I like to fish the North side after a heavy rainfall using earthworms dug from the garden. I have had some specimen sized flounder out at these times, I think it`s because the flounder gorge themselves on the foodstuff being washed downstream by the increased rainfall as they don`t seem to go for the worms when there`s not been any rain for a while. It works for me and it`s a cheap and easily obtainable bait.