( CNN ) -- Early data shows space shuttle Atlantis , poised for launch Friday , escaped damage from two lightning strikes Thursday afternoon , NASA said . One bolt emanating from a severe thunderstorm struck a water tower 515 feet from the pad ; the second struck the beach nearby , the space agency said in a statement . Currently , the launch time of 11:26 a.m. Friday remains unchanged , despite only a 30 % chance of favorable weather , according to NASA . Fueling was scheduled to start at 2:01 a.m. Friday . Ahead of that , engineers will determine whether the lightning affected systems , the external tank , main engines or other components . Atlantis is poised to perform the last mission of the 30-year-old shuttle program . On board will be a four-person , veteran crew of astronauts , headed to the international space station with a load of supplies .
Friday : NASA finds no shelter after lightning strikes . Weather looks iffy for Friday morning 's scheduled launch . Atlantis will be the last shuttle to land .