Artemis II: How the weather will be a crucial factor in the launch

The weather rules include atmospheric electricity, types of cloud, specifically cumulus and disturbed weather like rain or strong winds.

Using a percentage chance of a violation of the rules, launch weather officers use a combination of meteorological and climatological data, local knowledge, and experience to forecast this probability.

Lightning is one of the biggest risks, but it is not only the natural lightning from a thunderstorm – or cumulonimbus cloud – that forecasters will be concerned about.

Rocket-induced lightning from an enhanced atmospheric electric field is also a major risk.

“Some types of clouds, even if they’re not producing lightning, carry an electrical charge where a rocket passing through them at high speeds with a trail of exhaust can act like a lightning rod and trigger a lightning strike,” said Burger.

This rocket-induced lightning can be triggered much more easily than natural lightning.

Other events, external such as heavy rain, strong winds, high or low temperatures or extreme weather can also jeapordise a rocket launch.

Throughout a countdown the launch weather officer must be clear and convinced that none of the weather criteria are violated in order to give the weather ‘go’ call for launch.

Ahead of the Artemis launch window, the 45th Weather Squadron will not only be looking at conditions at Cape Canaveral but also in other areas such as potential recovery sites in the North Atlantic where “the weather is not particularly favourable at this time of year” in case things go wrong.

With the peak in the solar cycle, they will also be keeping an eye on solar activity and enhanced radiation which could affect the astronauts.