Apr. 24, 2019 – NASA Examines Tropical Cyclone Kenneth in Infrared Light
The Atmospheric Infrared Sounder or AIRS instrument aboard NASA’s Aqua satellite passed over Tropical Cyclone Kenneth and analyzed the storm in infrared light.
Infrared light provides scientists with temperature data and that is important when trying to understand how strong storms can be. The higher the cloud tops, the colder and the stronger they are. So infrared light as that gathered by the AIRS instrument can identify the strongest sides of a tropical cyclone.
NASA’s Aqua satellite flew over Kenneth on April 23 at 6:41 a.m. EDT (1041 UTC). AIRS detected strongest storms around the center of circulation and in a band of thunderstorms southwest of the center. Those areas revealed cloud top temperatures as cold as minus 63 degrees Fahrenheit (minus 53 degrees Celsius). Storms with cloud top temperatures that cold extend high into the troposphere and have the capability to produce heavy rainfall.
On April 24, Kenneth was located northeast of the island nation of Madagascar in the Southern Indian Ocean. The Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA’s Aqua satellite provided a visible image of Tropical Cyclone Kenneth as it moved into the Mozambique Channel. The Channel is a body of water located between the island nation of Madagascar and Mozambique on the African mainland.
On April 24 at 5 a.m. EDT (0900 UTC) Tropical cyclone Kenneth was located near 10.9 degrees south latitude and 45.7 east longitude. That is 148 nautical miles east-northeast of Comoros Island. Kenneth was moving to the west. Maximum sustained winds had increased to 70 knots (80 mph/130 kph) making Kenneth hurricane-strength.
Forecasters at the Joint Typhoon Warning Center expect Kenneth to move west and then shift toward the west-southwest while strengthening to 105 knots (121 mph/194 kph) prior to landfall in northern Mozambique.
For more information about AIRS, visit: airs.jpl.nasa.gov.
By Rob Gutro
NASA’s Goddard Space Flight Center