Western Storm 101 for 3 (George 47*, Hennessy 29*) beat Thunder 100 for 9 (Lamb 28, Harvey 3-13) by seven wickets
Nicole Harvey produced her best bowling performance of the tournament to propel Western Storm to a seven-wicket Charlotte Edwards Cup win over Thunder at Cardiff.
The 28-year-old Welsh Fire leg-spinner claimed 3 for 13 in four overs as Thunder were restricted to 100 for 9 in their 20 overs, only Emma Lamb and Eleanor Threlkeld making it into double figures.
Storm took the pace off the ball to good effect and held their catches in a disciplined fielding display, Georgia Hennessy, Claire Nicholas and Fi Morris all making telling contributions.
Hennessy and Katie George then scored 29 not out and 47 not out respectively, staging a match-winning unbroken fourth-wicket stand of 67 in 11.2 overs as Storm, playing in the Welsh capital for the first time, reached their target with 14 balls to spare to complete the double over the Group B leaders and revive their prospects of qualifying for Finals Day.
Put in to bat on a slow, green-tinged Sophia Gardens pitch, Thunder nevertheless made a brisk start, Lamb forcing the issue in an opening stand of 32 in 5.9 overs with Georgie Boyce. In decent form following a stint with Manchester Originals in the Hundred, Lamb raised 28 from 20 balls, including three boundaries, to suggest a big score was on the cards.
But Storm captain Sophie Luff's decision to deploy spin from both ends during the power-play paid dividends, the returning Claire Nicholas running out Boyce for eight with a superb pick-up-and-throw from mid-on and then inducing Lamb to hit straight to Morris at long-on in the next over. Lauren Parfitt conceded a miserly nine runs in three overs to create pressure and, when Harvey struck with her third ball from the River End to bowl Natalie Brown for one, Thunder had lost three wickets in 11 balls and the balance of power had fundamentally shifted.
Harvey's slow left arm made further in-roads, Kate Cross miss-timing a drive to long-on and Laura Marshall holing out to George at deep mid-wicket as the visitors subsided to 56 for 5. Harvey's three wickets in as many overs served to undermine the middle order, after which Thunder were reliant upon Threlkeld to dig them out of trouble. She had advanced her score to 22 from 27 balls when off spinner Morris bowled her, while Hennessy uprooted Alice Dyson's off stump as seam at last made a wicket-taking contribution.
Hennessy then ran out Danielle Collins for seven and Alex Hartley fell to the final delivery, sent down by Lauren Filer, as Thunder came up short.
Thunder needed to take early wickets and Lamb and Hannah Jones obliged, removing Morris and Dani Gibson inside four overs to sow seeds of doubt in Storm minds. Hartley then located Luff's outside edge and Threlkeld took a smart catch standing up to reduce Storm to 34 for 3 before Hennessy and George joined forces to restore order to the run-chase.
If Hennessy looked secure throughout in seeking to carry her bat, George adopted a more expansive role, scoring freely either side of the wicket in accruing 47 from 46 balls, with eight fours. Hennessy's sound judgment yielded a solitary boundary in a well-paced innings that spanned 42 balls and served to calm any nerves among team-mates watching from the dressing room balcony.
