We had a few showers to start our week, but our Monday gradually grew drier. Aside from a stray shower or two, Monday night and Tuesday morning will stay dry. Tuesday afternoon, however, is a different story.
Showers are commonplace from the Deep South to the Midwest. A sharp end to the line is noted from northern Illinois to northern Missouri as drier air progresses through the Midwest. That drier air is on its way to the Tennessee Valley and will arrive Wednesday. The lead up can be showery with a few thunderstorms.
A few showers will begin forming around noon on Tuesday. Showers will grow more widespread through around 4 PM. Rain can fall heavily at times. A stray stronger thunderstorm can bring frequent dangerous lightning and 40-50 mph wind gusts. Those stronger storms will be isolated. Showers will begin diminishing between 4 PM and 6 PM, fading to an end by 8 PM.
That drier air will arrive on Wednesday to reduce the chance for rain to only a stray shower for both Wednesday and Thursday. The humidity will also drop enough that you will notice it, and the air will feel less heavy and more comfortable. Humidity will return for the end of the week, and so will the higher chance for scattered showers and thunderstorms.