All eyes on the sky for Chevron Houston Marathon - Houston weather, traffic, news | FOX 26 | MyFoxHouston

With the Chevron Houston Marathon this weekend, everyone is keeping an eye on the weather.

Organizers say they doubt rain will stop the estimated 13,000 runners from taking part in the 26-mile run or the 12,000 others running in the half marathon.

It could affect the 250,000 spectators.

Running favorite Meb Keflezighi will be on the sidelines, but it's not the rain stopping the 2004 Olympic medalist.  He's recovering from the flu.