A frontal boundary will move through Arkansas tomorrow afternoon and evening. In advance of the front, tomorrow will be very warm for October. In several places, record high temperatures could be challenged before the front passes by. Moisture levels will remain on the low side as the front approaches the state. Still, a few showers or t'storms could get going in the afternoon in central and (especially) south Arkansas. Not everyone will see rain, unfortunately.
The front will have moved through the state by early Tuesday with dry, mild air in its wake. Dry weather looks to prevail through much of this week with several dry cold fronts coming through periodically. The strongest one will be Friday and that cools the weekend down considerably.