The SpaceX CRS-34 launch is scheduled for no earlier than 6:05 p.m. EDT on May 15, with live coverage beginning at 5:45 p.m.; Dragon is expected to dock May 17 at about 7:00 a.m. EDT.
Wednesday’s launch attempt was canceled due to anvil cloud violations at Cape Canaveral’s SLC-40, demonstrating how upper-level weather can force rapid schedule changes and cargo refresh decisions.
Mission teams prioritized cargo integrity and orbital phasing, allowing last-minute refresh of perishable items and aligning the Dragon approach for an early-morning rendezvous with the ISS.

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SpaceX CRS-34 launch now targeted no earlier than 6:05 p.m. EDT Friday, May 15, after weather delay; Dragon will dock at the ISS about 7:00 a.m. Sunday, May 17.
Launch schedule and livestream
NASA and SpaceX announced a revised liftoff window for the company’s 34th commercial resupply services mission to the International Space Station. The launch is planned for no earlier than 6:05 p.m. EDT on Friday, May 15, from Space Launch Complex 40 at Cape Canaveral.
Live coverage will begin at 5:45 p.m. on NASA+, Amazon Prime and NASA’s YouTube channel, with commentary from mission managers and engineers. Observers can follow updates through the agency’s official platforms as countdown milestones proceed.
Reason for delay and mission timing
Teams halted an earlier opportunity after meteorological checks found anvil cloud conditions that violated launch weather rules at SLC-40. The weather-related standdown occurred on Wednesday and allowed teams to reset the vehicle and payload timelines.
The revised schedule preserves the ability to refresh perishable cargo inside the Dragon spacecraft and aligns orbital phasing for a weekend rendezvous. Dragon is expected to reach the station and complete docking at about 7:00 a.m. EDT on Sunday, May 17.
Docking coverage and station operations
NASA will provide live rendezvous and docking coverage beginning at 5:30 a.m. on Sunday across NASA+, Amazon Prime and the agency’s YouTube channel. Ground teams will broadcast approach milestones as Dragon closes in on a predetermined berthing port on the ISS.
The mission will deliver supplies, scientific experiments and hardware to support crew operations and research aboard the orbital laboratory. Cargo missions like CRS-34 are integral to maintaining station cadence and enabling planned investigations.
SpaceX’s Dragon will perform automated approach and docking procedures under oversight from flight controllers in Houston and Hawthorne. Mission controllers will verify navigation data, system health and alignment before final capture and berthing operations.
Weather remains the primary variable for the remaining opportunities in the Florida range, with launch directors closely monitoring upper-level winds and cloud formations. Launch teams retain contingency plans, and any further slip would be announced with updated windows and refresh constraints.
For stakeholders, the schedule shift is manageable but requires coordination for receiving teams at the station and for downstream science timelines. The next steps will focus on prelaunch checkouts, final cargo refreshes and real-time weather assessments ahead of Friday’s evening window.
Watchfulness on launch-day weather, real-time telemetry, and successful approach milestones will determine whether CRS-34 proceeds as planned. If the launch and docking unfold on schedule, the mission will sustain ISS operations through its planned cargo transfer and return activities.

