UPDATE – 4/21/2013 4:10pm Eastern. Fueling has begun. Weather delays from the past two attempts do not look like they will happen today. Weather is good. So far all systems are a GO. NASA TV coverage starts at 4:30pm for a launch window of 5:00 to 8:00.
Launch scrubbed again on April 20th due to weather. Upper level winds are unusually strong, and currently exceed safety
restrictions. Launch is now scheduled for Sunday April 21th 5:00pm – 8:00pm eastern.
The launch of the first Antares Rocket from the new Wallops launch facility was scrubbed approximately 12 minutes before launch when a second stage umbilical connection had a premature separation. The next attempt will be on Friday, April 19 with a launch window between 5 and 8pm eastern.
The backup launch days are April 20 – 21. You can watch the launch live on NASA TV. Coverage begins at 4 p.m. on NASA TV on launch day.
As reported earlier this launch can be seen from much of the north eastern United States.