Very dangerous heat and humidity will occur again today, with a large portion of the eastern Oklahoma and west central Arkansas likely to see heat index values exceeding 110 degrees. Maximum heat indices will be in the triple digits for most locations. Both an Excessive Heat Warning and a Heat Advisory are in effect this afternoon for much of the area. In addition, a few thunderstorms currently in Kansas may move southeastward into portions of far northeast Oklahoma and far northwest Arkansas this morning. Severe weather is not anticipated. The dangerous heat and humidity, with maximum heat index values at least in the 105 to 110 range, will persist into Monday areawide and into Tuesday for areas along and south of Interstate 40. A Heat Advisory is already in effect for all of eastern Oklahoma and northwest and west central Arkansas tomorrow afternoon. Thunderstorm chances will increase late Monday night and continue into Wednesday as a cold front pushes through the region. Widespread severe weather is currently not anticipated, but a few of the stronger storms on Tuesday may produce damaging winds and marginally severe hail. Cooler and quieter weather will follow the frontal passage for the rest of the week and into next weekend.
Dangerous Heat, Humidity Persist
By NWS-Tulsa • Aug 11, 2019