Ultimately, the outcome was never in doubt.
Rain is no stranger to the British Open.
Westwood registered his 12th top-five finish in a major, but is still yet to win one as he slipped back from 10-under after 10 holes.
"But look I hope I am going to be able to deal with it better". I could not believe it was happening to me.
But it was the players who actually had to endure the worst of the inclement conditions while trying to do their best at their jobs.
Lowry knew the Claret Jug was his.
"I just didn't make anything".
Lowry closed with a 1-over 72, the first time since 1996 the Open champion was over par in the final round, and it was no less impressive. The wind was blowing strong, too, breaking umbrellas and forcing many a player into some tricky shots out of the rough brush that line the thin fairways. Conditions were so rugged that no one from the last 12 groups that teed off in the final round broke par.More news: Voting begins in Japan's upper house election World 06:48
What started as a four-shot lead for Lowry could've been reduced to one in a flash.
His smile got wider with every hole coming in. "I kept telling him how nervous I was, how scared I was, how much I didn't want to mess it up".
"I think the players got sunshine, they got flat calm, they got a bit of breeze from different directions and they got a little Portrush Armageddon", said McDowell, who shot a 77 and finished 4 over.
Lowry was cheered on by fans from all over the island and says many friends made the last-minute trip from the Republic of Ireland to see him when it became clear he would be leading in the final round.
But he was left to rue a series of missed chances early on to put pressure on the Irishman. Lowry's inability to convert on that 54-hole lead left some damage that needed repairing over time, and by his own account it's been a building block for the confidence and form he carried to Portrush this week. "Them first few holes, when you start four back are pretty crucial". He shot 74 and tied for fourth.
The British Open had only been played once outside of Scotland and England in all its years, when it was at Royal Portrush in 1951.
'It was great to have him behind the 18th green.
And then along came Lowry, who teamed with McIlroy to bring Irish golf a European Amateur title in 2007, and who won the Irish Open as an amateur 10 years ago.More news: Tesla's next-gen V3 Supercharger can charge 1,500 EVs a day
'That just shows how fickle golf is, ' Lowry added.
"My mum and dad, they sacrificed so much for me when I was younger and I'm so happy I can hand them this trophy tonight", Lowry said as he clutched the Claret Jug, his voice cracking with emotion.
"It was just so hard", he said.
However, the world number 20 was also struggling and when a six at the par-four 14th for Fleetwood was followed by Lowry's birdie at 15 there was only one victor.
And then he held on.
J.B. Holmes, in the penultimate pairing, shot 87. He hit his first tee shot out-of-bounds.
"Hopefully we can get back soon".More news: Death Toll Rises to 12 from Central China Gas Factory Blast