A very warm, humid and unstable airmass across the Ohio Valley is setting the stage for severe thunderstorms this afternoon and later tonight. A few thunderstorms may develop later this afternoon, mainly near an outflow boundary which stretches from eastern Indiana into south central Ohio. Any storms which develop this afternoon may become severe with large hail and damaging winds.
A more organized complex of thunderstorms is expected to develop across the mid-Mississippi Valley and lower Great Lakes this evening, and roll into parts of the Ohio Valley late this evening and overnight. The potential exists for a widespread damaging wind event across parts of Indiana, Ohio and far northern Kentucky tonight, with significant damaging winds in excess of 70 mph possible. Large hail and isolated tornadoes are also possible. In addition, these storms may contain very heavy rainfall which may lead to areas of flooding.
Stay tuned to NOAA weather radio or your local media outlet for more information on this potentially dangerous situation.