NASA sees warmer cloud tops in infrared imagery of Tropical Storm Eugene

Aug 06, 2011
NASA's Aqua satellite passed over Eugene in the eastern Pacific Ocean on Aug. 5 at 10:05 UTC (6:05 a.m. EDT) This infrared image was taken from the AIRS instrument on NASA's Aqua satellite and it revealed a weakening storm with warmer (blue) cloud top temperatures. Coldest temperatures appear in purple. Credit: NASA JPL, Ed Olsen

Warmer cloud top temperatures mean that cloud heights in a tropical cyclone are dropping and the storm doesn't have as much power to push them higher in the atmosphere. That's what NASA infrared satellite imagery has revealed about Tropical Storm Eugene this morning.

During the very early morning hours (Eastern Daylight Time) on August 5, Eugene was still hurricane strength. Then the storm ran into cooler waters and a more stable atmosphere, weakening into a tropical storm.

That weakening was confirmed in satellite imagery from the Atmospheric Infrared Sounder (AIRS) instrument (that flies on NASA's Aqua satellite) on August 5 at 10:05 UTC (6:05 a.m. EDT). basically takes an object's temperature. The AIRS infrared image showed that the cloud top temperatures had warmed since midnight, indicating that the cloud heights dropped and the power behind the uplift that creates the thunderstorms had waned quickly.

At 11 a.m. EDT (8 a.m. PDT) on August 5, Tropical Storm Eugene's were near 65 mph (100 kmh). It was located at sea near 17.9 North and 123.3 West, about 935 miles (1500 km) west-southwest of the southern tip of Baja California. Eugene was still moving to the west-northwest at 13 mph (20 kmh) and had a minimum central pressure of 996 millibars.

The National Hurricane Center expect that Eugene will become a remnant low by Sunday, August 7 as it continues to move into a more stable environment and cooler waters.

Explore further: Kiribati leader visits Arctic on climate mission

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Kiribati leader visits Arctic on climate mission

14 hours ago

Fearing that his Pacific island nation could be swallowed by a rising ocean, the president of Kiribati says a visit to the melting Arctic has helped him appreciate the scale of the threat.

NASA catches a weaker Edouard, headed toward Azores

Sep 19, 2014

NASA's Aqua satellite passed over the Atlantic Ocean and captured a picture of Tropical Storm Edouard as it continues to weaken. The National Hurricane Center expects Edouard to affect the western Azores ...

User comments : 0