Apollo 11 lifted off at 09:32 local time on a morning meteorologists had been watching for weeks. The winds were light out of the southeast. The forecast held. The Saturn V rose through air that the ERA5 archive still has on record.
The poster is drawn from the ERA5 atmospheric reanalysis at 16 Jul 1969, 13:00 UTC — the real wind speed and direction, over a region centred on Cape Kennedy, FL.
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