A very anomalous weather pattern was in place over the U.S. for mid-July. Trapped between an upper-level ridge centered over the Ohio Valley and the closed upper-level low over the Texas/Oklahoma border, atypical hot, muggy air was stifling a broad swath of the eastern U.S. The closed low was expected to drift west toward New Mexico bringing heavy, localized rain to some areas and temperatures running 10-20 degrees below mid-July averages. Across the east, temperatures warmed well into the 90s and stayed there through the week.
This image was taken by the GOES East satellite at 12:45 p.m. EDT on July 15, 2013.