All I can say is the crappie will scatter out and they will be somewhat harder to catch. During these times usually my knowing where I placed fish habitat will pay off. But don't bet on one place move pretty fast to another one if they don't bite very fast. Use minnows or a spinner type artificial bait(road runners are good) with slabsauce or crappie nibble helps during this time when casting or long lining and spider rigging.