From NASA:

"Because of weather conditions that violated the rules for launching, SpaceX has postponed its planned launch of its Falcon 9 rocket carrying the Dragon spacecraft. It is SpaceX's sixth commercial resupply services mission to the International Space Station.

"The next launch opportunity is Tuesday, April 14, at 4:10:40 p.m. EDT. Our continuous launch coverage will begin at 3 p.m. ...

"As for tomorrow's forecast, it's slightly worse tomorrow with forecasters predicting a 50 percent chance of acceptable conditions."

For the live stream of the Falcon 9 launch and landing, click here.

For more information about what the Dragon resupply shipment contains, click here.