Nottinghamshire set up a YB40 Final showdown against Glamorgan at Lord's on Saturday 21 September after hammering Somerset by eight wickets at Trent Bridge.
A fine bowling performance, led by seamer Jake Ball's 4/25 helped the hosts dismiss 2010 and 2011 finalists Somerset for just 119 after rain had delayed the start and reduced the fixture to 35 overs per-side.
Peter Trego was the top scorer for the visitors with 40, but their strong looking top order were found lacking on the day by a sustained display of disciplined fast bowling, with Harry Gurney (1/11), Ajmal Shahzad (2/23) and Steven Mullaney (3/35) all bowling well.
The target never looked like a realistic challenge for a talented and experienced Notts batting line-up - despite the loss of England t20 opener Alex Hales early on for just five.
His fellow t20 international opener Michael Lumb took the attack to the visitors though, cracking ten fours in a top score of 46 to quickly take the game out of Somerset's reach.
And after Lumb fell to Jamie Overton, Samit Patel picked up where he had left off, sweeping the Outlaws into the final with a 26-ball 43 - sealing the victory inside 17 overs.
Nottinghamshire will be favourites against surprise finalists Glamorgan at Lord's in just under two weeks time.
Tickets for the final are available to buy online now.