[Tigen]

Maybe.
The lines are very straight though.

[KarlInOhio]

We must be seeing different things. Maybe since I’m on a tablet they give me a low resolution image.

[KarlInOhio]

Finally on a laptop with a better screen. It is still raining there and I see a radial pattern all pointing at the radar location (35.3399228 N, 94.3543549 W which is at the Fort Smith airport). To me it looks like either ground clutter or artifacts from removal of ground clutter. Figure out the radar return on a perfectly clear day, store that and then subtract it from the rain.

Look at http://www.usairnet.com/weather/radar/?station=KSRX which has more precise return data and click on the Animation Loop link. The radial lines appear going generally southward (assuming it is still raining when you go there).