Another thunderstorm complex is expected to develop to the west this evening and move eastward into portions of eastern Oklahoma and western Arkansas after midnight. Damaging winds from 60 to 70 mph will be the primary severe weather threat with this line of storms, although locally heavy rainfall is likely as well. Isolated flash flooding could become a concern in areas that saw a lot of rainfall earlier this morning. During the afternoon hours, isolated to scattered thunderstorms may develop across areas north of Interstate 40, posing a limited severe weather threat prior to the larger threat tonight. Chances for thunderstorms will largely remain across northeast Oklahoma and northwest Arkansas during the early part of this week as an upper level system moves across the Northern Plains. Upper level ridging will begin to build across the Southern Plains and will become the dominant weather feature from mid week on.