Spaceflight Insider

Weather not favoring backup Demo-2 launch dates

Gloomy clouds linger over LC 39-A and SpaceX’s Falcon 9 rocket, Crew Dragon spacecraft at NASA’s Kennedy Space Center. Photo Credit: Theresa Cross/ Spaceflight Insider

Yesterday’s attempt to launch NASA’s and SpaceX’s Demo-2 mission to the International Space Station was plagued by weather issues that ultimately caused the attempt to be scrubbed. There remains the potential for weather complicate Saturday’s and Sunday’s launch attempts.

The weather on Florida’s Space Coast did not work out in either NASA’s or SpaceX’s favor yesterday. Through out the day, lines of showers and thunderstorms moved through the Cape. At one point during the count, a tornado warning was issued for the part of Brevard County that includes Cape Canaveral and NASA’s Kennedy Space Center. Ultimately, the weather continued to degrade during the count and the launch attempt was scrubbed.

The 45th Weather Squadron’s forecast for May 30 and 31, 2020. Photo Credit: United States Space Force.

NASA and SpaceX teams hope that the weather will be better for Saturday’s attempt. However, as of Thursday afternoon, the official weather forecast by the 45th Weather Squadron gives the weather only a 40% chance of being acceptable for launch. The weather for Sunday’s backup launch window also only has 40% chance of not violating launch constraints.

In the event that NASA and SpaceX are able to launch on Saturday or Sunday, a new launch day and window will be determined.


Patrick Attwell is a native of Houston, Texas but he currently resides in Austin, Texas where he studies accounting at Concordia University Texas. Atwell has had a passion for all things pertaining to aerospace, rocketry, and aviation. Atwell has worked to cover these fields for more than a decade. After he attended and watched the launch of NASA’s OSIRIS-REx mission it gave him what is known in the space community as “rocket fever.” Since that time, Atwell has followed his dreams and has covered events dealing with NASA’s Commercial Crew flight assignments at NASA’s Johnson Space Center and other space-related events in the Lone Star State.

Reader Comments

We will launch by Monday is my opinion

Sean Costello

With the variability of the afternoon systems, it is certainly a possibility. Heck, we almost had an acceptable window on Thursday – missed it by those key 10-15 minutes. That’s a challenge with the fuel-related instantaneous launch window.

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