David Willey hits 79 off 38 balls for Yorkshire
Yorkshire reach T20 Blast Finals Day on 20 August
Glamorgan not gone to Finals Day since 2004
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Yorkshire win by 90 runs
Image source, Getty ImagesWell there you have it. Yorkshire are going to Finals Day thanks to some excellent batting from David Willey and a superb display of bowling and fielding.
If you wanted to teach a team how to win a T20 match, you would show them a video of this match.
You'll be able to read all about how they did it in more detail on the BBC Sport website shortly.
But for now, it's goodnight.
Yorkshire win by 90 runs
It will be the northern takeover of Edgbaston on 20 August as Yorkshire join fellow North Group sides Nottinghamshire, Northants and Durham in reaching the final four of the T20 Blast competition.
For Glamorgan the long wait goes on for their return to Finals Day - having last gone there in 2004.
Glamorgan 90 all out v Yorkshire 180-8
All too easy. Adil Rashid spent four hours in a car today and fittingly has his fourth wicket, taking the final dismissal of Michael Hogan to leave the visitors celebrating.
Yorkshire win by 90 runs.
Glamorgan 86-9 (12.4 overs) v Yorkshire 180-8
It's a masterclass of defending your total at Cardiff.
Rashid has his third wicket as Matthew Wait catches Timm van der Gugten at deep square and the Yorkshire fans can start booking their trains for Edgbaston on Saturday, 20 August.
Glamorgan 71-8 (11.3 overs) v Yorkshire 180-8
I'm sorry Glamorgan fans. I jinxed your captain Jacques Rudolph.
Adam Lyth takes a superb catch at long-off off the bowling of Azeem Rafiq and turns to the crowd waiting for their reaction.
This game is all but over.
Glamorgan 65-7 (10.5 overs) v Yorkshire 180-8
Adil Rashid may have traveled all the way from The Oval to Cardiff today but, if he wasn't driving, he must have had a wonderful nap in the car.
Andrew Salter doesn't pick up the spin on the seemingly Rashid's delivery and it goes through the gap and hits the middle stump.
Still Jacques Rudolph is at the crease and Yorkshire need to get him out to end all Glamorgan hope.
Glamorgan's fans finally have something to be happy about.
No, not just the rendition of 'Delilah' that was belted out over the tannoy; Jacques Rudolph is at last providing some resistance with three fours in that Liam Plunkett over.
Andrew Salter hits Glamorgan's first maximum of the innings at the end of that Rashid over. He'll be chuffed with that I'm sure.
Glamorgan 37-6 (8.2 overs) v Yorkshire 180-8
This is going to take something extraordinary for Glkamorgan now as Yorkshire are absolutely dominant.
Adil Rashid has a wicket in his second delivery as a diving Liam Plunkett takes a fine catch on the boundary and somehow manages to stay in play.
Another over down. Another over where Glamorgan can't find a boundary. Their most recent came in the third over. To me, this game is over.
(Just look at Glamorgan winning this now I've said that.)
At the moment, David Willey hit more runs in sixes during his innings than Glamorgan have scored all together.
Matthew Waite's second over goes for just the one run. Jacques Rudolph taking the single. They need a lot more than that to get back into this.
Glamorgan 34-5 (6 overs) v Yorkshire 180-8
Half of Glamorgan's wickets down now as Liam Plunkett gets in on the action. He pounds an 86mph ball down the track and it clean bowls Graham Wagg.
At the moment, it looks like all of the Finals Day teams may well come from the North Group - Nottinghamshire, Durham, Northants and, looking increasingly likely, Yorkshire.
Poor southerners.
Could that Colin Ingram wicket be the end of Glamorgan's chance of reaching their first T20 Finals Day since 2004? Only five runs off that over from Matthew Waite.
Glamorgan 269-4 (4.4 overs) v Yorkshire 180-8
Matthew Waite comes in for his first bowl of the 2016 T20 Blast in his first match and has his first wicket (lots of firsts) and it's a big one.
Colin Ingram, the man with the most sixes in the T20 Blast this season, heaves out to Will Rhodes at third man and 20-year-old Waite looks absolutely delighted with himself.
Glamorgan 24-3 (3.4 overs) v Yorkshire 180-8
Three wickets in the power play for Yorkshrie and they are right on top in this match.
David Willey bowls a little fuller and its a nasty looking heave and miss from Aneurin Donald and the ball strikes the stumps.
Jacques Rudolph has come in to partner Colin Ingram and they need to settle this innings down for the Welsh side.
Big appeal for lbw off the final ball of Tim Bresnan's over but the umpire rightly says the ball hits Aneurin Donald's pad too high. Just four runs off that over.
Glamorgan 21-2 (2.2 overs) v Yorkshire 180-8
Tim Bresnan has his second wicket of the match already and it's the other opener Mark Wallace.
Wallace plays the ball right into the hands of Liam Plunkett at cover and Glamorgan need to calm themselves down.
David Willey, imperious with the bat in this match, opens the bowling from the other end but after a couple of balls go just past the bat, Colin Ingram finds the gap twice for fours.
Lloyd's dismissal has only brought the T20 Blast's top six scorer of 2016 to the crease in Colin Ingram.
He may not have found a maximum in this over, but he slashes the final ball into the offside for four.
Glamorgan 0-1 (0.1 overs) v Yorkshire 180-8
What a start for Yorkshire!
Glamorgan opener David Lloyd plays on to his own stumps with the first ball of the innings and Tim Bresnan wheels away in delight.
Image source, Getty Images