some of my best number days have been pre, during and post rain periods. My first LM over 5lbs came during a heavy rain in may on a black 10" culprit worm. It was raining so hard i couldnt see the end of the boat dock (about 10 foot away!) but from personal experience ive always done better before and during. dont get me wrong ive still caught em after rain just seems like they bite more eagerly prior to or during rain.