Couple storms have really flared up in Newton/NW Benton counties. These seem to be occurring in an area of maximum storm energy (CAPE) in the area (SBCAPE to 3000 J/kg due to all the sunshine & heating) with maximum wind convergence along the weakening cold front.
Storms have narrowing window to really maintain themselves as already so-so mid & upper support becomes less & the fuel runs out this evening. The high surface CAPE & downdraft CAPE will maintain pulsey isolated severe risk in Benton, Newton, Jasper counties a while longer, then storms should collapse. The high CAPE is also supporting strong updrafts to make some brief hail that may accrete to 1-1.25" diameter.
Here is the latest short-range, high-resolution forecast now-midnight:
Patchy fog should follow overnight-Friday morning. It could get very dense & be pretty widespread in Newton, Jasper & northern Benton counties, however (visibility 0.25 mile or less over that zone).
On a side note, notice that band of smoke on visible satellite & other less-noticeable blobs of milky smoke showing up in the Plains:
There is a lot of smoke to the West. More & more of this will become entrained into the area over the next few days (thousands of feet up, not near the ground). You will notice more colorful, golden, bronze sunrises & sunsets & more milky yellowish/sulfer/white haze in the sky.