A United Launch Alliance Atlas V rocket stands ready shortly before a launch attempt was scrubbed due to poor weather conditions on launch complex 41at the Cape Canaveral Air Force Station, Thursday, Dec. 3, 2015, in Cape Canaveral, Fla. Another launch attempt is set for Friday. (AP Photo/Terry Renna)
For the second day in a row, foul weather threatens to stall a critical space station delivery for NASA.
An unmanned Atlas rocket is poised to lift off at 5:33 p.m. Friday from Cape Canaveral, Florida, with 7,400 pounds of supplies for the International Space Station. Thursday's launch attempt was rained out. Forecasters say there's only a 30 percent chance the sky will clear Friday.
The six space station astronauts have gone without U.S. shipments since April. Two private companies contracted by NASA to replenish the orbiting lab are stuck on Earth with grounded rockets. Orbital ATK bought another company's rocket, the Atlas, for this supply mission.
Orbital's last grocery run ended in flames seconds after liftoff last year. SpaceX, the other supplier, suffered a launch failure in June.
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A United Launch Alliance Atlas V rocket stands ready for launch with cargo for delivery to the International Space Station on launch complex 41at the Cape Canaveral Air Force Station, Wednesday, Dec. 2, 2015, in Cape Canaveral, Fla. The last successful U.S. supply run was in April. Launch of the Atlas V is scheduled for Thursday evening. (AP Photo/John Raoux)
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A United Launch Alliance Atlas V rocket stands ready for launch with cargo for delivery to the International Space Station on launch complex 41at the Cape Canaveral Air Force Station, Wednesday, Dec. 2, 2015, in Cape Canaveral, Fla. The last successful U.S. supply run was in April. Launch of the Atlas V is scheduled for Thursday evening. (AP Photo/John Raoux)
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