JPL, Ed Olsen<br>

The Atmospheric Infrared Sounder Instrument called AIRS that flies aboard NASA's Aqua satellite captures infrared data and basically takes the temperature of cloud tops in tropical cyclones. That's a critical component of a tropical cyclone because the colder the cloud top, the stronger the uplift and energy in the storm.

The threshold that indicates strongest thunderstorms and highest cloud tops is -63 Fahrenheit (-52.7 Celsius) in AIRS data, and cloud tops around Iggy's center were colder than that. That means there is still a lot of strength in the storm. AIRS data also shows there are tight bands of thunderstorms that are wrapping into the center of the storm. Microwave data from NASA's Aqua satellite showed an eye in the storm, despite its status as a tropical storm.

On January 31 at 1500 UTC (10 a.m. EST) Tropical Cyclone Iggy's maximum sustained winds had decreased to 50 knots ~58 mph/~93 kph). It was located 330 nautical miles (380 miles/611 km) west-southwest of Learmonth, Australia, near 24.5 South latitude and 108.3 East longitude. It is moving to the south-southwest at 13 knots (15 mph/24 kph). The storm is just over 220 nautical miles (~253 miles/~407 km) in diameter.

Iggy has begun moving to the south-southwest, and is expected to curve back later southeast towards southwestern Australia. Current forecasts expect Iggy to weaken as it runs into strong wind shear and cooler waters. Iggy may dissipate before making landfall.

Media Contact

Rob Gutro EurekAlert!

More Information:

http://www.nasa.gov

All latest news from the category: Earth Sciences

Earth Sciences (also referred to as Geosciences), which deals with basic issues surrounding our planet, plays a vital role in the area of energy and raw materials supply.

Earth Sciences comprises subjects such as geology, geography, geological informatics, paleontology, mineralogy, petrography, crystallography, geophysics, geodesy, glaciology, cartography, photogrammetry, meteorology and seismology, early-warning systems, earthquake research and polar research.

Back to home

Comments (0)

Write a comment

Newest articles

Lighting up the future

New multidisciplinary research from the University of St Andrews could lead to more efficient televisions, computer screens and lighting. Researchers at the Organic Semiconductor Centre in the School of Physics and…

Researchers crack sugarcane’s complex genetic code

Sweet success: Scientists created a highly accurate reference genome for one of the most important modern crops and found a rare example of how genes confer disease resistance in plants….

Evolution of the most powerful ocean current on Earth

The Antarctic Circumpolar Current plays an important part in global overturning circulation, the exchange of heat and CO2 between the ocean and atmosphere, and the stability of Antarctica’s ice sheets….

Partners & Sponsors