SpaceX is scheduled to launch a Falcon 9 rocket Sunday night from Cape Canveral to the International Space Station.
Atop the rocket sits a Dragon capsule packed with cargo for the space station and a small communications satellite.
[FLASHBACK VIDEO: SpaceX makes historic launch to ISS (5/22/12)]
As of Friday, there was a 60 percent chance of weather good enough to allow a to blast off, which is scheduled for 8:35 p.m. Sunday. The launch will be streamed live on ClickOrlando.com.
A weak frontal boundary moving slowly through the Florida peninsula could produce thick clouds and scattered showers Sunday evening. The launch window is instantaneous, Local 6 News partner Florida Today reported.
If the launch should delay for a day or two, the forecast is excellent Monday and Tuesday, with an 80 percent chance of favorable conditions both days.
The space station resupply mission is the first of 12 SpaceX plans to fly under a $1.6 billion NASA contract.
Flying as a secondary payload is the first in a new generation of satellites being fielded by New Jersey-based Orbcomm.
Watch Local 6 News for more on this story.