( CNN ) -- The space shuttle Discovery was waved off from its first chance to land Friday afternoon because of unstable weather near Kennedy Space Center in Florida , NASA said . The space shuttle 's landing in Florida was delayed Thursday , shown . A first attempt Friday was called off , too . The shuttle will make another orbit of Earth , while NASA mission managers watch to see if extreme moisture and lightning threaten a safe landing . The next opportunity to land in Florida would come at 7:23 p.m . ET ; however , Mission Control told the shuttle crew the forecast for that time `` looks about the same . '' Crews have been activated at Edwards Air Force Base in California 's Mojave Desert in case NASA decides to land the shuttle there , where the weather is not considered an issue . There are two chances to land Friday evening in California . The space agency , however , usually exhausts all landing windows in Florida before sending the spacecraft to California . A landing on the West Coast adds a week to the turnaround time before the shuttle can be ready for another mission and it costs several million dollars . The landing could be delayed until Saturday when there are two more chances to land in Florida or California . Discovery initially was scheduled to return to Earth on Thursday , but poor weather in central Florida also forced a delay . The seven astronauts are wrapping up a 13-day mission to the international space station , where the crew made repairs and delivered supplies . The crew executed three spacewalks and dropped off a Combined Operational Load Bearing External Resistance Treadmill , or Colbert treadmill . It was named after comedian Stephen Colbert . Weather and technical problems delayed Discovery 's launch three times before blastoff .
Launch attempt for space was called off because of bad weather . The shuttle may attempt a landing in California later today . Plans to land on Thursday also were called off because of bad weather . NASA is readying launch in the California area as a backup plan .