Ahead of an advancing cold front we'll have a warm and humid air mass, in which, we could see a few hit-or-miss showers and storms. However, the best chance of rain will be late tonight as the front travels through Kentuckiana.
The map below shows the front moving in around 1am, but showers and storms will be forming out ahead of it.
The next map shows the amount of rain expected through early Tuesday morning. Since the rain will be scattered, many areas will see less than 1/2" of rainfall, however if you get caught under any heavy downpour for longer 1/2 - 1" of rainfall is possible. Most of the rain will taper off before sunrise Tuesday morning. A few storms could fire back up during the heat-of-the-day Tuesday afternoon off to the southeast as the cold front exits the area. The heaviest rains over the next 24 hours will likely be well to our southeast, and southwest.