NASA Artemis II: Weather conditions needed for launch explained
By Andrea Torres
Published on April 1, 2026.
NASA's launch weather team is monitoring conditions for Artemis II launch from the Kennedy Space Center in Cape Canaveral, Florida. The launch director will decide if the launch is ready to proceed if the lightning forecast is greater than 10%, if there is a greater than a 5% chance of hail, or if temperature is less than 40 degrees or exceeds 95 degrees. Launching cannot occur if the peak liftoff winds exceed a range of 29 knots through 39 knots. The 24-hour average temperature at both 132.5 feet and 257.5 ft is less over 41.4 degrees, or exceeds 94.5 degrees for 30 consecutive minutes. Do not launch if the flight path is within 10 nautical miles of a detached thunderstorm anvil cloud for 3 hours, unless specified conditions related to cloud distance and surface electrical fields can be met.
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