KENNEDY SPACE CENTER, Florida (CNN) -- NASA began preparing for a launch of space shuttle Endeavour on Sunday, a day after liftoff was postponed over concerns of possible effects from a lightning storm.
External tank fueling began just before 10 a.m. Sunday, with a planned launch time of 7:13 p.m., NASA said.
"The forecast is 70 percent 'go' for liftoff," the space agency said on its Web site.
Endeavour had been scheduled to take off at 7:39 p.m. Saturday.
Eleven lightning strikes hit within a half-mile of the launch pad Friday night, Mike Moses, the space shuttle program integration manager, told reporters Saturday.