Excessive Heat in Sequoyah, Oklahoma

A ridge of high pressure in the middle and upper atmosphere redeveloped over the south central United States during late June, and continued into early July. 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 on the 1st through the 4th. At least fifteen people were treated for heat-related issues in Tulsa, ten of which were transported to the hospital.