Widely scattered showers and thunderstorms will be possible this afternoon. Brief heavy rain and gusty winds will be the main threat with any storms that develop. A few isolated thunderstorms could persist or redevelop tonight, however precipitation coverage is expected to remain limited. Hot and humid conditions are likely this afternoon with heat indices climbing into the 105 to 107 degree range across portions of eastern Oklahoma and west central Arkansas. A heat advisory is in effect for those areas through 8 PM this evening.
The dangerous heat will persist on Wednesday with afternoon heat indices in the 105 to 110 degree range. A heat advisory will likely be required for much of the area. The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible.
A cold front will move into the area late Wednesday afternoon into Wednesday evening. A few strong to severe storms will be possible along and ahead of the front. Damaging winds and brief heavy rainfall will be the main threats. A drier airmass will spread over the area behind the front late in the week, and will offer slightly cooler temperatures. Precipitation chances will return late Sunday into Monday as tropical moisture begins to lift north into the region.