Forget fishing Harris for a little while
You can forget about catching much at Harris for some time. We went Sunday and fished several places and marked a lot of fish at 30-35 feet but couldn't get them to hit anything, spoons, jigs, minnows or anything I had in the box. I quickly found out why. We were watching a ton of birds diving on the shad but really couldn't figure out why because there was no dead shad around and with the higher temp they shouldn't be dying from cold shock. We fished a ways from the herd most of the time but went right where the birds were diving on the way out. When I went thru 37 feet of water it came up as 1 foot deep because the shad were so thick. My trolling motor was really thumping thru them, sounded like I was going thru weeds. Anyway, here's a video of my 12 year old daughter throwing the cast net. We did this about 10 times and no matter where we threw the net it came back with the same results.
I would say every crappie in that lake gained 2 or 3 pounds that day. They are probably sitting on the bottom not able to move.
https://www.youtube.com/watch?v=D2SGeApbL0Y