So sure are forecasters of risky weather that Augusta National announced that there will be no Green Jacket ceremony on the terrace putting green in order to expedite gate closures and get people off the course.
Although it is the first major Woods has won starting a final round behind the lead, he showed his once-dominant self when he took the outright lead with a two-putt birdie on the par-5 15th and never looked back.
Francesco Molinari gives an honest assessment of his performance, and speaks about Tigers' 2019 Masters win.
Woods parred 17 and walked up to the 18 green to crowds 20-people deep applauding with delight, but he kept a stoic visage until the job was complete, a tap-in for bogey followed by a fist pump and a scream of joy in celebration of a fairytale fightback like few others in sporting history.
Sunday's victory by Tiger was massive in more ways than one. "My dad was here in 1997 and now I'm the dad with two kids there".
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Due to an ominous weather forecast, golfers will go off from the first and 10th tees in threesomes and Koepka will be followed around the course by the final grouping of Molinari, Tiger Woods and Tony Finau.
They will tee off at 9:20 am ET (1320 GMT) as officials pushed up start times in a desperate bid to get the season's first major across the finish line before storms hit.
Paired together in the final round of last year's British Open, won by the Italian at Carnoustie, Molinari and Woods found themselves in the last group again battling for a major title. But on Sunday it was Molinari who slipped up, with the 36-year-old from Turin finding the water at the 12th and 15th.
Koepka has said all week he was focused on his own game and not worrying about what anyone else is doing, but that could prove tough come Sunday with the leaders playing right behind him.