Earlier I said I'm no meteorologist - here's a man who is. BBC Weather's Darren Bett has the latest from Augusta...

Iain Carter
BBC Sport golf correspondent at Augusta National

Thunderstorms are forecast to come in so it is a race against time. Thousands of spectators lined the pavement of the roads into the Augusta National this morning.

We’ve never seen the like of this before where the organisers have said 'let’s settle the Masters on a Sunday morning rather than the afternoon'.

The players at the top of the field are starting on the front nine and the back markers on the back nine, so Rory McIlroy has the ignominy of starting on the back nine rather than the front nine.

So to be clear, as per that last entry from Peter, you will see this (minus Sergio)...

Image source, Getty Images

But you'll not be seeing this...

Image source, Getty Images

Peter Scrivener
BBC Sport at Augusta National

The Masters prides itself on its traditions. Tuesday's champions' dinner. Wednesday's par-three contest. Thursday's ceremonial tee-off. Sunday's Green Jacket presentation...

This year, there will be a slight change to proceedings. Don't fret you fans of the Butler Cabin - the presentation there will still be taking place.

However, there will not be a Green Jacket ceremony on the terrace putting green in front of the patrons.

This is in order to "expedite gate closures" - i.e. get the patrons off the course before the storm hits.

I'm no meteorologist but it ain't good when a weather map looks like a Jackson Pollock painting...

Another man out on the course is England's Matt Fitzpatrick. After an opening 78, the Sheffielder has carded 67 and 68 to move into the red.

The only downside for the Sheffield United fan is that his caddie Billy Foster is a Leeds United supporter.

Both football teams are going for promotion to the Premier League - yesterday Fitzpatrick's team lost ground on Foster's in the race.

Bet the convo over dinner was fun for Fitzy...

Those out on the course are already battling a wind which will put at least one more on their club selection.

Out of the dozen or so under way, only one man has sunk a birdie - Patton Kizzire.

The 33-year-old American, who missed the cut on his only previous Augusta appearance last year, starts with a tweet tweet to move four under.

12:30-19:25 - Live coverage from featured groups, Connected TV and online

12:40-18:30 - Amen Corner, Connected TV and online

12:40-19:00 - 15 & 16 live, Connected TV and online

13:00-16:00 & 18:30-19:30 - Live commentary, BBC Radio 5 Live Sports Extra

13:55-19:25 - Final round live on BBC Two (additional live coverage on BBC Red Button)

16:00-19:30 - Live commentary, BBC Radio 5 Live Sports Extra

21:00-22:30 - The Cut, BBC Radio 5 Live

As well as following our words of, ahem, wisdom, you have plenty of options to follow the Masters today.

Which means even that Sunday afternoon trip to the tip which you've been putting off for weeks won't get in the way...

Peter Scrivener
BBC Sport at Augusta National

It was still dark when we left the BBC house this morning. I've been sharing with Radio 5 Live commentator Iain Carter among others.

They are preparing to go on air from 13:00 BST.

Outside the media centre there is a huge amount of activity on the range. The floodlights are on because it's still not quite full light yet, and there is a thick layer of cloud.

The leaders never expect to be up and at the course this early on a Sunday.

I can just about make out Francesco Molinari in a bunker. He's moved from practicing chips around the green to sand saves.

Tiger is a sensible chap. The sort who would bring cheese and coleslaw sandwiches for a long car journey.

Perhaps this is why he knew he'd have to get up before the roosters...

From 10th tee:

12:30: Kyle Stanley, (a) Viktor Hovland (Nor), Charley Hoffman

12:41: Kevin Kisner, Bryson DeChambeau, (a) Takumi Kanaya (Jpn)

12:52: Rory McIlroy (NI), Keegan Bradley, Gary Woodland

13:03: Jimmy Walker, J.B. Holmes, Charles Howell

13:14: Kiradech Aphibarnrat (Tha), Kevin Na, (a) Alvaro Ortiz (Mex)

13:25: Patrick Reed, (a) Devon Bling, Keith Mitchell

13:36: Tyrrell Hatton, Satoshi Kodaira (Jpn), Andrew Landry

13:47: Bernhard Langer (Ger), Rafael Cabrera Bello (Spa), Eddie Pepperell (Eng)

13:58: Branden Grace (SA), Martin Kaymer (Ger), Li Haotong (Chn)

14:09: Emiliano Grillo (Arg), Zach Johnson, Billy Horschel

14:20: Trevor Immelman (SA), Alex Noren (Swe)

As we've explained there are groups teeing off simultaneously from the first and the 10th tees.

From 1st tee:

12:30: Aaron Wise, Marc Leishman (Aus), Kim Si-woo (Kor)

12:41: Matthew Fitzpatrick (Eng), Kevin Tway, Patton Kizzire

12:52: Henrik Stenson (Swe), Hideki Matsuyama (Jpn), Cameron Smith (Aus)

13:03: Jordan Spieth, Tommy Fleetwood (Eng), Corey Conners (Can)

13:14: Jason Day (Aus), Bubba Watson, Lucas Bjerregaard (Den)

13:25: Justin Thomas, Phil Mickelson, Jon Rahm (Spa)

13:36: Adam Scott (Aus), Patrick Cantlay, Thorbjorn Olesen (Den)

13:47: Louis Oosthuizen (SA), Dustin Johnson, Rickie Fowler

13:58: Matt Kuchar, Justin Harding (SA), Xander Schauffele

14:09: Brooks Koepka (USA), Webb Simpson (USA), Ian Poulter (Eng)

14:20: Francesco Molinari (Ita), Tony Finau, Tiger Woods

If Tiger was up at 4am, then goodness knows what time the early starters - who have just kicked off - were up. Strong flat whites all round...

Image source, Getty Images

Tiger Woods, trying to win his first major title since the 2008 US Open, will tee off alongside Francesco Molinari and Tony Finau in the last threesome at 14:20 BST.

So the 14-time major winner said he would get up "around 03:45 or 04:00" local time to prepare for his 09:20 start.

"Usually the reward for playing hard and doing all the things correctly, you get a nice little sleep-in come Sunday, but that's not the case," Woods said.

"We've got to get up early and get after it. It will be interesting to see if that wind comes up like it's forecast - 15-20mph around this golf course is going to be testy."

So here's the plan:

• All players going out in threes instead of the usual twos
• Groups starting simultaneously on the first and 10th tees
• Everything to get done and dusted before Augusta turns into a scene from Twister*

* The thunderstorm won't be quite that bad

Frankie Molinari. Tiger Woods. Tony Finau. Brooks Koepka. Webb Simpson. Ian Poulter.

If cheap Danish lagers did Masters leaderboards going into the final day...

And then there is Dustin Johnson, Adam Scott, Rickie Fowler, Louis Oosthuizen all lurking in the slipstream...

Peter Scrivener
BBC Sport at Augusta National

No Masters champion has posted fewer than five bogeys on his way to winning the title.

This week, Francesco Molinari has had just one, on the par-four 11th in round one. The Italian is yet to miss a putt from inside seven feet.

Hello! And welcome to one of THE great sporting days. Sunday. Augusta. The Green Jacket... if this doesn't get your stomach churning with excitement then nothing will.

Frankie Molinari - who could be a character from the Teenage Mutant Ninja Turtles (that's Rocksteady, if you're wondering...) - is TWO shots clear of the chasing pack.

And he hasn't dropped a shot for 43 holes...

Image source, Getty Images