Our focus now turns to the potential of record lows tonight. Many areas may wake up to thermometer readings below zero.
A Derby week tradition continues in Louisville tonight, with the festival's "Great Steamboat Race."
The race is different this year, with the loss of the Delta Queen and the Belle of Cincinnati running in its place.
The Queen is now a floating hotel in Chattanooga.
Because the Belle of Cincinnati is faster than the Belle of Louisville, the race is now more of an obstacle course.
Crews from both boats are being asked to perform a series of tasks.
The competition will include a series of contests and obstacle races.
Whichever ship gathers the most points will be declared the winner, this year receiving a set of silver elk horns.