Roswell, New Mexico (CNN) -- A skydiver's historic free-fall from the edge of space was put on hold Tuesday morning amid concerns about the weather, raising the possibility that it could be put off to another day.
The winds early Tuesday morning were moving at about 18 mph where the top of Baumgartner's balloon would be. Organizers want the winds to calm to 5 mph or lower before the jump.
There is a three-hour window in which to launch -- from 6:30 a.m. to 9:30 a.m. local time in Roswell, or 8:30 a.m. - 11:30 a.m. ET.