Launch Moves to Sunday: Forecast 40 Percent ‘Go’

The launch of Orbital ATK’s Cygnus cargo spacecraft to the International Space Station has moved to Sunday at 4:44 p.m. EST, the start of a 30-minute launch window for the uncrewed spacecraft to begin it mission. Countdown and launch coverage will begin on NASA’s Launch Blog and on NASA TV at 3:45 p.m.

Saturday’s attempt was called off because of high winds that were expected to violate launch criteria throughout the 30-minute launch window. The weather forecast for Sunday improved to a 40 percent chance of acceptable conditions at launch time.

For background information on the mission, visit To join the online conversation about the Orbital ATK CRS-4 launch and the International Space Station on Twitter, follow @Space_Station and #Cygnus.

The United Launch Alliance Atlas V rocket set to launch the Orbital ATK Cygnus spacecraft to the International Space Station is in place at Space Launch Complex 41

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