Launch of the Orbital ATK CRS-4 mission to the International Space Station is scheduled for 4:44 p.m. EST. The updated forecast from the Air Force’s 45th Weather Squadron still predicts a 40 percent chance of favorable weather for liftoff of the Atlas V rocket and Orbital ATK Cygnus spacecraft from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida.
Launch managers deferred a Saturday launch opportunity due to high wind conditions at the launch site. A launch opportunity on Monday would offer a 70 percent chance of favorable weather. The detailed weather forecast is below, after the launch countdown highlights. Continuous coverage and of the countdown, launch and ascent of Cygnus will begin at 3:45 p.m. here on the NASA Blog and on NASA Television which also can be seen online at https://www.nasa.gov/nasatv.
A launch today would result in a rendezvous at the station and grapple and berthing of Cygnus on Wednesday, Dec. 9.