This image shows the 1000-500 mb thickness forecasted as of Wednesday evening. Lafayette residents are well within the bounds of the 5640m height, giving us afternoon high temperatures close to 70 degrees F for Wednesday, Thursday, and Friday.
By Saturday at 0Z (Friday, 8PM EDT), the surface low-- the remnants of Lee-- is directly over central Indiana, and cloudy weather/showers will be strongly present over northwestern Indiana. Precipitation is expected to be predominantly light, but will also be tiring in its persistance.
The other significant story will be Hurricane Katia, which is projected to move up the eastern seaboard, but never actually make landfall. Katia is projected to be just off of the coast of Nova Scotia, Canada, by Saturday evening. Its impacts on residents of the East Coast are expected to be minimal, but close attention should still be paid in the event of a sudden change in path.
With your 0-2 day forecast, I'm Paul Brandt.