Taking my dad Friday! Cloudy with 50% chance of rain. Actually sounds like a combination for success. Any info where and how for someone who hasnt been there in years is appreciated!
If you want numbers go to the hot water discharge and throw a carolina rig with a 1 oz weight with about a 3' leader. Use a chartreuse pepper Centipede or Baby Rattlesnake. Try one side of the current if no success try the other side. Keep your boat just off to the side and throw toward the fast water.
There is underwater riprap to keep the current from eroding the bottom on both sides. You will feel it. Most of the time the fish will hang just on the edge of the current.
The highway bridge is another good spot for numbers. Throw the same setup at all 4 corners of the bridge. One of them will normally be better than the others. It will be the one with two boats sitting on it...

If it is heavy overcast the RR bridge is another good place to get bit. Just fish the flat between the powerline wires and the RR bridge with the C-rig. Keep a Trap rigged to throw at any schoolers that may pop up.
If you don't know the timber fields stay out of them. The stumps there are brutal! Much worse than Fork. They are like concrete!
Good luck!