In high bay 3 of the Vehicle Assembly Building, the orbiter Atlantis has been lowered onto the mobile launcher platform below for mating. Poor weather has prevented the shuttle’s rollout to the launch pad. Credit: NASA.

Mother Nature is not cooperating with NASA’s plans to haul the space shuttle Atlantis to its Kennedy Space Center (KSC) launch pad in Cape Canaveral, Florida.

For the second day in a row, poor weather has again thwarted the shuttle’s 4.2-mile trek to KSC’s Launch Pad 39B, where the orbiter is slated to rocket toward the International Space Station (ISS) with its six-astronaut STS-115 crew. One of NASA’s massive crawler carriers was scheduled to haul Atlantis and its external tank-solid rocket booster launch stack to Pad 39B at 10:00 p.m. EDT (0200 Aug. 1 GMT).

KSC spokesperson Tracy Young said in a recorded update - yes, NASA has those - that the move will now take place no earlier than 2:00 a.m. EDT (0600 GMT) on Wednesday.

Commanded by veteran shuttle astronaut Brent Jett, Atlantis’ STS-115 mission will deliver a new set of solar arrays and truss segments to the ISS in the first major construction flight to the orbital lab since late 2002. The spaceflight’s launch window stretches from Aug. 27 through Sept. 13, though NASA hopes to launch Atlantis by Sept. 7 to allow a Russian Soyuz to ferry a new ISS crew to the station on Sept. 14.