Contact: Rob Gutro
NASA/Goddard Space Flight Center
Caption: On Feb. 29, 2012 at 1100 UTC (6 am EST) the AIRS infrared instrument on NASA's Aqua satellite observed that Irina's cloud top temperatures have grown colder since yesterday, indicating more strength in the storm. North of Irina's center, cloud top temperatures are now colder than -63 Fahrenheit (-52.7C), a threshold in AIRS data that indicates some of the strongest thunderstorms in a tropical cyclone.
Credit: Credit: NASA/JPL, Ed Olsen
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