Orbital ATK has announced Sunday’s launch will be pushed to Monday.

According to an email from Keith Kohler with the Wallops Flight Facility, Orbital ATK in conjunction with NASA, has moved the Antares and Cygnus launch to NET Monday, May 21st at 4:39 a.m. EDT to support further pre-launch inspections and more favorable weather conditions.  Monday shows an 80% probability of acceptable weather for launch.