Prospects for an on-time liftoff hinged on the weather, with U.S. Air Force forecasters on Wednesday morning citing a 50% chance that thick clouds over eastern Florida could force a postponement.
The next launch attempt will be on Saturday.
At the time, there were no lightnings anywhere around the launch pad but the rocket basically acted like a giant conductor when it launched through the atmosphere.
Former NASA astronaut and current SpaceX consultant Garrett Reisman has previously revealed his encounters with space toilet tech were so uncomfortable astronauts often just "hold it". If they get successful they not only launch the first crewed mission from USA soil in nearly a decade but also become the privately-owned company to achieve this feat.
NASA will try again Saturday to send the Crew Dragon spacecraft to the International Space Station. McAleenan's team supervises all East Coast rocket launches and monitors the weather for NASA and SpaceX.
"We do the flight analysis assuming that the temperatures of the propellants are below a certain amount, so that we know how much performance is available to the rocket - how much margin we're going to have", SpaceX principal integration engineer John Insprucker said during Wednesday's launch webcast.
Today the US Space X human space mission was subjected to poor weather and today the human space mission had to be halted a few minutes before the launch.
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It is assumed that it was to be launched at 4.33 pm fixed time in the International Space Station.
SpaceX and NASA had to postpone their highly anticipated spaceflight as rain continuously poured around the launchpad. The first manned mission to launch from American soil since 2011 and the first commercial manned launch was called off due to storm conditions. "If we are not ready to go, we simply do not go".
Mr Hurley, 53, who also flew the US's space shuttle in its final 2011 mission, and Mr Behnken, 49, are expected to spend one to four months on the space station, with the main goal of the mission being to test the Crew Dragon's operations and safety.
Doug Hurley said in an earlier news conference: "We'll let you know how it works out".
"If we keep using American taxpayer dollars. we'll never get to the Moon and on to Mars".
President Donald Trump and Vice President Mike Pence planned to fly into Kennedy, where the guest list was exceedingly limited because of the pandemic.
"Yes, a launch delayed because of weather is disappointing and can often be confusing as everything can appear ideal", the blog said.