But it's unlikely that a new launch date will be set until the rollback decision has been made.

"The agency is taking a step-wise approach to its decision making process to allow the agency to protect its employees by completing a safe roll in time for them to address the needs of their families while also protecting for the option to press ahead with another launch opportunity in the current window if weather predictions improve," according to a NASA release.

Concerns over the weather system forming in the Caribbean put the weather conditions at only 20% favorable for a launch, according to a forecast released by the US Space Force on Friday.

Constraints on the launch require that the Artemis I mission does not fly through any precipitation.

The launch constraints are designed to avoid natural and rocket-triggered lightning strikes to in-flight rockets, which could cause damage to the rocket and endanger public safety, according to the Space Force.

Rocket-triggered lightning forms when a large rocket flies through a strong enough atmospheric electric field, so a cloud that is not producing natural lightning could still cause rocket-triggered lightning, according to the Space Force.