The tournament's unique scheduling means the men's singles semi-finals and women's singles final are played on the same day, leaving little leeway for bad weather.
And conditions at the scheduled start time of 11am could hardly have been worse, with Flushing Meadows caught in the middle of a severe storm, with a tornado warning for the area.
Bad weather has blighted the tournament in recent years and there was a real possibility of the men's final being delayed until Monday for the fifth successive year.
Murray was due to be on court first for his semi-final against Tomas Berdych, to be followed by defending champion Novak Djokovic and David Ferrer before the women's final between Serena Williams and Victoria Azarenka this evening.
Another possibility would be to move Murray's match from Arthur Ashe Stadium to Louis Armstrong and play both semi-finals at the same time, an option that certainly would not please the Scot who has struggled on Flushing Meadows' second court.
The storm cleared relatively quickly, allowing the groundstaff to begin the lengthy drying process, and it was confirmed Murray and Berdych would play on Ashe.
The pair walked on court at 12.15pm local time in dry conditions, although the strong wind was certain to make life difficult for both players.
It was thought there would be a window of around five hours with the forecast for the women's final later looking decidedly dodgy.