well, all right then

From the marathon website:

Country Music Marathon & 1/2 Marathon Weather Contingency Plan:

After consultation with all the involved city authorities, due to the weather forecast in the Nashville area which is projecting severe afternoon storms, the MARATHON will most likely be subject to an abbreviated timeline.

At this time, there is a contingency plan to limit the marathon to 4:30 and under*. Any runner who is behind this pace (10:20 per mile) at mile 11.2 will be directed to complete the half marathon course. This timeline may change based on what actual race day weather pattern.

While we know that this will be a disappointment to some (as it is to us); if implemented, this plan is in the best interests and safety of all involved, especially the participants and volunteers. Thank you for your understanding and cooperation.

*Time based on chip time, not gun time.