Artemis II Launch: NASA's Strict Weather 'Go/No-Go' Checklist

NASA adheres to a strict 'Go/No-Go' checklist for the Artemis II mission, with specific weather criteria significantly influencing launch decisions.

Essential Safety Protocols

Safety protocols dictate that the Space Launch System (SLS) rocket cannot launch through rain or smoke plumes. These prohibitions are critical for maintaining the integrity and safety of the mission from the outset.

Wind Speed Limitations

Wind speed requirements include peak liftoff winds remaining below 33 to 45 mph across various altitudes up to 457.5 feet. Adhering to these limits ensures stability and control during the crucial initial moments of ascent.

Temperature Regulations

Temperature regulations require readings above 41.4°F at all times and below 94.5°F for periods longer than 30 minutes, measured at two heights above the pad. This ensures components and propellants remain within their operational limits, safeguarding the rocket's systems.

Lightning Criteria

Lightning criteria prevent launch if strikes are detected within 10 nautical miles of the flight path. A 30-minute clear window is required before a launch can be considered, ensuring no immediate electrical threats.

Cloud Rules

Cloud rules prohibit launching through thick cloud layers exceeding 4,500 feet that reach freezing temperatures. Launch is also prohibited near thunderstorm debris or disturbed weather clouds capable of generating lightning, prioritizing safety from atmospheric electrical hazards.

Solar Activity

Severe solar activity, which could impact electronics or radio communication, is also a factor that can delay launch. This precaution is essential to protect the mission's sensitive systems and communication capabilities.