At T-25 minutes, the United Launch Alliance Atlas V rocket at Cape Canaveral Air Force Station's Space Launch Complex 41 is fully fueled and ready to launch NASA's Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft. Liftoff is planned for the opening of a two-hour window at 1:28 p.m. EST.
As a weather system moves into the area from the northwest, electrical potential in the area has been toggling between acceptable limits on a field mill instrument. A field mill is a specialized instrument used for measuring the strength of electrical fields in the atmosphere near thunderstorm clouds. At this time all the field mills are green.