NASA's Aqua satellite has been providing data on Bopha since the day it formed on Nov. 26. In the storm's last days, Aqua's Atmospheric Infrared Sounder (AIRS) instrument captured infrared data of the storm and showed that cloud top temperatures warmed from Dec. 8 through Dec. 9 as cloud heights fell and thunderstorms lost their punch.
The MODIS instrument aboard NASA's Terra satellite captured this image of Bopha on Dec. 8 at 02:45 UTC (Dec. 7 at 9:45 p.m. EST/US) after it had regained typhoon status and was headed toward Luzon, Philippines.
Credit: NASA Goddard MODIS Rapid Response Team
By Dec. 9 at 0300 UTC (Dec. 8 at 10 p.m. EST/U.S.) the Joint Typhoon Warning Center issued its final advisory on Bopha. At that time it was a tropical depression located near 18.3 north latitude and 119.2 east longitude, about 240 miles north-northwest of Manila, Philippines. The depression was moving slowly at 3 knots (3.4 mph/5.5 kph) to the northeast and dissipating under adverse atmospheric conditions just west of Luzon.
On Dec. 9, AIRS data showed quite a different picture as the strongest thunderstorms no longer surrounded the center of circulation and were blown away from the center because of wind shear. The area of strong thunderstorms had also diminished greatly, indicating a weakening storm. Wind shear had taken its toll on this once deadly storm and had blown it apart.
Rob Gutro | EurekAlert!
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