NASA is preparing to launch Artemis II, the first crewed mission to orbit the Moon in more than 50 years, but weather conditions could determine whether the historic mission proceeds as planned.
The launch window from Cape Canaveral, Florida, is scheduled to open on April 1 at 18:24 EDT and will remain open for two hours. However, NASA meteorologists are closely monitoring several weather risks that could force a last-minute delay or “scrub” of the launch.
The Artemis II rocket carries nearly 750,000 gallons of propellant, making lightning one of the most serious safety concerns during liftoff.
Forecasters are watching for several potential hazards including cumulus cloud development, showers, strong winds, and even increased solar activity. In Florida, the arrival of warmer spring temperatures combined with moisture from the Atlantic Ocean is creating conditions that can quickly produce large cumulus clouds capable of generating thunderstorms.
NASA’s latest forecast suggests there is about an 80 percent chance of favorable weather during the launch window. If conditions deteriorate, backup launch opportunities are scheduled between April 2 and April 6.
Rocket launches are governed by strict weather safety rules that must be satisfied before a mission can proceed. These rules include limits on cloud types, atmospheric electricity, rainfall, wind speed, and temperature.
Weather forecasts for the launch are provided by the US Space Force’s 45th Weather Squadron. Mark Burger, the primary launch weather officer for Artemis II, said the team’s role is to ensure it is meteorologically safe for the rocket to lift off.
Historically, weather has been one of the main causes of launch delays. Nearly half of all rocket launches that are scrubbed are cancelled due to unsafe weather conditions.
Lightning remains the biggest threat, but it is not only natural lightning from thunderstorms that concerns launch officials. Rockets themselves can trigger lightning if they pass through electrically charged clouds.
Burger explained that certain cloud formations carry strong electrical charges even when lightning is not visible. When a rocket travels through these clouds at high speed, its exhaust plume can act like a lightning rod, triggering what is known as rocket-induced lightning.
Because of this risk, launch weather officers must ensure that no atmospheric electrical hazards exist along the rocket’s path before giving the final approval to proceed.
Beyond thunderstorms and lightning, other conditions such as heavy rain, strong winds, or extreme temperatures could also threaten the launch.
Weather teams are also monitoring conditions far beyond Florida. In case of an emergency during the mission, potential recovery zones in the North Atlantic must also have safe weather conditions.
Solar activity is another factor under observation. With the Sun currently near the peak of its solar cycle, increased radiation or solar storms could pose additional risks to astronauts during the mission.
Preparations for the Artemis II launch have been ongoing for months. In February, extremely cold weather forced NASA to postpone a full rehearsal of the launch process because temperatures were too low to safely fuel the Space Launch System rocket.
Now that the rocket is fully assembled on the launch pad, it remains exposed to the elements, requiring constant monitoring from meteorologists.
Burger said the planning process for the mission began long before the rocket reached the launch pad and involves far more complex weather considerations than most space launches.
Despite the challenges, he said being part of the mission is a lifelong dream and a historic opportunity.
If the launch proceeds as planned, Artemis II will mark the first crewed journey around the Moon since the Apollo program ended in the 1970s, representing a major step toward NASA’s long-term goal of returning humans to the lunar surface and eventually sending astronauts to Mars.