I checked the radar loop on Intellicast and it looked like a gap in the regionwide rain occured there. That “anomaly” is just the background color of the map without rain at that spot.
So you didn’t look at map box on the page listed?
What’s wrong with doing that?
Too difficult?
My radar app is also showing a constant gap in the rain at Ft. Chaffee. Could be a glitch since it’s not moving or perhaps something that they’re doing there is stopping the return signal.