From the national weather service in Tulsa Oklahoma 4:55am. Dangerous heat persists across the region today. An Excessive Heat Warning is in effect from noon until 9 PM for much of eastern Oklahoma and west-central Arkansas. A Heat Advisory is in effect from noon until 9 PM for parts of far northeast Oklahoma and far northwest Arkansas. Maximum heat indices between 110-115 degrees are expected within the warning area and up to 109 degrees in the advisory. Afternoon and evening storms may develop again today near a weak surface boundary. Some storms may become strong to severe, with damaging winds in excess of 70 miles an hour being the main severe weather threat.