Bad Weather Delays Space Shuttle Launch

NASA had to stop the launches after lightning and cumulus clouds appeared, because their appearance violates emergency landing guidelines. Cumulus clouds are associated with dangerous weather conditions, such as tornadoes.

On Friday July 10, lightning struck within a half mile of the launch pad at Cape Canaveral, Florida at least 11 times. After the mast of the launch pad was struck by lightning, NASA canceled Saturday's launch so Endeavour's electrical systems could be checked.

Two attempted launches in June were canceled because of hydrogen leaks. NASA says that problem has been fixed.

NASA will try for another launch on Monday, June 13 at 6:51 PM. However, meteorologists say that the chance of good weather is only 60%.

The space shuttle is scheduled to bring seven astronauts to the International Space Station (ISS) for a mission that will last 16 days. They will install a platform on the ISS that will allow experiments to be conducted in space. The Endeavour will also be carrying replacement batteries for the solar powered ISS as well as spare parts for the station.

The space shuttle fleet will be retired in 2010.