( CNN ) -- A powerful storm including a lightning strike in the launch pad area caused minor damage to the space shuttle Endeavour , a NASA official said Thursday . Continuing bad weather has prevented further inspection of the shuttle scheduled to launch on its final mission on April 19 , said Allard Beutel , a spokesman at NASA 's Kennedy Space Center . The storm Wednesday included a wind gust of 90 miles per hour at launch pad 39A , as well as a lightning strike `` inside the pad perimeter , '' Beutel said . `` We did n't take a direct strike on the pad , '' Beutel said . `` Anytime you get that much electricity inside the perimeter you have to check things . '' NASA officials so far know of minor damage to insulation foam at the top of the shuttle 's external fuel tank , according to Beutel , who said a full assessment of damage wo n't be possible until further inspections take place . NASA says the storm that included high winds , lightning and hail blew in at about 5:20 p.m. Wednesday . `` No one was injured and initially no obvious damage was observed . The storm moved through the area quickly , '' said a NASA news release Wednesday . Endeavour is scheduled to blast off to the International Space Station on April 19 . The space shuttle 's six astronauts are at the Kennedy Space Center for their launch dress rehearsal .
NEW : NASA official says the storm caused minor damage to Endeavour . The storm blew in at about 5:20 p.m. Wednesday . Space shuttle Endeavour is scheduled to launch on April 19 for its final flight .