by Stephanie CrosbyHeavy rains over Derby weekend prompted flooding in many parts of the state, and could lead to the wettest May on record in some parts of Kentucky.Tom Reaugh with the National Weather Service says areas like Bowling Green and Frankfort have already reached their second-highest rainfall for the month.“Right now, Bowling Green has about an inch and a half to go to get to number one," says Reaugh. "They would have to have some pretty good thunderstorm activity in order to make that, but it’s not entirely out of the realm of possibility.”In Louisville, Reaugh says they’ve recorded just over eight inches of rain for the month, making it the tenth-wettest May on record. The record was set in 1990, at just over 11-and-a-half inches.