Sally Ride became the first American woman in space 42 years ago today. Here's how weather played a role then and now.

Boston Globe

18-06-2025

For the launch to be successful, the weather had to be near perfect, and the east coast of Central Florida was basking in amazing conditions that morning. Liftoff commenced without delay with temperatures in the low 70s and near-still wind.
This NASA file photo dated June 1983 shows America's first woman astronaut Sally Ride, as she communicates with ground controllers from the flight deck during the six-day space mission of the Challenger. Ride, the first US woman to fly in space, died on July 23, 2012 after a 17-month battle with pancreatic cancer. She was 61.
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But bad weather in Florida upon return to Earth June 24, 1983, forced Challenger to land three time zones away at Edwards Air Force Base, Calif., in the Mojave desert, where still conditions were certain, especially for a powerless glider that depended on a stable atmosphere to land comfortably. The base also provided very wide runways for a smooth Challenger landing.
Sally Ride and STS-7 returns safely in California after bad weather in Florida changed the landing location.
NASA
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NASA has strict parameters in place when it comes to weather to 'greenlight' a launch — most of which are obvious.
Wind speed and direction need to be light and steady. High winds of 30 miles per hour or more will usually scrap flight plans for the day, and any sudden changes in wind direction may cause issues as the rocket moves vertically through the atmosphere.
(Back when Sally Ride was breaking barriers in the Space Shuttle program, launches were delayed or canceled when wind speeds were as low as 22 miles per hour.)
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High visibility with little to no cloud cover is also necessary. Any instability in the atmosphere, albeit minor, can cause lightning when a rocket burning copious amounts of fuel at extreme temperatures blasts through. Apollo 12 was struck by lightning twice during liftoff on Nov. 14, 1969, because of its heat production. Essentially, the rocket's exhaust system acted as a lightning rod and sparked lightning with already-lifting air from a nearby cold front.
Temperatures and humidity both play critical roles in NASA rocket launches, as everything from the structural integrity and rocket performance can be impacted by weather conditions. Fuel, insulation, wiring, and other components can expand, contract, or break down if weather conditions aren't ideal.
Many will remember the Challenger's last trip on Jan. 28, 1986, when air temperatures were 36 degrees, approximately 15 degrees colder than any other shuttle launch, causing the O-ring seal to become brittle and ultimately fail, leading to a catastrophic explosion. All
Weather continues to play a critical role in NASA's strict 'launch commit criteria,' and if anything is near or outside the safe range, the launch is delayed or scrubbed for another day.
Here's a look at an example weather checklist when considering safe conditions to launch.
An example of the weather checklist utilized to proceed or delay a rocket launch at Cape Canaveral.
NASA
Ken Mahan can be reached at