Excessive Heat in Pittsburg, Oklahoma

A ridge of high pressure in the middle and upper atmosphere redeveloped over the south central United States during late July and continued into early August. Unseasonably hot afternoon temperatures reaching the mid 90s to near 100 degrees, combined with unseasonably high humidity, resulted in heat index values in the 110 to 115 degree range across much of eastern Oklahoma from July 29th through August 1st.