NASA Satellite Observes Unusually Hot July in the Great Plains

[OKIsItJustMe]

http://www.nasa.gov/topics/earth/features/record-heat.html

NASA Satellite Observes Unusually Hot July in the Great Plains

08.31.11

Much of the United States sweated through an unusually humid heat wave during July, a month that brought record-breaking temperatures to many areas across the Great Plains. As temperatures soared, NASA satellites observed the unusual weather from above.

The Atmospheric Infrared Sounder (AIRS), an instrument launched on the Aqua satellite in 2002, is unique in its ability to yield highly accurate data about the troposphere, the lowest layer of the atmosphere and the part that most directly affects life on Earth.

Hot temperatures struck Texas and Oklahoma particularly hard, AIRS observed. Large swaths of both of these states persistently experienced highs above 100° F (311 K) during the day for the month of July. Nights offered only minimal relief with low temperatures averaging close to 90° F (305 K) for the month. That’s about 20° F warmer, both day and night, than the average July temperatures for the past eight years of AIRS observations.



…

AIRS also offered clues about what may have caused the persistent heat spell. Domes of high atmospheric surface pressure (corresponding to the red colors in the figure below) normally intensify in the summer over both the Atlantic and Pacific oceans. However, AIRS data shows they were abnormally strong in July.



…