Scrubbed for the 4th time!

Weather pushes Space Shuttle Endeavour launch to Monday, July 13.

Once again the launch of space shuttle Endeavor has been postponed to another day. On Sunday, the launch was delayed because of the weather, and for me personally it’s more disappointing than a mechanical problem. You have no control over the weather and all that’s keeping you from launching is a few clouds and lightening. 

I was very disappointed, but I am sure the STS-127 team is devastated. They were about 20 minutes away from the launch. Closer than they have been so far in this on again, off again mission. The team will remain in quarantine at the Kennedy Space Center for another launch attempt tomorrow.

My brother, Mason, and I are back in Austin,Texas, home of Astronaut Tim Kopra, who is part of STS-127. We were in Florida at the Kennedy Space Center in June for the first two attempts to launch the shuttle.The first two delays were for mechanical reasons.

In Austin, we attended a launch watching party put together by Tim's family and friends. We had the live launch coverage on every TV and anxiously waited to see the blast off. With the launch less than 20 miutes away, we heard NASA officials declare it a "no go." NASA will try again tomorrow evening. Every day that Endeavour doesn’t launch, you subtract 20 minutes from the launch time. So tomorrow the launch will be 6:51 p.m. ET. NASA can launch the shuttle until Tuesday, July 14.

If you're wondering why the shuttle has to launch at strange times like 6:51 p.m. and why NASA moves the time up by 20 minutes every day, it's because the shuttle has a very small launch window to put it into the right orbit to rendezvous with the space station.

Follow us tomorrow on Twitter as we will once again cover the  the long anticipated launch of Endeavour and mission STS-127.

—Bailey Pownall

PHOTO: Storm clouds roll in over the NASA Vehicle Assembly building and Launch Control Center moments after Space Shuttle Launch Director Pete Nickolenko called the launch a "No Go" due to weather conditions. Image credit: NASA/Bill Ingalls